WO2016129109A1 - 半導体装置およびその製造方法 - Google Patents
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Definitions
- the present invention relates to a semiconductor device and a manufacturing method thereof, and can be suitably used for a semiconductor device including a solid-state imaging element and a manufacturing method thereof, for example.
- CMOS Complementary Metal Oxide Semiconductor
- image sensors solid-state image sensors
- An image sensor as a semiconductor device provided with this CMOS image sensor has a plurality of pixels formed on the upper surface of a semiconductor substrate.
- the plurality of pixels are arranged in a matrix in a plan view and detect light respectively.
- Each of the plurality of pixels is formed with a photoelectric conversion element such as a photodiode that detects light and generates a charge.
- Patent Document 1 discloses a technique in which a condensing unit is disposed on a plurality of light receiving units in a solid-state imaging device.
- Patent Document 2 discloses a technique in which photoelectric conversion regions are two-dimensionally arranged in a solid-state imaging device.
- Patent Document 3551437 discloses a technique in which a plurality of light receiving units, a plurality of color filters, and a plurality of light collecting units are provided on a substrate in a solid-state imaging device.
- Patent No. 3478796 discloses a technique in which photoelectric conversion regions are two-dimensionally arranged in a solid-state imaging device.
- Patent No. 3551437 discloses a technique in which a plurality of light receiving units, a plurality of color filters, and a plurality of light collecting units are provided on a substrate in a solid-state imaging device.
- Patent Document 4 describes a technique in which a plurality of light receiving units and a plurality of on-chip lenses are provided in a solid-state imaging device.
- Patent No. 4004302 describes a technique in which a plurality of pixels including light receiving elements, color filters, and microlenses are arranged in a matrix in an imaging element.
- Patent Document 6 describes a technique in which an imaging device includes an imaging element having a light receiving element and a microlens, and an imaging lens.
- An image sensor as such a semiconductor device has a light shielding film formed above a semiconductor substrate.
- the light shielding film shields unnecessary light so that the light is appropriately incident on the photodiode formed in each of the plurality of pixels.
- an opening is formed in a portion of the light shielding film located on each photodiode.
- the incident light incident on the pixels arranged on the peripheral side of the array of the plurality of pixels is incident from a direction inclined with respect to a direction perpendicular to the upper surface of the semiconductor substrate.
- a part of the light incident on each pixel is not incident on the photodiode included in the pixel, so that the sensitivity of the photodiode PD is reduced, that is, shading occurs.
- the opening formed in the light-shielding film is subjected to a reduction process for reducing the center of the position of the center of the arrangement of the plurality of pixels, that is, a shrink process, so that the opening It is conceivable to shift.
- a shrink process for reducing the center of the position of the center of the arrangement of the plurality of pixels
- the shrink process is performed on the opening of the light shielding film, the light incident on each pixel is a wiring layer above the semiconductor substrate and included in a wiring layer of a layer different from the light shielding film. Therefore, it is difficult to prevent or suppress shading. Therefore, the sensitivity of the CMOS image sensor is lowered, and the performance of the semiconductor device is lowered.
- a semiconductor device includes a plurality of first wirings formed in the same layer above a semiconductor substrate, a second wiring formed in the same layer as each of the plurality of first wirings, Have The plurality of first wirings extend in the first direction in a plan view and are arranged at a first pitch in a second direction intersecting the first direction, and the plurality of second wirings in a plan view Each extends in the first direction and is arranged at a second pitch in the second direction. The plurality of first wirings are electrically connected to each of the plurality of second wirings, and the first pitch is smaller than the second pitch.
- the performance of the semiconductor device can be improved.
- FIG. 1 is a plan view showing a configuration of a semiconductor device according to a first embodiment.
- 1 is a cross-sectional view illustrating a configuration of a semiconductor device according to a first embodiment.
- 1 is a cross-sectional view illustrating a configuration of a semiconductor device according to a first embodiment.
- 3 is a plan view showing a wiring layout of a first wiring layer in the first embodiment.
- FIG. 3 is a plan view showing a wiring layout of a first wiring layer in the first embodiment.
- FIG. 4 is a plan view showing wiring layout data of the uppermost wiring layer in the first embodiment.
- FIG. 4 is a plan view showing wiring layout data of the uppermost wiring layer in the first embodiment.
- FIG. 4 is a plan view showing wiring layout data of the uppermost wiring layer in the first embodiment.
- FIG. 4 is a plan view showing wiring layout data of the uppermost wiring layer in the first embodiment.
- FIG. 4 is a plan view showing wiring layout data of the uppermost wiring layer in the first embodiment
- FIG. 4 is a plan view showing wiring layout data of the uppermost wiring layer in the first embodiment.
- FIG. 4 is a plan view showing wiring layout data of the uppermost wiring layer in the first embodiment.
- FIG. 5 is a process flow diagram showing a part of a wiring layout design process and an exposure mask manufacturing process.
- 3 is a plan view showing wiring layout data of a first wiring layer in the first embodiment.
- FIG. 3 is a plan view showing wiring layout data of a first wiring layer in the first embodiment.
- FIG. 3 is a plan view showing wiring layout data of a first wiring layer in the first embodiment.
- FIG. 3 is a plan view showing wiring layout data of a first wiring layer in the first embodiment.
- FIG. 3 is a plan view showing wiring layout data of a first wiring layer in the first embodiment.
- FIG. 3 is a plan view showing wiring layout data of a first wiring layer in the first embodiment.
- FIG. 3 is a plan view showing wiring layout data of a first wiring layer in the first embodiment.
- FIG. 10 is a plan view showing another example of an arrangement layout in the first wiring layer in the first embodiment.
- FIG. 6 is a manufacturing process flow chart showing a part of the manufacturing process of the semiconductor device of the first embodiment.
- 7 is a fragmentary cross-sectional view of the semiconductor device of First Embodiment during a manufacturing step thereof;
- FIG. 7 is a fragmentary cross-sectional view of the semiconductor device of First Embodiment during a manufacturing step thereof;
- FIG. 7 is a fragmentary cross-sectional view of the semiconductor device of First Embodiment during a manufacturing step thereof;
- FIG. 7 is a fragmentary cross-sectional view of the semiconductor device of First Embodiment during a manufacturing step thereof;
- FIG. 7 is a fragmentary cross-sectional view of the semiconductor device of First Embodiment during a manufacturing step thereof;
- FIG. 6 is a manufacturing process flow chart showing a part of the manufacturing process of the semiconductor device of the first embodiment.
- 7 is a fragmentary cross-sectional view
- FIG. 7 is a fragmentary cross-sectional view of the semiconductor device of First Embodiment during a manufacturing step thereof;
- FIG. 7 is a fragmentary cross-sectional view of the semiconductor device of First Embodiment during a manufacturing step thereof;
- FIG. It is sectional drawing which shows the structure of the semiconductor device of a comparative example. It is a top view which shows the wiring layout of the 1st wiring layer in a comparative example.
- FIG. 22 is a plan view showing a first modification example of the wiring layout of the first wiring layer in the first modification example of the first embodiment;
- FIG. 22 is a plan view showing another example of the wiring layout of the first wiring layer in the first modification of the first embodiment.
- FIG. 22 is a plan view showing another example of the wiring layout of the first wiring layer in the first modification of the first embodiment.
- FIG. 22 is a plan view showing another example of the wiring layout of the first wiring layer in the first modification of the first embodiment.
- FIG. 25 is a plan view showing still another example of the wiring layout of the first wiring layer in the first modification of the first embodiment.
- FIG. 11 is a plan view showing a wiring layout of a first wiring layer in a second modification of the first embodiment.
- FIG. 22 is a plan view showing another example of the wiring layout of the first wiring layer in the second modification example of the first embodiment.
- FIG. 11 is a plan view showing a wiring layout of a first wiring layer in a third modification of the first embodiment.
- FIG. 29 is a plan view showing another example of the wiring layout of the first wiring layer in the third modification example of the first embodiment;
- FIG. 29 is a plan view showing another example of the wiring layout of the first wiring layer in the third modification example of the first embodiment;
- FIG. 25 is a plan view showing a wiring layout of a first wiring layer in the fourth modification example of the first embodiment.
- FIG. 29 is a plan view showing another example of the wiring layout of the first wiring layer in the fourth modification example of the first embodiment.
- FIG. 10 is a plan view showing a wiring layout of a second wiring layer in the second embodiment.
- FIG. 10 is a plan view showing a wiring layout of a second wiring layer in the second embodiment.
- FIG. 11 is a plan view showing wiring layout data of a second wiring layer in the second embodiment.
- FIG. 11 is a plan view showing wiring layout data of a second wiring layer in the second embodiment.
- FIG. 11 is a plan view showing wiring layout data of a second wiring layer in the second embodiment.
- FIG. 11 is a plan view showing wiring layout data of a second wiring layer in the second embodiment.
- FIG. 11 is a plan view showing wiring layout data of a second wiring layer in the second embodiment.
- FIG. 10 is a plan view showing the wiring layout data of the second wiring layer in the second embodiment superimposed on the wiring layout data of the first wiring layer.
- FIG. 32 is a plan view showing a wiring layout of a second wiring layer in the first modification example of the second embodiment.
- FIG. 32 is a plan view showing a wiring layout of a second wiring layer in the first modification example of the second embodiment.
- FIG. 32 is a plan view showing a wiring layout of a second wiring layer in the first modification example of the second embodiment.
- FIG. 16 is a plan view showing wiring layout data of a second wiring layer superimposed on wiring layout data of a first wiring layer in a first modification of the second embodiment.
- FIG. 29 is a plan view showing another example of the wiring layout of the second wiring layer in the first modification of the second embodiment.
- FIG. 29 is a plan view showing another example of the wiring layout of the second wiring layer in the first modification of the second embodiment.
- FIG. 22 is a plan view showing the wiring layout of the first wiring layer in the second modification of the second embodiment, overlaid with the wiring layout data of the second wiring layer.
- FIG. 38 is a plan view showing a wiring layout of a first wiring layer in a second modification example of the second embodiment.
- FIG. 38 is a plan view showing a wiring layout of a first wiring layer in a second modification example of the second embodiment.
- FIG. 38 is a plan view showing another example of the wiring layout of the first wiring layer in the second modification example of the second embodiment.
- FIG. 38 is a plan view showing another example of the wiring layout of the first wiring layer in the second modification example of the second embodiment.
- FIG. 38 is a plan view showing another example of the wiring layout of the first wiring layer in the second modification example of the second embodiment.
- FIG. 38 is a plan view showing another example of the wiring layout of the first wiring layer in the second modification example of the second embodiment.
- FIG. 38 is a plan view showing a wiring layout of a second wiring layer in the third modification example of the second embodiment.
- FIG. 38 is a plan view showing a wiring layout of a second wiring layer in the third modification example of the second embodiment.
- FIG. 38 is a plan view showing another example of the wiring layout of the second wiring layer in the third modification example of the second embodiment.
- FIG. 38 is a plan view showing a wiring layout of a second wiring layer in the fourth modification example of the second embodiment.
- FIG. 38 is a plan view showing a wiring layout of a second wiring layer in the fourth modification example of the second embodiment.
- the constituent elements are not necessarily indispensable unless otherwise specified and apparently essential in principle. Needless to say.
- the shapes, positional relationships, etc. of the components, etc. when referring to the shapes, positional relationships, etc. of the components, etc., the shapes are substantially the same unless otherwise specified, or otherwise apparent in principle. And the like are included. The same applies to the above numerical values and ranges.
- hatching may be omitted even in a cross-sectional view for easy viewing of the drawings. Further, even a plan view may be hatched to make the drawing easy to see.
- the size of each part does not correspond to the actual device, and a specific part may be displayed relatively large for easy understanding of the drawing. Even when the plan view and the cross-sectional view correspond to each other, the size of each part may be changed and displayed.
- FIG. 1 is a plan view showing the configuration of the semiconductor device of the first embodiment.
- 2 and 3 are cross-sectional views showing the configuration of the semiconductor device of the first embodiment.
- 2 is a cross-sectional view taken along line AA in FIG. 1
- FIG. 3 is a cross-sectional view taken along line BB in FIG.
- the semiconductor device includes a semiconductor substrate SB made of, for example, single crystal silicon (Si).
- the semiconductor substrate SB is a region AR1 which is a region on the upper surface as the main surface of the semiconductor substrate SB, and a region on the upper surface as the main surface of the semiconductor substrate SB, which is a region closer to the periphery of the semiconductor substrate SB than the region AR1.
- a certain area AR2 is a region on the upper surface as the main surface of the semiconductor substrate SB.
- the semiconductor device of the first embodiment has a plurality of pixels PU formed on the upper surface of the semiconductor substrate SB in the area AR1. That is, the area AR1 is a pixel area in which a plurality of pixels PU are formed.
- two directions intersecting each other, preferably orthogonal, are defined as an X-axis direction and a Y-axis direction.
- a direction perpendicular to the upper surface as the main surface of the semiconductor substrate SB is taken as a Z-axis direction.
- the plurality of pixels PU are arranged in a matrix in the X-axis direction and the Y-axis direction in plan view.
- the term “when viewed from the Z-axis direction that is a direction perpendicular to the upper surface as the main surface of the semiconductor substrate SB” is meant.
- the imaging device as the semiconductor device of the first embodiment has a peripheral circuit formed on the upper surface of the semiconductor substrate SB in the area AR2. That is, the area AR2 is a peripheral circuit area where a peripheral circuit is formed.
- the peripheral circuit is formed on the upper surface of the semiconductor substrate SB and includes, for example, a plurality of transistors used for switching the plurality of pixels PU, a wiring layer formed on the plurality of transistors, and the like.
- Each of the plurality of pixels PU includes a photodiode PD, a transfer transistor TX, an amplification transistor (not shown), and the like.
- Each of the plurality of pixels PU includes a color filter CF and a microlens ML.
- the semiconductor device has a light shielding film SF1.
- the light shielding film SF1 shields unnecessary light so that the light is appropriately incident on the photodiode PD included in each of the plurality of pixels PU.
- an opening OP1 is formed in a portion of the light shielding film SF1 located on each photodiode PD.
- the color filter CF transmits only light having a desired wavelength so that light having a desired wavelength is incident on the photodiode PD.
- the microlens ML condenses the light so that the light is appropriately incident on the photodiode PD.
- the photodiode PD is a photoelectric conversion element that receives incident light and converts it into charges.
- the transfer transistor TX is a transistor for transferring charges generated by converting incident light by the photodiode PD.
- the photodiode PD is formed on the upper surface of the semiconductor substrate SB in the region AR1.
- a p-type semiconductor layer PW into which a p-type impurity such as boron (B) is introduced is formed on the upper surface side of the semiconductor substrate SB.
- an n-type semiconductor layer NW into which an n-type impurity such as phosphorus (P) or arsenic (As) is introduced is formed in an upper layer portion of the p-type semiconductor layer PW. Therefore, in the region AR1, the p-type semiconductor layer PW is formed immediately below the n-type semiconductor layer NW.
- the p-type semiconductor layer PW and the n-type semiconductor layer NW are pn-junction and constitute a photodiode PD. That is, a plurality of photodiodes PD are formed on the upper surface of the semiconductor substrate SB in the region AR1.
- a gate electrode GE made of, for example, a polysilicon film is formed via a gate insulating film GI made of, for example, a silicon oxide (SiO 2 ) film.
- a sidewall SW made of, for example, a silicon oxide film is formed.
- the gate electrode GE is a gate electrode of the transfer transistor TX.
- the n-type semiconductor layer NW constituting the photodiode PD also serves as the source region of the transfer transistor TX.
- the drain region of the transfer transistor TX is not shown.
- the photodiode PD is connected to a transistor such as an amplifying transistor for amplifying a signal output from the photodiode PD via a transfer transistor TX, but only the transfer transistor TX is shown here.
- the illustration of the element isolation region and the like is omitted.
- an interlayer insulating film IL made of, for example, a silicon oxide film is formed on the upper surface of the semiconductor substrate SB so as to cover the photodiode PD and the transfer transistor TX. Further, the upper surface of the interlayer insulating film IL is planarized by a CMP (Chemical-Mechanical-Polishing) method or the like.
- a cap insulating film CAP made of, for example, a silicon nitride film may be formed on the upper surface of the photodiode PD, the upper surface of the gate electrode GE, and the surface of the sidewall SW formed on the side surface of the gate electrode GE.
- the interlayer insulating film IL is formed on the photodiode PD and the transfer transistor TX via the cap insulating film CAP.
- a plurality of contact plugs that reach the semiconductor substrate SB through the interlayer insulating film IL can be formed.
- the upper surface of the contact plug and the upper surface of the interlayer insulating film IL are planarized by a CMP method or the like.
- an interlayer insulating film IL1 made of, for example, a silicon oxide (SiO 2 ) film is formed on the interlayer insulating film IL.
- a plurality of wiring trenches penetrating the interlayer insulating film IL1 are formed.
- a copper (Cu) film is embedded in each of the plurality of wiring grooves, whereby the wiring WR11 is formed in each of the plurality of wiring grooves.
- the wiring WR11 is electrically connected to a semiconductor element such as the photodiode PD or the transfer transistor TX formed on the upper surface of the semiconductor substrate SB via the contact plug.
- the interlayer insulating film IL1 and the wiring WR11 constitute a first wiring layer ML1.
- the wiring WR11 is disposed between two adjacent pixels PU. Accordingly, it is possible to prevent or suppress the incident light from being blocked by the wiring WR11 when the light is incident on the photodiode PD included in each of the plurality of pixels PU. Note that the upper surfaces of the wiring WR11 and the interlayer insulating film IL1 may be planarized by a CMP method or the like.
- an interlayer insulating film IL2 made of, for example, a carbon-containing silicon oxide (SiOC) film is formed.
- a plurality of wiring grooves are formed on the upper surface of the interlayer insulating film IL2, and a plurality of via holes (not shown) penetrating the interlayer insulating film IL2 are formed on the bottom surfaces of the wiring grooves.
- a wiring WR21 is formed inside each of the plurality of wiring grooves, and a via ( (Not shown) is formed.
- the wiring WR21 is electrically connected to the wiring WR11 through the via.
- interlayer insulating film IL2 the wiring WR21 and the via (not shown) constitute a second wiring layer ML2.
- the wiring WR21 is disposed between two adjacent pixels PU. Thereby, when the light is incident on the photodiode PD included in each of the plurality of pixels PU, it is possible to prevent or suppress the incident light from being blocked by the wiring WR21.
- the upper surfaces of the wiring WR21 and the interlayer insulating film IL2 are planarized by a CMP method or the like.
- an interlayer insulating film IL3 made of, for example, a carbon-containing silicon oxide (SiOC) film is formed.
- a plurality of wiring grooves are formed on the upper surface of the interlayer insulating film IL3.
- a copper (Cu) film is embedded in each of the plurality of wiring grooves, thereby forming a light shielding film SF1 in each of the plurality of wiring grooves.
- the wiring WR3 is formed in the same layer as the light shielding film inside the wiring trench TR3.
- the interlayer insulating film IL3, the light shielding film SF1, and the wiring WR3 constitute a third wiring layer ML3.
- the light shielding film SF1 is disposed between two adjacent pixels PU. Thereby, when light is incident on the photodiode PD included in each of the plurality of pixels PU, it is possible to prevent or suppress the incident light from being blocked by the light shielding film SF1. Note that the upper surfaces of the light shielding film SF1 and the interlayer insulating film IL3 are planarized by a CMP method or the like.
- the light shielding film SF1 is integrally formed in the region AR1. Therefore, the light shielding film SF1 has a plurality of openings OP1 formed in a matrix in the X-axis direction and the Y-axis direction, and a pixel PU is formed in each of the plurality of openings OP1.
- the semiconductor device of the first embodiment has the plurality of wiring layers ML1, ML2, and ML3 formed in the regions AR1 and AR2 above the upper surface of the semiconductor substrate SB. Further, the wiring WR11 is included in the wiring layer ML1 lower than the uppermost wiring layer ML3, and the wiring WR21 is included in the wiring layer ML2 lower than the uppermost wiring layer ML3.
- the light shielding film SF1 may be included in a lower wiring layer than the uppermost wiring layer, and the wiring WR11 or the wiring WR21 may be included in a wiring layer above the light shielding film.
- an insulating film IL4 made of, for example, a silicon nitride film is formed on the interlayer insulating film IL3, the light shielding film SF1, and the wiring WR3, an insulating film IL4 made of, for example, a silicon nitride film is formed.
- a partition wall BW made of, for example, a silicon oxide film is formed on the insulating film IL4 between two adjacent pixels PU.
- a color filter CF is formed between adjacent partition walls BW.
- the color filter CF is a film that transmits light of a specific color such as red (R), green (G), or blue (B) and does not transmit light of other colors.
- the imaging device which is the semiconductor device according to the first embodiment receives light irradiated to each pixel PU from the main surface side of the semiconductor substrate SB, that is, the upper surface side, as incident light by the photodiode PD included in each pixel PU. Then, it is converted into electric charges, and the converted electric charges are read as signal information, thereby obtaining image information data and the like.
- a microlens ML having a convex curved surface as an upper surface is formed on the color filter CF.
- the microlens ML is a convex lens whose upper surface is curved, and is made of a film that transmits light.
- the microlens ML condenses the light irradiated to each pixel PU from the main surface side, that is, the upper surface side of the semiconductor substrate SB, on the photodiode PD.
- the relative position with respect to is shifted toward the center of the array of the plurality of pixels PU as the peripheral side of the array of the plurality of pixels PU is closer.
- the relative position of the wiring WR21 adjacent to the central portion of the array of the plurality of pixels PU in each pixel PU with respect to the photodiode PD included in the pixel PU is the position of the array of the plurality of pixels PU.
- the relative position of the opening OP1 included in each pixel PU with respect to the photodiode PD included in the pixel PU is the center of the array of the plurality of pixels PU toward the periphery of the array of the plurality of pixels PU. It is shifted to the side.
- the shift amount DS1 of the wiring WR11, the shift amount DS2 of the wiring WR21, and the shift amount DS3 of the opening OP1 increase in this order.
- FIG. 4 and 5 are plan views showing the wiring layout of the first wiring layer in the first embodiment.
- FIG. 5 is an enlarged plan view of a region RG1 in FIG.
- the first wiring layer ML1 includes a plurality of wirings WR11 and a plurality of wirings WR12.
- the plurality of wirings WR11 are formed in the same layer in the first wiring layer ML1 in the upper surface area AW11 as the main surface of the semiconductor substrate SB (see FIG. 3).
- the plurality of wirings WR12 are formed in the same layer as the plurality of wirings WR11 in the upper surface region AW12 as the main surface of the semiconductor substrate SB (see FIG. 3).
- the area AW12 is an area arranged on one side of the area AW11 in the X-axis direction in plan view.
- a plurality of pixels PU are formed in the region AW11, and a peripheral circuit is formed in the region AW12.
- the plurality of wirings WR11 extend in the X-axis direction in a plan view in the area AW11 and are arranged at a pitch PT11 in the Y-axis direction.
- the plurality of wirings WR12 extend in the X-axis direction in the area AW12 in a plan view, and are arranged at a pitch PT12 in the Y-axis direction.
- the first wiring layer ML1 has a plurality of connection wirings CW1. That is, the plurality of connection wirings CW1 are formed in the same layer as the plurality of wirings WR11, respectively.
- the plurality of wirings WR11 are connected to the plurality of wirings WR12 through the plurality of connection wirings CW1, respectively. With such an arrangement, the plurality of wirings WR11 are electrically connected to each of the plurality of wirings WR12.
- the plurality of wirings WR12 are connected to, for example, transistors included in the peripheral circuit. Therefore, the plurality of wirings WR11 are connected to the peripheral circuits through the plurality of wirings WR12, respectively.
- the pitch PT11 is smaller than the pitch PT12.
- the interval between the two adjacent wires WR11 is set to the distance between the two adjacent wires WR12 in the region AW12 in which the peripheral circuit is formed. It can be made shorter than the interval between them.
- the width WD11 in the Y-axis direction of the end portion EP11 on the region AW12 side of each wiring WR11 is preferably the wiring WR12 connected to each wiring WR11 among the plurality of wirings WR12.
- the end portion EP12 on the side of the region AW11 is narrower than the width WD12 in the Y-axis direction.
- any of the plurality of wirings WR11 has a wiring WR11 in the Y-axis direction that is more than the wiring WR12 connected to any one of the plurality of wirings WR12 in plan view. It will be shifted to the shrink center position CT11 side. Further, among the plurality of wirings WR11, the wiring WR11 arranged at the negative end in the Y-axis direction of the arrangement of the plurality of wirings WR11 is connected to the wiring WR11 among the plurality of wirings WR12 in a plan view. The wiring WR12 is displaced from the positive side in the Y-axis direction.
- the width WD11 of each wiring WR11 When the width WD11 of each wiring WR11 is equal to each other and the width WD12 of each wiring WR12 is equal to each other, the width WD11 of each wiring WR11 may be smaller than the width WD12 of each wiring WR12.
- the width WC1 in the Y-axis direction of each connection wiring CW1 of the plurality of connection wirings CW1 is the end of the wiring WR11 connected to each connection wiring CW1 among the plurality of wirings WR11 on the region AW12 side.
- the part EP11 is wider than the width WD11 in the Y-axis direction.
- the width WC1 in the Y-axis direction of each connection wiring CW1 is equal to or larger than the width WD12 in the Y-axis direction of the end portion EP12 on the region AW11 side of the wiring WR12 connected to each connection wiring CW1 among the plurality of wirings WR12. It is.
- the entire side surface on the region AW12 side in the X-axis direction of the end portion EP11 of the wiring WR11 is covered. Can be connected to the connection wiring CW1. Further, the entire side surface on the region AW11 side in the X-axis direction of the end portion EP12 of the wiring WR12 can be connected to the connection wiring CW1.
- connection wiring CW1a among the plurality of connection wirings CW1 is connected to the wiring WR11a among the plurality of wirings WR11 and is connected to the wiring WR12a among the plurality of wirings WR12.
- a side surface of the connection wiring CW1a on the shrink center position CT11 side in the Y-axis direction is a side surface SC1
- a side surface of the connection wiring CW1a opposite to the shrink center position CT11 side in the Y-axis direction is a side surface SC2.
- the side surface of the end portion EP11 of the wiring WR11a on the shrink center position CT11 side in the Y-axis direction is referred to as a side surface SW11, and the side surface of the end portion EP11 of the wiring WR11a opposite to the shrink center position CT11 side in the Y-axis direction is defined.
- the side surface of the end portion EP12 of the wiring WR12a on the shrink center position CT11 side in the Y-axis direction is referred to as a side surface SW21, and the side surface of the end portion EP12 of the wiring WR12a on the side opposite to the shrink center position CT11 side in the Y-axis direction.
- the side surface SW22 is referred to as a side surface SW11, and the side surface of the end portion EP11 of the wiring WR11a opposite to the shrink center position CT11 side in the Y-axis direction.
- the side surface SC1 and the side surface SW11 form the same surface, and the side surface SC2 and the side surface SW22 form the same surface.
- the entire side surface on the region AW12 side in the X-axis direction of the end portion EP11 of the wiring WR11a is connected to the connection wiring CW1a, and the entire side surface on the region AW11 side in the X-axis direction of the end portion EP12 of the wiring WR12a is connected to the connection wiring CW1a. Connections can be made and the width WC1 of the connection wiring CW1a can be made the smallest.
- a method for designing a wiring layout in the wiring layer including a method for manufacturing an exposure mask.
- a wiring layout design method in the uppermost wiring layer will be described, and then a wiring layout design method in a wiring layer lower than the uppermost layer will be described.
- the layout of each layer other than the wiring layer, for example, the chip layout can be designed in the same manner.
- 6 to 10 are plan views showing wiring layout data of the uppermost wiring layer in the first embodiment.
- chip layout data for creating mask data used in each manufacturing process of an image sensor as a semiconductor device is created as GDS2 stream data or the like.
- mask data is created. Due to the mask size effect or optical proximity effect (Optical Proximity ⁇ Effect), there is a difference in shape between the exposure pattern formed on the reticle surface as an exposure mask and the resist pattern formed on the semiconductor substrate. To do. Therefore, in order to correct the above-described shape difference, a correction process called a so-called OPC process is performed on the layout data in each layer to create mask data as pattern data for each layer. At this time, as shown in FIG. 6, mask data DAT3 as pattern data is created for the uppermost wiring layer ML3.
- the mask data DAT3 includes an area AR1 that is a partial area of the plane FS and an area AR2 that is a partial area of the plane FS.
- the area AR1 is an area in which a plurality of pixels PU are arranged in a matrix, for example, in the X-axis direction and the Y-axis direction, that is, a pixel area.
- the area AR2 is an area where a peripheral circuit is formed, that is, a peripheral circuit area.
- the light shielding film SF1 is arranged in the area AR1, and the wiring WR3 is arranged in the area AR2. Further, in the light shielding film SF1, the pixel PU is formed so that light is incident on the photodiode PD (see FIG. 2) included in the pixel PU in a portion where the pixel PU is formed, that is, a portion where the light is incident. An opening OP1 is arranged for each.
- the partial mask data is cut out.
- the partial mask data DAT33 as pattern data which is composed of the portion arranged in the area AW33, is cut out from the mask data DAT3 of the uppermost wiring layer ML3.
- the region AW33 is a region including a region in which a plurality of pixels PU are formed in the region AR1.
- the area other than the area AW33 is referred to as an area AW32.
- a portion disposed in the region AW33 is referred to as a light shielding film SF11. Further, a portion of the light shielding film SF1 disposed in the region AW32 is referred to as a light shielding film SF12.
- a shrink process is performed.
- the cut-out partial mask data DAT33 is subjected to a reduction process, that is, a shrink process, which is reduced at a constant magnification around the position CT31 in the partial mask data DAT33.
- a reduction process that is, a shrink process, which is reduced at a constant magnification around the position CT31 in the partial mask data DAT33.
- the reduced partial mask data is pasted.
- the reduced partial mask data DAT31 is set in the area AW33 of the plane FS so that the position CT31 in the reduced partial mask data DAT31 has the same coordinates as the position CT32 (see FIG. 7) on the center side of the area AW33.
- the area is pasted to the area AW31 which is an area away from the area AW32.
- the area between the area AW31 and the area AW32 is a gap area AW34 in which no mask data is created.
- gap portion mask data is created.
- gap portion mask data DAT34 as pattern data is formed in the gap region AW34, and the gap region AW34 is embedded with the gap portion mask data DAT34.
- mask data DAT3a as pattern data having reduced partial mask data DAT31, gap partial mask data DAT34, and mask data DAT3 is created.
- the gap portion mask data DAT34 includes a light shielding film SF13 disposed on the entire surface of the gap region AW34.
- the light shielding film SF1 including the light shielding films SF11, SF12, and SF13 is disposed.
- FIG. 11 is a process flow diagram showing a part of the wiring layout design process and the exposure mask manufacturing process.
- 12 to 16 are plan views showing wiring layout data of the first wiring layer in the first embodiment.
- the design method in the first wiring layer ML1 will be described as an example.
- the present invention can also be applied to a design method in wiring layers other than the first layer, such as the second wiring layer ML2. Further, in the following, description of portions common to the design method in the uppermost wiring layer ML3 will be omitted.
- mask data is created as shown in FIG. 12 (step S1 in FIG. 11).
- mask data DAT1 is prepared as pattern data for the first wiring layer ML1 by performing correction processing called so-called OPC processing on the layout data in the first wiring layer ML1.
- the mask data DAT1 has a region AR1 that is a partial region of the plane FS and a region AR2 that is a partial region of the plane FS.
- the plurality of pixels PU are arranged in a region AW13 which is a partial region of the region AR1 as a pixel region.
- the area other than the area AW13 in the areas AR1 and AR2 is referred to as an area AW12.
- a plurality of wirings (wiring patterns) WR13 are arranged from the area AR1 to the area AR2.
- the plurality of wirings WR13 extend in the X-axis direction and are arranged at a pitch PT12 in the Y-axis direction. That is, the mask data DAT1 extends in the X-axis direction in the area AW13 and is arranged in the X-axis direction in the plurality of wirings (wiring patterns) WR13 that are arranged at the pitch PT12 in the Y-direction and in the X-axis direction in the area AW12.
- a plurality of wirings (wiring patterns) WR13 that extend and are arranged at a pitch PT12 in the Y-axis direction.
- partial mask data is cut out (step S2 in FIG. 11).
- step S2 partial mask data DAT13 as pattern data, which is composed of a portion arranged in the region AW13, is cut out from the mask data DAT1 of the first wiring layer ML1.
- a portion arranged in the area AW13 is referred to as a wiring (wiring pattern) WR11.
- a portion of the wiring WR13 disposed in the region AW12 is referred to as a wiring (wiring pattern) WR12.
- the plurality of wirings WR11 extend in the X-axis direction and are arranged at a pitch PT12 in the Y-axis direction.
- the plurality of wirings WR12 extend in the X-axis direction and are arranged at a pitch PT12 in the Y-axis direction.
- a shrink process is performed (step S3 in FIG. 11).
- the cut-out partial mask data DAT13 is subjected to a reduction process, ie, a shrink process, for reducing at a constant magnification around the position CT11 in the partial mask data DAT13.
- reduced partial mask data DAT11 is created as pattern data, each consisting of a plurality of reduced wirings (wiring patterns) WR11.
- the plurality of wirings WR11 extend in the X-axis direction and are arranged at a pitch PT11 in the Y-axis direction.
- the pitch PT11 is smaller than the pitch PT12.
- the reduced partial mask data is pasted (step S4 in FIG. 11).
- the reduced partial mask data DAT11 is converted into an area in the area AW13 of the plane FS so that the position CT11 in the reduced partial mask data DAT11 has the same coordinates as the position CT12 in the area AW13 (see FIG. 13).
- it is pasted on the area AW11 which is an area away from the area AW12.
- the area between the area AW11 and the area AW12 is a gap area AW14 in which no mask data is created.
- gap portion mask data is created (step S5 in FIG. 11).
- gap portion mask data DAT14 as pattern data is formed in the gap region AW14, and the gap region AW14 is embedded with the gap portion mask data DAT14.
- mask data DAT1a as pattern data having reduced partial mask data DAT11, gap partial mask data DAT14, and mask data DAT1 is created.
- the gap portion mask data DAT14 has a plurality of connection wirings (wiring patterns) CW1.
- the plurality of connection wirings CW1 connect each of the plurality of wirings WR11 to each of the plurality of wirings WR12.
- the coordinates of the corner formed by the positive side surface in the X-axis direction of the end portion EP12 of the wiring WR12a and the positive side surface SW21 in the Y-axis direction of the end portion EP12 of the wiring WR12a. Is (Xp1, Yp1). Further, the coordinates of the corner formed by the positive side surface in the X-axis direction of the end portion EP12 of the wiring WR12a and the negative side surface SW22 in the Y-axis direction of the end portion EP12 of the wiring WR12a are expressed as (Xp2, Yp2).
- the coordinates of the corner formed by the negative side surface in the X-axis direction of the end portion EP11 of the wiring WR11a and the positive side surface SW11 in the Y-axis direction of the end portion EP11 of the wiring WR11a are expressed as (Xp3, Yp3).
- the coordinates of the corner formed by the negative side surface in the X-axis direction of the end portion EP11 of the wiring WR11a and the negative side surface SW12 in the Y-axis direction of the end portion EP11 of the wiring WR11a are expressed as (Xp4, Yp4).
- the minimum line width considering the mask size effect or the OPC process of the first wiring layer ML1 is defined as a width W00
- the shrink rate which is a reduction ratio in the shrink process in the first wiring layer ML1
- ⁇ is defined as ⁇ .
- the wiring WR11 is arranged such that the width WD11 of the wiring WR11 is equal to or larger than the width W1 defined by the following formula (1).
- connection wiring CW1 W00 + (1- ⁇ ) ⁇
- the coordinates of the corners of the negative side in the X-axis direction and the positive side in the Y-axis direction (upper left in FIG. 5) of the connection wiring CW1 are (Xp1, Yp3), and the X-axis direction of the connection wiring CW1
- a rectangular shape is generated in which the coordinates of the corners on the positive side and the negative side in the Y-axis direction (lower right in FIG. 5) are (Xp4, Yp2).
- the connection wiring (wiring pattern) CW1 having a rectangular shape can be easily created.
- connection wiring (wiring pattern) CW1 overlies the wiring (wiring pattern) WR11 arranged in the area AW11 and the wiring (wiring pattern) WR12 arranged in the area AW11. It is created by extending to the gap area AW14 so as to wrap.
- the space width SP1 in the Y-axis direction between two connection wirings CW1 adjacent in the Y-axis direction is equal to or larger than the minimum space width in consideration of the mask size effect or the OPC process in the first wiring layer ML1.
- the length in the X-axis direction of the region where the wiring WR11 and the wiring WR12 overlap may be shorter than the length of the gap region AW14 in the X-axis direction, and may be shorter than the length of the gap region AW14 in the X-axis direction. May be longer. In such a case, the same effect as that shown in FIG. 5 can be obtained.
- an exposure mask is manufactured (step S6 in FIG. 11).
- an exposure mask MSK is manufactured using the mask data DAT1a.
- the exposure mask MSK is formed on the surface of the substrate BS, an exposure pattern PTN1 made of a light-shielding film such as a metal film formed on the surface of the substrate BS, and the surface of the substrate.
- an exposure pattern PTN2 made of a light shielding film such as a metal film.
- the exposure pattern PTN1 is formed based on a plurality of wiring patterns of the mask data DAT1a, and is for forming a plurality of wirings WR11.
- the exposure pattern PTN2 is formed based on the plurality of wiring patterns of the mask data DAT1a, and is used to form the plurality of wirings WR12.
- the exposure mask MSK has an exposure pattern PTN3 made of a light-shielding film such as a metal film formed on the surface of the base BS.
- the exposure pattern PTN3 is formed based on a plurality of wiring patterns of the mask data DAT1a, and is used to form a plurality of connection wirings CW1.
- each of the wiring WR11 and the wiring WR12 may not have a rectangular shape in plan view.
- FIG. 17 is a plan view showing another example of an arrangement layout in the first wiring layer in the first embodiment.
- the wiring WR11 includes an end portion EP11 on the region AR2 side, an extension portion EX11 that is connected to the end portion EP11 and extends in the X-axis direction, and the end portion EP11 in the Y-axis direction.
- the width WD11 may be equal to or greater than the width WD13 of the extending portion EX11 in the Y-axis direction.
- the wiring WR12 has an end portion EP12 on the region AW11 side and an extended portion EX12 connected to the end portion EP12 and extending in the X-axis direction, and the width WD12 of the end portion EP12 in the Y-axis direction extends.
- a width WD14 or more in the Y-axis direction of the existing portion EX12 may be used.
- the side surface SW11 forms the same surface.
- the negative side surface SC2 in the Y-axis direction of the connection wiring CW1 and the negative side surface SW22 in the Y-axis direction of the end portion EP12 form the same surface.
- connection wiring CW1 are formed in a rectangular shape by the same design method as described with reference to FIGS. 11 to 16, as in the case shown in FIG.
- the connection pattern as the connection wiring CW1 can be easily created, and the same effect as that shown in FIG. 5 can be obtained.
- FIG. 18 is a manufacturing process flow chart showing a part of the manufacturing process of the semiconductor device of First Embodiment.
- 19 to 24 are main-portion cross-sectional views during the manufacturing process of the semiconductor device of First Embodiment. 19 to 24 show cross sections corresponding to the cross sectional view of FIG.
- a photodiode PD is formed (step S11 in FIG. 18).
- a semiconductor substrate SB made of, for example, single crystal silicon (Si) is prepared.
- a photodiode PD, a transfer transistor TX, an amplifying transistor, and the like constituting each pixel are provided in each of the regions AR1 (see FIG. 1), which is a pixel region in which the pixels are formed.
- a p-type semiconductor layer PW into which a p-type impurity such as boron (B) is introduced is formed on the upper surface side of the semiconductor substrate SB.
- an n-type semiconductor layer NW into which an n-type impurity such as phosphorus (P) or arsenic (As) is introduced is formed in the upper layer portion of the p-type semiconductor layer PW. Therefore, in the region AR1, the p-type semiconductor layer PW is formed immediately below the n-type semiconductor layer NW.
- the p-type semiconductor layer PW and the n-type semiconductor layer NW form a photodiode PD by forming a pn junction. That is, in the area AR1, a plurality of photodiodes PD are formed on the upper surface of the semiconductor substrate SB.
- a gate electrode GE made of, for example, a polysilicon film is formed on the upper surface of the semiconductor substrate SB via a gate insulating film GI made of, for example, a silicon oxide film.
- a sidewall SW made of, for example, a silicon oxide film is formed.
- the gate electrode GE is a gate electrode of the transfer transistor TX.
- the n-type semiconductor layer NW constituting the photodiode PD also serves as the source region of the transfer transistor TX.
- the drain region of the transfer transistor TX is not shown.
- the photodiode PD is connected to a transistor such as an amplifying transistor for amplifying a signal output from the photodiode PD via a transfer transistor TX.
- a transistor such as an amplifying transistor for amplifying a signal output from the photodiode PD via a transfer transistor TX.
- the transfer transistor TX is illustrated. An element isolation region and the like are not shown.
- an interlayer insulating film IL is formed (step S12 in FIG. 18).
- this step S12 as shown in FIG. 20, on the upper surface of the semiconductor substrate SB so as to cover the semiconductor elements such as the photodiode PD and the transfer transistor TX in the region where each pixel PU (see FIG. 3) is formed.
- an interlayer insulating film IL made of, for example, a silicon oxide film is formed by, eg, CVD (Chemical Vapor Deposition) method.
- the upper surface of the interlayer insulating film IL is planarized by a CMP method or the like.
- a cap insulating film CAP made of, for example, a silicon nitride film may be formed on the upper surface of the photodiode PD, the upper surface of the gate electrode GE, and the surface of the sidewall SW formed on the side surface of the gate electrode GE.
- the interlayer insulating film IL is formed on the photodiode PD and the transfer transistor TX via the cap insulating film CAP.
- a contact hole (not shown) that penetrates the interlayer insulating film IL and reaches the semiconductor substrate SB is formed, and the contact hole is filled with a metal film to form a contact.
- a plurality of contact plugs made of a metal film embedded in the hole can be formed.
- the upper surface of the contact plug and the upper surface of the interlayer insulating film IL are planarized by a CMP method or the like.
- step S13 an interlayer insulating film IL1 and a wiring WR11 are formed (step S13).
- an interlayer insulating film IL1 made of a silicon oxide (SiO 2 ) film is formed on the interlayer insulating film IL, for example, by a CVD method using tetraethoxysilane (TEOS) gas as a source gas. .
- TEOS tetraethoxysilane
- the wiring WR11 embedded in the wiring trench TR11 on the upper surface of the interlayer insulating film IL1 is formed by using a so-called single damascene method.
- a resist film RF1 is formed on the interlayer insulating film IL1.
- the resist film RF1 is subjected to pattern exposure using an exposure mask MSK.
- the exposure mask MSK includes a base BS, an exposure pattern PTN1 formed of a light shielding film such as a metal film formed on the surface of the base BS, and a light shielding film such as a metal film formed on the surface of the base BS. And an exposure pattern PTN2.
- the exposure pattern PTN1 is for forming a plurality of wirings WR11 (see FIG. 22), and the exposure pattern PTN2 is for forming a plurality of wirings WR12 (see FIG. 4).
- the exposure mask MSK has an exposure pattern PTN3 made of a light-shielding film such as a metal film formed on the surface of the base BS.
- the exposure pattern PTN3 is for forming a plurality of connection wirings CW1 (see FIG. 4).
- a resist pattern RP1 for forming a plurality of wirings WR11 is formed in the region AW11 (see FIG. 4), and the region AW12 is formed.
- a resist pattern RP2 for forming a plurality of wirings WR12 is formed.
- a resist pattern RP3 for forming a plurality of connection wirings CW1 is formed in the gap area AW14 (see FIG. 4).
- the interlayer insulating film IL1 is etched using the resist patterns RP1, RP2, and RP3 as etching masks. Accordingly, a plurality of wiring trenches TR11 for forming the plurality of wirings WR11, a plurality of wiring trenches TR12 for forming the plurality of wirings WR12, and a plurality of wiring trenches TR13 for forming the plurality of connection wirings CW1. And form.
- the interlayer insulating film IL1 can be etched by a dry etching method using, for example, a gas containing a fluorocarbon gas as an etching gas.
- a copper (Cu) film is embedded as a conductive film in each of the plurality of wiring trenches TR11, the plurality of wiring trenches TR12, and the plurality of wiring trenches TR13.
- the wiring WR11 is formed in the wiring trench TR11 in the region AW11 (see FIG. 4)
- the wiring WR12 is formed in the same layer as the wiring WR11 in the wiring trench TR12 in the region AW12 (see FIG. 4).
- the connection wiring CW1 is formed in the same layer as the wiring WR11 in the wiring trench TR13.
- the wiring WR11 is electrically connected to a semiconductor element such as the photodiode PD or the transfer transistor TX formed on the upper surface of the semiconductor substrate SB through the contact plug.
- the wiring WR11 When the wiring WR11 is formed in a region between regions where two adjacent pixels PU (see FIG. 3) are formed, when light is incident on each photodiode PD of the plurality of pixels PU, It is possible to prevent or suppress the incident light from being blocked by the wiring WR11.
- the upper surfaces of the wiring WR11 and the interlayer insulating film IL1 are planarized by a CMP method or the like.
- the wiring WR11 is not limited to a copper wiring, but can also be formed from an aluminum (Al) wiring.
- a conductive film made of an aluminum film is formed over the interlayer insulating film IL, and a resist film is formed over the conductive film.
- the resist film is subjected to pattern exposure using an exposure mask and developed to form a first resist pattern (not shown) for forming a plurality of wirings WR11 in the region AW11 (see FIG. 4).
- a second resist pattern (not shown) for forming the plurality of wirings WR12 is formed in the region AW12 (see FIG. 4).
- a third resist pattern (not shown) for forming a plurality of connection wirings CW1 is formed in the gap area AW14 (see FIG. 4).
- the conductive film is etched using the first resist pattern, the second resist pattern, and the third resist pattern as an etching mask.
- a plurality of wirings WR11 made of a conductive film are formed in the same layer above the semiconductor substrate SB, and in the region AW12 (see FIG. 4), a plurality of wires made of a conductive film are formed.
- the wiring WR12 is formed in the same layer as each of the plurality of wirings WR11.
- a plurality of connection wirings CW1 made of a conductive film are formed in the same layer as the plurality of wirings WR11, respectively.
- step S13 a photolithography process is performed using an exposure mask to form a plurality of wirings WR11 above the semiconductor substrate SB in the region AW11, and a plurality of wirings WR12 in the region AW12. Are formed in the same layer as the wiring WR11.
- an interlayer insulating film IL2 and a wiring WR21 are formed (step S14).
- step S14 first, carbon-containing oxidation is performed on the interlayer insulating film IL1 and the wiring WR11 by a CVD method using, for example, trimethylsilane (SiH (CH 3 ) 3 ) gas and oxygen (O 2 ) gas as source gases.
- An interlayer insulating film IL2 made of a silicon (SiOC) film is formed.
- a wiring WR21 embedded in the wiring trench TR2 on the upper surface of the interlayer insulating film IL2 and a via (not shown) connecting the wirings WR21 and WR11 immediately below the wiring WR21 are formed.
- the interlayer insulating film IL2 is patterned by using a photolithography technique and an etching method. Thereby, a plurality of wiring trenches TR2 are formed on the upper surface of the interlayer insulating film IL2, and a plurality of via holes (not shown) penetrating the interlayer insulating film IL2 are formed on the bottom surfaces of the wiring trenches TR2.
- the interlayer insulating film IL2 can be etched by, for example, a dry etching method using a gas containing a fluorocarbon gas as an etching gas.
- the wiring WR21 in each wiring trench and the via in each via hole are formed.
- the wiring WR21 is electrically connected to the wiring WR11 through the via.
- interlayer insulating film IL2 the wiring WR21 and the via (not shown) constitute a second wiring layer ML2.
- the wiring WR21 is formed in a region between the regions where two adjacent pixels PU (see FIG. 3) are formed. Thereby, when light enters the photodiode PD included in each pixel PU, it is possible to prevent or suppress the incident light from being blocked by the wiring WR21. Note that the upper surfaces of the wiring WR21 and the interlayer insulating film IL2 are planarized by a CMP method or the like.
- an interlayer insulating film IL3 and a light shielding film SF1 are formed (step S15).
- step S15 first, carbon-containing oxidation is performed on the interlayer insulating film IL2 and the wiring WR21 by the CVD method using, for example, trimethylsilane (SiH (CH 3 ) 3 ) gas and oxygen (O 2 ) gas as source gases.
- An interlayer insulating film IL3 made of a silicon (SiOC) film is formed.
- a wiring WR3 embedded in a wiring groove on the upper surface of the interlayer insulating film IL3 and a via (not shown) for connecting the wirings WR3 and WR21 immediately below the wiring WR3 are formed.
- the interlayer insulating film IL3 is patterned by using a photolithography technique and an etching method. Thereby, a plurality of wiring trenches TR3 are formed on the upper surface of the interlayer insulating film IL3.
- the interlayer insulating film IL3 can be etched by, for example, a dry etching method using a gas containing a fluorocarbon gas as an etching gas.
- a light shielding film SF1 is formed in each wiring trench TR3 by embedding, for example, a copper (Cu) film in each of the plurality of wiring trenches TR3.
- interlayer insulating film IL3 and the light shielding film SF1 constitute the uppermost wiring layer ML3.
- the light shielding film SF1 is formed in a region between regions where two adjacent pixels PU (see FIG. 3) are formed. Thereby, when light is incident on the photodiode PD included in each of the plurality of pixels PU, it is possible to prevent or suppress the incident light from being blocked by the light shielding film SF1. Note that the upper surfaces of the light shielding film SF1 and the interlayer insulating film IL2 are planarized by a CMP method or the like.
- an insulating film IL4 is formed (step S16 in FIG. 18).
- an insulating film IL4 made of, for example, a silicon nitride film is formed on the interlayer insulating film IL3 and the light shielding film SF1.
- a partition wall BW and a color filter CF are formed (step S17 in FIG. 18).
- a film made of, for example, a silicon oxide film is formed on the insulating film IL4 by the CVD method, and is patterned by using the photolithography technique and the etching method.
- a partition wall BW made of, for example, a silicon oxide film is formed on the insulating film IL4 in a region between regions where two adjacent pixels PU are formed.
- a color filter CF is formed between adjacent partition walls BW.
- the color filter CF is made of a film colored in, for example, red (R), green (G), and blue (B).
- a microlens ML is formed (step S18 in FIG. 18).
- the microlens ML is formed on the color filter CF.
- the microlens ML is a convex lens whose upper surface is curved, and is made of a film that transmits light.
- the microlens ML condenses the light irradiated to each pixel PU from the main surface side, that is, the upper surface side of the semiconductor substrate SB, on the photodiode PD.
- the formed film is heated and melted, and the shape of the upper surface of the film is rounded to form the microlens ML.
- FIG. 25 is a cross-sectional view showing a configuration of a semiconductor device of a comparative example.
- FIG. 26 is a plan view showing a wiring layout of the first wiring layer in the comparative example.
- FIG. 25 is a cross-sectional view taken along line BB in FIG. Note that the cross-sectional view along the line AA in FIG. 1 is the same as FIG.
- the image sensor as the semiconductor device of the comparative example also includes a CMOS image sensor, like the image sensor of the semiconductor device of the first embodiment.
- the imaging element as the semiconductor device of the comparative example also has a plurality of pixels PU formed on the upper surface of the semiconductor substrate SB in the area AR1.
- the plurality of pixels PU are arranged in a matrix in the X-axis direction and the Y-axis direction in plan view.
- Each of the plurality of pixels PU includes a photodiode PD, a transfer transistor TX, an amplification transistor (not shown), and the like.
- the photodiode PD is a photoelectric conversion element that receives incident light and converts it into charges.
- each of the plurality of pixels PU includes the color filter CF and the microlens ML as in the semiconductor device of the first embodiment. Further, the semiconductor device of the comparative example has a light shielding film SF1 as in the semiconductor device of the first embodiment.
- incident light incident on each of the plurality of pixels PU is not necessarily incident from a direction perpendicular to the upper surface of the semiconductor substrate SB.
- incident light incident on the pixels PU arranged on the peripheral side of the arrangement of the plurality of pixels PU is inclined with respect to a direction perpendicular to the upper surface of the semiconductor substrate SB. Incident from the direction. In such a case, a part of light incident on each pixel PU is not incident on the photodiode PD included in the pixel PU, so that the sensitivity of the photodiode PD is reduced, that is, shading occurs.
- a reduction process for reducing the micro lens ML, the color filter CF, and the opening OP1 of the light shielding film SF1 around the center position of the array of the plurality of pixels PU that is, It is conceivable that the microlens ML, the color filter CF, and the opening OP1 are shifted by performing a shrink process.
- the opening OP1, the color filter CF, and the microlens ML of the light shielding film SF1 are centered on the position in the area AR1 where the plurality of pixels PU are arranged, as in the first embodiment.
- the shrink process is performed on the mask data of the uppermost wiring layer ML3.
- the shrink process is not performed on the mask data of the first wiring layer ML1 and the second wiring layer ML2. Therefore, as shown in FIG. 26, the pitch of the wiring WR11 in the region AR1 where the plurality of pixels PU are arranged is equal to the pitch of the wiring WR12 in the region AR2 where the peripheral circuit is arranged.
- the incident light incident on the pixel PU arranged on the peripheral side of the array of the plurality of pixels PU is the second layer below the uppermost wiring layer ML3. Since the light is reflected on the first wiring layer ML2 or the first wiring layer ML1, it is not properly incident on the photodiode PD included in each pixel PU, and shading still occurs.
- the light incident on each pixel PU is a wiring layer above the semiconductor substrate SB, and a wiring of a layer different from the light shielding film SF1. Since it is reflected by the wiring included in the layer, it is difficult to prevent or suppress shading. Therefore, the sensitivity of the CMOS image sensor is lowered, and the performance of the semiconductor device is lowered.
- each of the plurality of pixels PU is miniaturized or highly functionalized, the photodiode included in each pixel PU so that a sufficient amount of light is incident on the photodiode PD. It is necessary to increase the area of the PD and increase the area of the opening OP1 of the light shielding film SF1.
- the number of wirings included in the first wiring layer ML1 and the number of wirings included in the second wiring layer ML2 are increased. To do. In such a case, in the semiconductor device of the comparative example, the problem of shading to incident light due to the first wiring layer ML1 and the second wiring layer ML2 becomes large.
- any position in the area AW13 including the plurality of pixels PU is set. Shrink processing is performed at the center. Therefore, in the first wiring layer ML1 which is a wiring layer other than the uppermost wiring layer ML3, the pitch of the wiring WR11 arranged in the region AW11 in the region AW13 is different from the region AW12 in the region AW12. It is smaller than the pitch of the wiring WR12 to be arranged.
- the shrink process is performed on the mask data of the first wiring layer ML1 with the position in the region where the plurality of pixels PU are arranged as the center.
- the pitch of the wiring WR11 can be made smaller than the pitch of the wiring WR12, and shading by the first wiring layer ML1 can be prevented or suppressed. Therefore, the sensitivity of the CMOS image sensor can be improved and the performance of the semiconductor device can be improved.
- the first wiring layer ML1 extends in the X-axis direction, for example. And a plurality of wirings WR13 arranged in the Y-axis direction.
- the wiring WR13 extends from a region AW13 where a plurality of pixels PU (see FIG. 3) are arranged to a region AW12 where a peripheral circuit is arranged.
- the outer periphery of the area AW13 from which the partial mask data DAT13 is cut out crosses the plurality of wirings WR13.
- the mask data is stored in the gap area AW14 between the area AW11 and the area AW12. Not created. Therefore, when creating the gap portion mask data DAT14, it is necessary to connect the wiring WR11 and the wiring WR12 between the area AW11 and the area AW12 in consideration of the pitch difference of the wiring WR11 before and after the shrink process. There is.
- the wiring WR11 arranged in the area AW11 is electrically connected to the wiring WR12 arranged in the area AW12 only after the process of creating the gap portion mask data DAT14 (step S5 in FIG. 11). Therefore, it is not sufficient to verify whether or not the wiring WR11 is connected to the wiring WR12 when creating the chip layout data, and it is also necessary to perform the verification after creating the mask data DAT1a.
- the coordinates of the corners of the connection wiring CW1 included in the gap portion mask data DAT14 are the coordinates of the corners of the end EP11 of the wiring WR11 arranged in the area AW11 and the coordinates of the corner AW12. It can be easily created by calculation using the coordinates of the corners of the end portion EP12 of the wiring WR12. Therefore, it is possible to simplify the arithmetic processing for calculating the pattern arrangement as the connection wiring CW1 included in the gap portion mask data DAT14.
- a method such as comparison verification by a plurality of calculations can be used for the gap portion mask data DAT14, and data omission in the gap portion mask data DAT14. It can be verified relatively easily whether or not the above has occurred.
- shrink process may be performed on the wiring layers other than the first wiring layer ML1, and the shrink process may be performed on the p-type semiconductor layer PW, the n-type semiconductor layer NW, or the gate electrode GE. Good.
- shrink rate alpha
- shrink rate can also be made into the same value, and it can also adjust so that it may become a different value.
- the region AW13 to be cut out has a rectangular shape
- the wiring WR11 and the wiring WR12 have a portion between the negative end in the X-axis direction of the region AW11 and the region AW12.
- An example of connection in the gap area AW14 has been described.
- the area AW13 to be cut out does not have to have a rectangular shape.
- the wiring WR11 and the wiring WR12 may be connected by a gap region AW14 in a portion between the positive end of the region AW11 in the X-axis direction and the region AW12.
- the wiring WR11 and the wiring WR12 may be connected by a gap area AW14 at a portion between the area AW12 and the positive or negative end of the area AW11 in the Y-axis direction. In either case, the same effect as in the first embodiment can be obtained.
- the pattern as the connection wiring CW1 is created by extending the wiring WR11 arranged in the area AW11 to the area AW12 side and extending the wiring WR12 arranged in the area AW12 to the area AW11 side. It is. Therefore, the gap portion mask data DAT14 having the connection wiring CW1 can be easily created. Further, in the gap area AW14, a pattern as the connection wiring CW1 is created by overlapping a portion where the wiring WR11 is extended and a portion where the wiring WR12 is extended.
- the width WC1 of the connection wiring CW1 which is the overlapping portion, is larger than the width W00 considering the mask size effect or the OPC process of the first wiring layer ML1, and is therefore the ratio of the wiring width to the processing accuracy by exposure.
- the exposure margin can be improved.
- the width (diameter) of the via is reduced by the shrink process. For example, when the via width is 0.16 ⁇ m before the shrink process and the shrink ratio for the via is 0.95, the via width is reduced to 0.152 ⁇ m after the shrink process.
- the wiring WR11 is connected to the wiring WR12 via the connection wiring CW1 formed in the same layer as the wiring WR11. Therefore, since it is not necessary to perform a shrink process on the via, a margin for the processing accuracy of the processing dimension can be secured in the lithography process for forming the via hole, and the via hole can be formed with high shape accuracy.
- FIG. 27 is a plan view showing a wiring layout of the first wiring layer in the first modification of the first embodiment.
- 28 to 30 are plan views showing other examples of the wiring layout of the first wiring layer in the first modification of the first embodiment.
- At least one of the wiring WR11 in the region AW11 and the wiring WR12 in the region AW12 extends to the gap region AW14 and is connected to the other.
- the portion arranged in the gap area AW14 is the connection wiring CW1.
- connection wiring CW1a among the plurality of connection wirings CW1 is connected to the wiring WR11a among the plurality of wirings WR11, and is connected to the wiring WR12a among the plurality of wirings WR12. It shall be. Further, the wiring WR11a is shifted to the shrink center position CT11 side in the Y-axis direction from the wiring WR12a.
- the end portion EP11 on the region AW12 side of the wiring WR11 is extended to a portion in contact with the region AW12 in the gap region AW14, and the extended end portion EP11 is the end portion EP12 on the region AW11 side of the wiring WR12. In contact with. Further, the end portion EP11 of the extended portion corresponds to the connection wiring CW1.
- the portion opposite to the shrink center position CT11 side in the Y-axis direction is Y in the end portion EP12 on the region AW11 side of the wiring WR12a in plan view. It is in contact with the portion on the shrink center position CT11 side in the axial direction.
- the end portion EP12 of the wiring WR12 on the region AW11 side is extended to the portion of the gap region AW14 that contacts the region AW11, and the extended end portion EP12 is the end portion EP11 of the wiring WR11 on the region AW12 side. In contact with. Further, the end portion EP12 of the extended portion corresponds to the connection wiring CW1.
- the portion on the opposite side to the shrink center position CT11 side in the Y-axis direction is the portion of the end portion EP12 on the region AW11 side of the wiring WR12a in the plan view. It is in contact with the portion on the shrink center position CT11 side in the Y-axis direction.
- the end portion EP11 of the wiring WR11 on the region AW12 side is extended to the central portion of the gap region AW14
- the end portion EP12 of the wiring WR12 on the region AW11 side is extended to the central portion of the gap region AW14
- the extended end EP11 is in contact with the extended end EP12.
- the connection wiring CW1 is formed by the end portion EP11 of the extended portion and the end portion EP12 of the extended portion.
- the portion on the opposite side to the shrink center position CT11 side in the Y-axis direction is the Y axis among the end portion EP12 on the region AW11 side of the wiring WR12a. It is in contact with the portion on the shrink center position CT11 side in the direction.
- the extended end part EP11 may overlap with the extended end part EP12 in the X-axis direction.
- the space width SP1 of the wiring WR12 is connected to the end portion EP11 of the wiring WR11a and the shrink center position CT11 side in the Y-axis direction of the wiring WR11a and connected to the wiring WR11 adjacent to the wiring WR11a.
- the space width SP1 is equal to or larger than the minimum space width in consideration of the mask size effect or the OPC process in the first wiring layer ML1.
- the pattern as the connection wiring CW1 is arranged by simply extending at least one of the wiring WR11 and the wiring WR12. Compared to the first embodiment, a pattern as the connection wiring CW1 can be easily created.
- each of the wiring WR11 and the wiring WR12 may not have a rectangular shape in plan view.
- FIG. 31 is a plan view showing still another example of the wiring layout of the first wiring layer in the first modification of the first embodiment.
- the wiring WR11 includes an end EP11 on the region AW12 side, and an extension EX11 that is connected to the end EP11 and extends in the X-axis direction, and the Y-axis of the end EP11.
- the width WD11 in the direction may be equal to or greater than the width WD13 in the Y-axis direction of the extending part EX11.
- the wiring WR12 has an end EP12 on the region AW11 side, and an extension EX12 connected to the end EP12 and extending in the X-axis direction, and the width WD12 of the end EP12 in the Y-axis direction is The width WD14 or more in the Y-axis direction of the extension part EX12 may be sufficient.
- the end portion EP11 and the end portion EP12 can be connected by extending at least one of the end portion EP11 and the end portion EP12. Therefore, the same effects as those shown in FIGS. 27 to 30 can be obtained.
- FIG. 32 is a plan view showing a wiring layout of the first wiring layer in the second modification of the first embodiment.
- connection wiring CW1a among the plurality of connection wirings CW1 is connected to the wiring WR11a among the plurality of wirings WR11, and is connected to the wiring WR12a among the plurality of wirings WR12. It is assumed that Further, the wiring WR11a is shifted to the shrink center position CT11 side in the Y-axis direction from the wiring WR12a.
- the width WC1 of the connection wiring CW1a in the Y-axis direction is narrower than both the width of the wiring WR11a in the Y-axis direction and the width of the wiring WR12a in the Y-axis direction.
- the width WD11 of each wiring WR11 in the Y-axis direction is equal to each other
- the width WD12 of each wiring WR12 in the Y-axis direction is equal to each other
- the width WD11 is narrower than the width WD12
- the Y of each connection wiring CW1 The width WC1 in the axial direction is not more than the width WD11.
- the side surface SW12 opposite to the shrink center position CT11 side in the Y-axis direction of the end EP11 of the wiring WR11 is the shrink center in the Y-axis direction of the end EP12 of the wiring WR12 in plan view. It is arranged on the side opposite to the shrink center position CT11 side in the Y-axis direction from the side surface SW21 on the position CT11 side.
- the side surface SC1 on the shrinking center position CT11 side in the Y-axis direction of the connection wiring CW1a and the side surface SW21 of the end portion EP12 form the same surface and are opposite to the shrinking center position CT11 side in the Y-axis direction of the connection wiring CW1a.
- the side surface SC2 and the side surface SW12 of the end portion EP11 form the same surface.
- the wiring WR11a is the wiring WR11 arranged on the negative side in the Y-axis direction from the shrink center position CT11.
- the coordinates of the corner formed by the positive side surface in the X-axis direction of the end portion EP12 of the wiring WR12a and the positive side surface SW21 in the Y-axis direction of the end portion EP12 of the wiring WR12a are expressed as (Xp1, Yp1).
- the coordinates of the corner formed by the positive side surface in the X-axis direction of the end portion EP12 of the wiring WR12a and the negative side surface SW22 in the Y-axis direction of the end portion EP12 of the wiring WR12a are expressed as (Xp2, Yp2).
- the coordinates of the corner formed by the negative side surface in the X-axis direction of the end portion EP11 of the wiring WR11a and the positive side surface SW11 in the Y-axis direction of the end portion EP11 of the wiring WR11a are (Xp3, Yp3). To do.
- the coordinates of the corner formed by the negative side surface in the X-axis direction of the end portion EP11 of the wiring WR11a and the negative side surface SW12 in the Y-axis direction of the end portion EP11 of the wiring WR11a are (Xp4, Yp4). To do.
- the minimum line width considering the mask size effect or the OPC process of the first wiring layer ML1 is defined as a width W00
- the shrink rate which is a reduction factor of the shrink process in the first wiring layer ML1
- ⁇ is defined as ⁇ .
- the wiring WR11 is arranged so that the width WD11 of the wiring WR11 is equal to or larger than the width W1 defined by the above formula (1).
- a rectangular shape is formed such that the upper left coordinates of the connection wiring CW1 are (Xp1, Yp1) and the lower right coordinates are (Xp4, Yp4). generate.
- Yp1 and Yp4 are represented by the following formula (2) and the following formula (3).
- (2) Yp4 ⁇ ⁇ Yp2 (3) If the minimum value of the width WC1 of the connection wiring CW1 is the width YW, the width YW is expressed by the following formula (4).
- ⁇ Yp2 W00 + Yp2 +
- Yp2 is a negative value
- have opposite polarities
- ⁇ Yp2 are each canceled, so the width YW finally becomes It becomes equal to the width W00.
- the calculation for creating the pattern as the connection wiring CW1 can be easily performed, and the same effect as the first embodiment is obtained.
- the width WD11 of the end portion EP11 of the wiring WR11 arranged in the cut-out area AW13 may be set to be equal to or larger than the determined maximum value W1max of the width W1. Even in this case, the same effect as the second modification can be obtained.
- each of the wiring WR11 and the wiring WR12 may not have a rectangular shape in plan view.
- FIG. 33 is a plan view showing another example of the wiring layout of the first wiring layer in the second modification of the first embodiment.
- the wiring WR11 has an end EP11 on the region AW12 side, and an extension EX11 connected to the end EP11 and extending in the X-axis direction, and the Y-axis of the end EP11.
- the width WD11 in the direction may be equal to or greater than the width WD13 in the Y-axis direction of the extending part EX11.
- the wiring WR12 has an end EP12 on the region AW11 side, and an extension EX12 connected to the end EP12 and extending in the X-axis direction, and the width WD12 of the end EP12 in the Y-axis direction is The width WD14 or more in the Y-axis direction of the extension part EX12 may be sufficient.
- connection wiring CW1 are formed in a rectangular shape by the same design method as described with reference to FIGS. 11 to 16, as in the case shown in FIG. A pattern as the connection wiring CW1 having can be easily created, and the same effect as the case shown in FIG. 32 can be obtained.
- FIG. 34 is a plan view showing a wiring layout of the first wiring layer in the third modification of the first embodiment.
- 35 and 36 are plan views showing another example of the wiring layout of the first wiring layer in the third modification of the first embodiment.
- connection wiring CW1 includes an extension part CW11, an extension part CW12, and a connection part CW13.
- the extending portion CW11 is formed continuously with the end portion EP11 on the region AW12 side of the wiring WR11, and extends in the X-axis direction.
- the extending portion CW12 is formed continuously with the end portion EP12 on the region AW11 side of the wiring WR12, and extends in the X-axis direction.
- the connecting part CW13 extends in the Y-axis direction and is connected to both the extending part CW11 and the extending part CW12.
- connection wiring CW1a among the plurality of connection wirings CW1 is connected to the wiring WR11a among the plurality of wirings WR11 and connected to the wiring WR12a among the plurality of wirings WR12. Further, the wiring WR11a is disposed away from the wiring WR12a toward the shrink center position CT11 in the Y-axis direction.
- the side surface SC11 on the shrink center position CT11 side in the Y-axis direction of the extending portion CW11 of the connection wiring CW1a forms the same surface as the side surface SW11 on the shrink center position CT11 side in the Y-axis direction of the end portion EP11 of the wiring WR11a. is doing. Further, the side surface SC12 of the extending part CW11 of the connection wiring CW1a opposite to the shrink center position CT11 side in the Y-axis direction is the opposite side of the end part EP11 of the wiring WR11a to the shrink center position CT11 side in the Y-axis direction. The side surface SW12 and the same surface are formed.
- the side surface SC21 of the extension portion CW12 of the connection wiring CW1a on the shrink center position CT11 side in the Y-axis direction forms the same surface as the side surface SW21 of the end portion EP12 of the wiring WR12a on the shrink center position CT11 side in the Y-axis direction. is doing. Further, the side surface SC22 of the extension part CW12 of the connection wiring CW1a opposite to the shrink center position CT11 side in the Y-axis direction is the opposite side of the end part EP12 of the wiring WR12a to the shrink center position CT11 side in the Y-axis direction. The side surface SW22 and the same surface are formed.
- the side surface SC31 on the shrink center position CT11 side in the Y-axis direction of the connection portion CW13 of the connection wiring CW1a forms the same surface as the side surface SC11 of the extension portion CW11 of the connection wiring CW1a.
- a side surface SC32 of the connection portion CW13 of the connection wiring CW1a opposite to the shrink center position CT11 side in the Y-axis direction forms the same surface as the side surface SC22 of the extension portion CW12 of the connection wiring CW1a.
- the wiring WR11a is disposed away from the wiring WR12a toward the shrink center position CT11 in the Y-axis direction. Therefore, the side surface SW12 of the end portion EP11 of the wiring WR11a opposite to the shrink center position CT11 side in the Y-axis direction is more than the side surface SW21 of the end portion EP12 of the wiring WR12a on the shrink center position CT11 side in the Y-axis direction. It is arranged on the shrink center position CT11 side in the Y-axis direction.
- the side surface SC12 of the extending part CW11 of the connection wiring CW1a is arranged closer to the shrink center position CT11 in the Y-axis direction than the side surface SC21 of the extending part CW12 of the connection wiring CW1a.
- the width in the X-axis direction of the connecting portion CW13 can be the width W00.
- a pattern as the extended portion CW11 is created by extending the wiring WR11 to the gap region AW14
- a pattern as the extended portion CW12 is created by extending the wiring WR12 to the gap region AW14.
- the pattern as the connection part CW13 which connects the extension part CW11 and the extension part CW12 can be produced by the calculation similar to Embodiment 1.
- the space width SP1 between two connection wirings CW1 adjacent in the Y-axis direction takes into account the mask size effect or the OPC process in the first wiring layer ML1. It is more than the minimum space width.
- the pattern as the connection wiring CW1 is arranged by simply extending at least one of the wiring WR11 and the wiring WR12. Compared to the first embodiment, a pattern as the connection wiring CW1 can be easily created.
- the position in the X-axis direction of the connecting portion CW13 may not be the central position in the X-axis direction between the area AW11 and the area AW12. Even in such a case, the same effect as the example shown in FIG. 34 is obtained.
- the position of the connection portion CW13 in the X-axis direction may be different among the plurality of connection wirings CW1.
- the position of the connection portion CW13 in the X-axis direction differs between the two connection wirings CW1 adjacent in the Y-axis direction.
- the space portion between the two connection wirings CW1 is not sandwiched by the connection portion CW13 on both sides in the Y-axis direction. Therefore, the exposure margin, which is the ratio of the wiring width to the processing accuracy by exposure, can be improved.
- FIG. 37 is a plan view showing a wiring layout of the first wiring layer in the fourth modification of the first embodiment.
- FIG. 38 is a plan view showing another example of the wiring layout of the first wiring layer in the fourth modification example of the first embodiment.
- connection wiring CW1 that connects the end EP11 on the area AW12 side of the wiring WR11 and the end EP12 on the area AW11 side of the wiring WR12 is linear, for example, in a direction inclined from the X-axis direction.
- the positive side surface SC1 in the Y-axis direction of the connection wiring CW1 is the positive side surface SW11 in the Y-axis direction of the wiring WR11. Both of the side surfaces SW21 on the positive side in the Y-axis direction of WR12 are continuous.
- the negative side surface SC2 in the Y-axis direction of the connection wiring CW1 is the negative side surface SW12 in the Y-axis direction of the wiring WR11, and the wiring Both of the negative side surfaces SW22 in the Y-axis direction of WR12 are continuous.
- the coordinates of the corner formed by the side surface on the positive side in the X-axis direction of the end portion EP12 of the wiring WR12 and the side surface SW21 on the positive side in the Y-axis direction of the end portion EP12 of the wiring WR12. Is (Xp1, Yp1). Further, the coordinates of the corner formed by the side surface on the positive side in the X-axis direction of the end portion EP12 of the wiring WR12 and the side surface SW22 on the negative side in the Y-axis direction of the end portion EP12 of the wiring WR12 are expressed as (Xp2, Yp2).
- the coordinates of the corner formed by the negative side surface in the X-axis direction of the end portion EP11 of the wiring WR11 and the positive side surface SW11 in the Y-axis direction of the end portion EP11 of the wiring WR11 are expressed as (Xp3, Yp3). Further, the coordinates of the corner formed by the negative side surface in the X-axis direction of the end portion EP11 of the wiring WR11 and the negative side surface SW12 in the Y-axis direction of the end portion EP11 of the wiring WR11 are expressed as (Xp4, Yp4).
- the fourth modification when the gap portion mask data is created, the above-described coordinates (Xp1, Yp1), (Xp2, Yp2), (Xp3, Yp3) and (Xp4, Yp4) are used as the pattern as the connection wiring CW1.
- a pattern consisting of a quadrilateral with the four points as vertices is generated by calculation.
- the fourth modification example unlike the first embodiment, although the coordinates of four points are used, the calculation for creating the pattern as the connection wiring CW1 can be easily performed. The effect is substantially the same as in the first mode.
- connection wiring CW1 may include an extension part CW11, an extension part CW12, and a connection part CW13.
- the extending portion CW11 is formed continuously with the end portion EP11 on the region AW12 side of the wiring WR11, and extends in the X-axis direction.
- the extending portion CW12 is formed continuously with the end portion EP12 on the region AW11 side of the wiring WR12, and extends in the X-axis direction.
- the connecting portion CW13 that connects the end portion of the extending portion CW11 on the region AW12 side and the end portion of the extending portion CW12 on the region AW11 side extends in a straight line, for example, in a direction inclined from the X-axis direction.
- the pattern as the extension part CW11 is formed by extending the wiring WR11 to the gap area AW14
- the pattern as the extension part CW12 is formed by extending the wiring WR12 to the gap area AW14.
- the pattern as the connection part CW13 can be created by the same calculation as the example shown in FIG. Accordingly, the connection portion CW13 has the same effect as the example shown in FIG. 37 in that a pattern made of a quadrilateral having four points as vertices is created.
- the example shown in FIG. 38 has substantially the same configuration as the example shown in FIG. 34 in the third modification of the first embodiment, except that the connecting portion CW13 is parallel to the Y axis.
- the example shown in FIG. 34 has substantially the same effect.
- the wiring WR11 arranged in the region AW11 subjected to the shrink processing is subjected to the shrink processing via the connection wiring CW1 formed in the same layer as the wiring WR11. It was connected to the wiring WR12 arranged in the same layer in the area AW12 other than the broken area AW11.
- the wiring WR21 arranged in the region AW21 where the shrink region is performed is connected via the connection wiring CW1 formed in a layer different from the wiring WR21.
- it is connected to the wiring WR22 arranged in the same layer in the area AW22 other than the area AW21 subjected to the shrink process.
- the configuration of the semiconductor device of the second embodiment is the same as the configuration of the semiconductor device of the first embodiment described with reference to FIGS. 1 to 3, and the description thereof is omitted.
- the method for manufacturing the semiconductor device according to the second embodiment is the same as the method for manufacturing the semiconductor device according to the first embodiment described with reference to FIGS. 18 to 24, and the description thereof is omitted.
- FIG. 40 is an enlarged plan view of region RG2 in FIG.
- the second wiring layer ML2 has a plurality of wirings WR21 and a plurality of wirings WR22.
- the plurality of wirings WR21 are regions AW21 on the upper surface as the main surface of the semiconductor substrate SB (see FIG. 3), and are formed in the same layer in the second wiring layer ML2.
- the plurality of wirings WR22 are formed in the same layer as the plurality of wirings WR21 in the upper surface region AW22 as the main surface of the semiconductor substrate SB (see FIG. 3).
- the region AW22 is a region on one side of the region AW21 in the X-axis direction in plan view.
- a plurality of pixels PU are formed in the region AW21, and a peripheral circuit is formed in the region AW22.
- the plurality of wirings WR21 extend in the X-axis direction in a plan view in the area AW21 and are arranged at a pitch PT21 in the Y-axis direction.
- the plurality of wirings WR22 extend in the X-axis direction in the area AW22 in a plan view, and are arranged at a pitch PT22 in the Y-axis direction.
- the first wiring layer ML1 (see FIG. 3) has a plurality of connection wirings CW1 shown in FIG.
- the plurality of wirings WR21 are respectively connected to the plurality of wirings WR22 via each of the plurality of connection wirings CW1. With such an arrangement, the plurality of wirings WR21 are electrically connected to each of the plurality of wirings WR22.
- the plurality of wirings WR22 are connected to, for example, transistors included in the peripheral circuit. Therefore, the plurality of wirings WR21 are connected to the peripheral circuit via each of the plurality of wirings WR22.
- the pitch PT21 is smaller than the pitch PT22.
- the interval between the two adjacent wires WR21 is set to the distance between the two adjacent wires WR22 in the region AW22 in which the peripheral circuit is formed. It can be made shorter than the interval between them.
- the width WD21 in the Y-axis direction of the end portion EP21 on the region AW22 side of each wiring WR21 is the wiring WR22 connected to each wiring WR21 among the plurality of wirings WR22.
- the end portion EP22 on the side of the region AW21 is narrower than the width WD22 in the Y-axis direction.
- a portion of the mask data DAT2 that is arranged in the area AW23 is cut out, and the position within the cut-out portion (shrink center position) with respect to the cut-out portion. ) After performing reduction processing centering on CT21, it is pasted again on the original mask data DAT2. Thereby, mask data DAT2a having a plurality of wirings WR21 and a plurality of wirings WR22 can be easily created.
- any one of the plurality of wirings WR21 is more in the Y-axis direction than the wiring WR22 connected to any one of the plurality of wirings WR22 in plan view. It will be shifted to the shrink center position CT21 side.
- the wiring WR21 arranged at the negative end in the Y-axis direction of the arrangement of the plurality of wirings WR21 is connected to the wiring WR21 among the plurality of wirings WR22 in plan view.
- the wiring WR22 is shifted from the positive side in the Y-axis direction.
- the width WD21 of each wiring WR21 may be narrower than the width WD22 of each wiring WR22.
- the plurality of connection wirings CW1 are formed in a different layer from the plurality of wirings WR21.
- the plurality of connection wirings CW1 are formed in the first wiring layer ML1 lower than the second wiring layer ML2 in which the plurality of wirings WR21 are formed.
- the plurality of connection wirings CW1 extend in the X-axis direction in a plan view and are arranged at a pitch PT23 in the Y-axis direction.
- the pitch PT23 can be made equal to the pitch PT22, for example.
- a plurality of vias VA1 as electrodes are formed in the same layer.
- a plurality of vias VA2 as electrodes are formed in the same layer.
- the plurality of wirings WR21 are electrically connected to the plurality of connection wirings CW1 through the plurality of vias VA1, respectively.
- the plurality of wirings WR22 are electrically connected to the plurality of connection wirings CW1 through the plurality of vias VA2, respectively.
- the plurality of vias VA1 are arranged at a pitch PTV1 in the Y-axis direction in a plan view, and the plurality of vias VA2 are arranged at a pitch PTV2 in the Y-axis direction in a plan view. Both pitch PTV1 and PTV2 can be equal to pitch PT22.
- the second wiring layer ML2 has a plurality of terminal portions PD2.
- Each of the plurality of terminal portions PD2 is formed in the same layer as the plurality of wirings WR21 in the region AW21.
- Each terminal portion PD2 is connected to an end portion EP21 on the region AW22 side of each wiring WR21.
- Each terminal portion PD2 overlaps with each connection wiring CW1 in plan view, and each via VA1 is included in each terminal portion PD2 in a portion overlapping with each connection wiring CW1 in plan view. Thereby, each terminal part PD2 can be reliably electrically connected to each connection wiring CW1 via each via VA1.
- the width in the Y-axis direction of the terminal portion PD2 connected to the wiring WR21 arranged at the center of the array of the plurality of wirings WR21 is a plurality of the terminal portions PD2.
- the width of the terminal part PD2 connected to the wiring WR21 arranged at the end of the arrangement of the wirings WR21 is narrower than the width in the Y-axis direction.
- the wiring layout in the second wiring layer ML2 can be designed by the same method as the wiring layout designing method in the first wiring layer ML1 described in the first embodiment.
- the wiring layout design method in 2 will be described with a focus on differences from the wiring layout design method in the first embodiment.
- the wiring layout in the uppermost wiring layer ML3 in the second embodiment can be designed by the same method as the wiring layout designing method in the uppermost wiring layer ML3 in the first embodiment.
- the exposure mask in the second embodiment can be manufactured in the same manner as the exposure mask in the first embodiment.
- 41 to 45 are plan views showing wiring layout data of the second wiring layer in the second embodiment.
- the same process as step S1 in FIG. 11 is performed to create mask data as shown in FIGS.
- the layout data in the second wiring layer ML2 is subjected to a correction process referred to as a so-called OPC process to prepare mask data DAT2 as pattern data for the second wiring layer ML2.
- the mask data DAT2 has a region AR1 that is a partial region of the plane FS and a region AR2 that is a partial region of the plane FS.
- the plurality of pixels PU are arranged in a region AW23 that is a partial region of the region AR1 as a pixel region.
- a region other than the region AW23 in the region AR1 and the region AR2 is referred to as a region AW22.
- FIG. 41 shows a wiring layout before the wiring layout shown in the plan view of FIG. 39 is created by shrink processing
- FIG. 42 shows the wiring before the wiring layout shown in the plan view of FIG. 40 is created by shrink processing. Show the layout.
- a plurality of wirings (wiring patterns) WR21 are arranged in the area AR1.
- the plurality of wirings WR21 extend in the X-axis direction and are arranged at a pitch PT22 in the Y-axis direction.
- a plurality of wirings (wiring patterns) WR22 are arranged in the area AR2.
- the plurality of wirings WR22 extend in the X-axis direction and are arranged with PT22 in the Y-axis direction.
- the mask data DAT2 extends in the area AW23 in the X-axis direction, and is arranged in the Y-direction with a plurality of wirings (wiring patterns) WR21 arranged at the pitch PT22 and in the area AW22 in the X-axis direction.
- a plurality of wirings (wiring patterns) WR22 extending in the Y-axis direction and arranged at a pitch PT22.
- step S2 in FIG. 11 the same process as step S2 in FIG. 11 is performed to cut out partial mask data as shown in FIG.
- the partial mask data DAT23 as pattern data which is composed of the portion arranged in the area AW23, is cut out from the mask data DAT2 of the second wiring layer ML2.
- step S3 in FIG. 11 the same process as step S3 in FIG. 11 is performed to perform a shrink process as shown in FIG.
- the cut-out partial mask data DAT23 is subjected to a reduction process, that is, a shrink process, which is reduced at a constant magnification around the position CT21 in the partial mask data DAT23.
- reduced partial mask data DAT21 is created as pattern data, each consisting of reduced wiring (wiring pattern) WR21.
- the plurality of wirings WR21 extend in the X-axis direction and are arranged at a pitch PT21 in the Y-axis direction.
- the pitch PT21 is smaller than the pitch PT22.
- the terminal portion PD2 before the shrink process is performed protrudes from the region where the via VA1 is disposed by a distance Xmargin on the opposite side to the shrink center position CT21 side in the X-axis direction. Further, the terminal portion PD2 before the shrink process is performed protrudes from the region where the via VA1 is disposed by a distance Ymargin on the side opposite to the shrink center position CT21 side in the Y-axis direction.
- the shrink rate which is the reduction ratio of the shrink process in the second wiring layer ML2
- the center coordinates of the via VA1 with respect to the shrink center position CT21 are (Xv, Yv).
- the width in the X-axis direction and the Y-axis direction of the via VA1 (the diameter when the via VA1 has a circular shape) is defined as a width V1, and an allowable deviation amount of the position of the via VA1 with respect to the second wiring layer ML2; That is, the margin of deviation is set as margin ⁇ .
- the distance Xmargin and the distance Ymagrin are defined by the following formula (5) and the following formula (6).
- the minimum line width in consideration of the mask size effect or the OPC process of the second wiring layer ML2 is defined as a width W0.
- the length in the X-axis direction of the terminal portion PD2 (see FIG. 40) after the shrink process is equal to or greater than (W0 + ⁇ ⁇ (Xmargin + ⁇ )), and the width in the Y-axis direction is (W0 + ⁇ ⁇ (Ymargin + ⁇ )). ) Or more.
- the minimum line width is set as the width W0, and the minimum space width is set as the space width S0.
- the pattern as the wiring WR21 before the shrink processing is performed has the line width Wshrink defined by the following formula (7) as the minimum line width and the space width Sshrink defined by the following formula (8) as the minimum space width. As arranged.
- step S4 in FIG. 11 the same process as step S4 in FIG. 11 is performed to paste the reduced partial mask data as shown in FIG.
- the reduced partial mask data DAT21 is an area in the area AW23 of the plane FS so that the position CT21 in the reduced partial mask data DAT21 has the same coordinates as the position CT22 in the area AW23 (see FIG. 43). Therefore, it is pasted on the area AW21 which is an area away from the area AW22.
- the area between the area AW21 and the area AW22 is a gap area AW24 in which no mask data is created.
- mask data DAT2a as pattern data having reduced partial mask data DAT21 and mask data DAT2 is created.
- step S5 in FIG. 11 may not be performed. Further, no connection wiring is formed in the gap area AW24.
- FIG. 46 is a plan view showing the wiring layout data of the second wiring layer in the second embodiment superimposed on the wiring layout data of the first wiring layer.
- the first wiring layer ML1 includes a plurality of wirings WR11 that respectively extend in the Y-axis direction and are arranged in the X-axis direction.
- the shrink process is not performed on the connection wiring CW1 and the vias VA1 and VA2 included in the first wiring layer ML1 which is the lower wiring layer. Therefore, as shown in FIG. 46, when the region AW23 in which the plurality of pixels PU are arranged is cut out in the second wiring layer ML2, the region AW23 is more than the region AW13 cut out in the first wiring layer ML1. Is also big.
- any position in the region AW23 including the plurality of pixels PU is set. Shrink processing is performed at the center. Therefore, also in the second embodiment, in the second layer wiring layer ML2, which is a wiring layer other than the uppermost wiring layer ML3, the pitch of the wiring WR21 arranged in the region AW21 in the region AW23 is different from the region AW23. The pitch is smaller than the pitch of the wiring WR22 arranged in the area AW22 which is a different area.
- the light incident on each pixel PU is converted into the wiring layer above the semiconductor substrate SB only by performing the shrink process on the opening OP1 of the light shielding film SF1. And since it is reflected by the wiring contained in the wiring layer of a layer different from light shielding film SF1, it is difficult to prevent or suppress shading. Therefore, the sensitivity of the CMOS image sensor is lowered, and the performance of the semiconductor device is lowered.
- the shrink process is performed on the mask data of the second wiring layer ML2 around the position in the region where the plurality of pixels PU are arranged. .
- the pitch of the wiring WR21 can be made smaller than the pitch of the wiring WR22, and shading by the second wiring layer ML2 can be prevented or suppressed. Therefore, the sensitivity of the CMOS image sensor can be improved and the performance of the semiconductor device can be improved.
- the outer periphery of the region AW23 from which the partial mask data DAT23 is cut out does not cross any of the plurality of wirings WR21 and the plurality of wirings WR22. Therefore, it is not necessary to create partial mask data in the gap area AW24, and the wiring WR21 and the wiring WR22 are calculated between the area AW21 and the area AW22 in consideration of the difference in the pitch of the wiring WR21 before and after the shrink process. Can be connected without.
- the shrink process is performed. Thereafter, the wiring WR21 is reliably electrically connected to the via VA1. Therefore, when verifying whether or not the wiring WR21 is electrically connected to the via VA1 when creating the chip layout data, after shrink processing is performed, the reduced partial mask data DAT21 is pasted. In addition, after creating the mask data DAT2a, it is not necessary to perform verification again.
- the minimum line width in the area AW21 after the shrink process is performed is the line width Wshrink (see the above formula (7)), and the minimum space width in the area AW21 after the shrink process is performed is the space The width is Sshlink (see the above formula (8)). Therefore, even after the shrink process is performed, the plurality of wirings WR21 can be arranged so as to ensure the minimum line width and the minimum space width in the second wiring layer ML2.
- shrink process may be performed on the wiring layers other than the second wiring layer ML2, and the shrink process may be performed on the p-type semiconductor layer PW, the n-type semiconductor layer NW, or the gate electrode GE. Good.
- shrink rate alpha
- shrink rate can also be made into the same value, and it can also adjust so that it may become a different value.
- the region AW23 to be cut out has a rectangular shape
- the wiring WR21 and the wiring WR22 are portions of the region AW21 between the negative end in the X-axis direction and the region AW22.
- An example of connection in the gap area AW24 has been described.
- the area AW23 to be cut out does not have to have a rectangular shape.
- the wiring WR21 and the wiring WR22 may be connected by a gap region AW24 in a portion between the positive end of the region AW21 in the X-axis direction and the region AW22.
- the wiring WR21 and the wiring WR22 may be connected by a gap area AW24 in a portion between the area AW22 and the positive or negative end of the area AW21 in the Y-axis direction. In either case, the same effect as in the second embodiment can be obtained.
- 47 and 48 are plan views showing the wiring layout of the second wiring layer in the first modification of the second embodiment. 47 shows the arrangement after the shrink process is performed, and FIG. 48 shows the arrangement before the shrink process is performed.
- the plurality of vias VA1 are subjected to shrink processing at a shrink rate equal to the shrink rate of the plurality of wirings WR21. Therefore, as shown in FIG. 47, the pitch PTV1 of the arrangement of the plurality of vias VA1 in the Y-axis direction can be made equal to the pitch PT21 of the arrangement of the plurality of wirings WR21 in the Y-axis direction. At this time, the pitch PTV1 is smaller than the pitch PT22 of the arrangement of the plurality of wirings WR21 in the Y-axis direction. Note that the pitch PTV2 of the array of vias VA2 can be equal to the pitch PT22 of the array of the plurality of wirings WR22 in the Y-axis direction.
- the first wiring layer ML1 has a plurality of terminal portions PC1.
- the plurality of terminal portions PC1 are formed in the same layer as the plurality of connection wirings CW1.
- Each terminal portion PC1 is connected to the end portion on the region AW21 side of each connection wiring CW1.
- the width in the X-axis direction and the Y-axis direction of the via VA1 before the shrink process is performed is defined as a width V1 ′.
- the width V1 ′ is defined by the following formula (9).
- V1 ′ 1 / ⁇ ⁇ V1 (9)
- the terminal portion PC1 before performing the shrink process protrudes from the region where the via VA1 is disposed by the distance Xmargin2 toward the shrink center position CT21 in the X-axis direction.
- the terminal portion PC1 before the shrink process is performed protrudes from the region where the via VA1 is disposed by the distance Ymargin2 toward the shrink center position CT21 in the Y-axis direction.
- the distance Xmargin2 and the distance Ymagrin2 are defined by the following formula (10) and the following formula (11).
- the margin ⁇ ′ is an allowable deviation amount of the position of the via VA1 with respect to the second wiring layer ML2, that is, a margin of the deviation amount.
- FIG. 49 is a plan view showing the wiring layout data of the second wiring layer in the first modification of the second embodiment superimposed on the wiring layout data of the first wiring layer.
- the first wiring layer ML1 includes a plurality of wirings WR11 that extend in the Y-axis direction and are arranged in the X-axis direction.
- the via VA1 is subjected to shrink processing at the same shrink rate as the wiring WR21. Therefore, in the layer from which the via VA1 is cut out, when a region AWV that is a region in which a plurality of pixels PU are arranged is cut out, the region AWV is a region cut out in the second wiring layer ML2, as shown in FIG. It is the same size as AW23.
- the via VA1 formed below the second wiring layer ML2 also has a shrinkage rate equal to the shrinkage rate in the second wiring layer ML2. Shrink processing is performed. However, even when the mask size effect or the OPC process in the second wiring layer ML2 is not taken into consideration and the margin ⁇ ′ is equal to 0, the via VA1 after the shrink process is performed in plan view It is included in the end EP21. Further, the width V1 ′ in the X-axis direction and the Y-axis direction of the via VA1 before the shrink process is performed is a width considering the shrink process. Therefore, the first modification has the same effects as those of the second embodiment while improving the degree of design freedom.
- FIG. 50 and 51 are plan views showing other examples of the wiring layout of the second wiring layer in the first modification of the second embodiment.
- FIG. 50 shows an arrangement after the shrink process is performed
- FIG. 51 shows an arrangement before the shrink process is performed.
- the terminal part PD2 and the terminal part PC1 are arranged.
- the shrink rate of the plurality of wirings WR21 is the shrink rate ⁇ M2
- the shrink process is performed on the plurality of vias VA1 at a shrink rate ⁇ V1 larger than the shrink rate ⁇ M2. Therefore, as shown in FIG. 50, the pitch PTV1 of the arrangement of the plurality of vias VA1 in the Y-axis direction is larger than the pitch PT21 of the arrangement of the plurality of wirings WR21 in the Y-axis direction, and the plurality of wirings in the Y-axis direction. It can be made smaller than the pitch PT22 of the WR22 array.
- the shrink rate ⁇ V1 can be set to 0.995, for example, and the shrink rate ⁇ M2 can be set to 0.99, for example.
- the terminal portion PD2 before the shrink process is performed protrudes by a distance Xmargin ′ on the opposite side to the shrink center position CT21 side in the X-axis direction with respect to the region where the via VA1 is disposed. . Further, the terminal portion PD2 before the shrink process is performed protrudes from the region where the via VA1 is disposed by a distance Ymargin ′ on the side opposite to the shrink center position CT21 side in the Y-axis direction. On the other hand, the terminal portion PC1 before the shrink process is performed protrudes from the region where the via VA1 is disposed by the distance Xmargin2 ′ toward the shrink center position CT21 in the X-axis direction. Further, the terminal portion PC1 before the shrink process is performed protrudes from the region where the via VA1 is disposed by the distance Ymargin2 ′ toward the shrink center position CT21 in the Y-axis direction.
- FIGS. 50 and 51 also has the same effect as the example shown in FIGS. 47 and 48.
- the wiring formed in the lower wiring layer on the pixel region side is connected to the lower layer on the peripheral circuit region side via the connection wiring formed in the upper wiring layer than the lower wiring layer. It is electrically connected to the wiring arranged in the wiring layer.
- FIG. 52 is a plan view showing the wiring layout of the first wiring layer in the second modification of the second embodiment, superimposed on the wiring layout data of the second wiring layer.
- 53 and 54 are plan views showing the wiring layout of the first wiring layer in the second modification of the second embodiment.
- FIG. 53 shows an arrangement after the shrink process is performed
- FIG. 54 shows an arrangement before the shrink process is performed.
- the first wiring layer ML1 includes a plurality of wirings WR11 and a plurality of wirings WR12.
- the plurality of wirings WR11 are regions AW11 that are regions in which the plurality of pixels PU are arranged, extend in the X-axis direction, and are arranged in the Y-axis direction.
- the plurality of wirings WR12 are regions AW12 that are regions different from the region AW11, extend in the X-axis direction, and are arranged in the Y-axis direction.
- the plurality of wirings WR11 are electrically connected to each of the plurality of wirings WR12 via each of the plurality of connection wirings CW2 formed in the second wiring layer ML2 that is higher than the first wiring layer ML1. It is connected.
- the plurality of connection wires CW2 extend in the X-axis direction and are arranged in the Y-axis direction.
- the second wiring layer ML2 includes a plurality of wirings WR21 extending in the Y-axis direction and arranged in the X-axis direction.
- the region AW13 is formed in the second wiring layer ML2. It is larger than the area AW23 to be cut out.
- the shrink processing is performed on the plurality of wirings WR11 included in the first wiring layer ML1, but the plurality of connection wirings included in the second wiring layer ML2 is performed. Shrink processing is not performed for CW2 and via VA1 formed in a layer between the plurality of wirings WR11 and the plurality of connection wirings CW2.
- the relationship between the first wiring layer ML1 and the second wiring layer ML2 is the same as the first wiring layer ML1 in the example shown in FIGS. This is the reverse of the relationship with the second wiring layer ML2.
- a plurality of wirings WR11, a plurality of terminal portions PD1 and A plurality of wirings WR12 are arranged.
- the plurality of wirings WR11, the plurality of terminal portions PD1, and the plurality of wirings WR12 are arranged in the first wiring layer ML1.
- the plurality of wirings WR11 are arranged at a pitch PT11 in the Y-axis direction in the region AW11, the plurality of wirings WR12 are arranged at the pitch PT12 in the region AW12, and the plurality of connection wirings CW1 are arranged in the Y-axis direction.
- Each of the plurality of terminal portions PD1 is connected to the end portion EP11 on the region AW12 side of the wiring WR11.
- the width WD11 of the end portion EP11 in the Y-axis direction is narrower than the width WD12 of the end portion EP12 on the region AW11 side of the wiring WR12 in the Y-axis direction.
- a plurality of connection wirings CW2 are arranged in place of the plurality of connection wirings CW1 in the examples shown in FIGS.
- the plurality of connection wirings CW1 are arranged in the second wiring layer ML2.
- the plurality of connection wirings CW2 are arranged with a pitch PT13 in the Y-axis direction.
- Each of the plurality of terminal portions PD1 is electrically connected to each of the plurality of connection wirings CW2 through each of the plurality of vias VA1.
- Each of the plurality of wirings WR12 is electrically connected to each of the plurality of connection wirings CW2 via each of the plurality of vias VA2.
- the terminal portion PD1 before the shrink process is performed protrudes from the region where the via VA1 is disposed by a distance Xmargin on the opposite side to the shrink center position CT11 side in the X-axis direction. Further, the terminal portion PD1 before performing the shrink process protrudes by a distance Ymargin on the opposite side to the shrink center position CT11 side in the Y-axis direction with respect to the region where the via VA1 is disposed.
- the example shown in FIGS. 53 and 54 also has the same effect as the example shown in FIGS. 40 and 42 in the second embodiment while improving the degree of freedom of design.
- FIGS. 55 and 56 are plan views showing other examples of the wiring layout of the first wiring layer in the second modification of the second embodiment.
- FIG. 55 shows an arrangement after the shrink process is performed
- FIG. 56 shows an arrangement before the shrink process is performed.
- the via VA1 formed in the layer between the plurality of wirings WR11 and the plurality of connection wirings CW2 is added to the plurality of wirings WR11 included in the first wiring layer ML1. Also for the shrink process. On the other hand, the shrink process is not performed on the plurality of connection wirings CW2 included in the second wiring layer ML2.
- the relationship between the first-layer wiring layer ML1 and the second-layer wiring layer ML2 is the same as the first-layer wiring layer ML1 in the example shown in FIGS. This is the reverse of the relationship with the second wiring layer ML2.
- a plurality of terminal portions PC2 are arranged instead of the plurality of terminal portions PC1 in the examples shown in FIGS.
- Each of the plurality of terminal portions PC2 is connected to an end portion on the region AW11 side of the connection wiring CW2.
- the plurality of terminal portions PC2 are electrically connected to the end portions EP11 on the region AW12 side of the plurality of wirings WR11 through the plurality of vias VA1, respectively.
- the terminal portion PC2 before the shrink process is performed protrudes from the region where the via VA1 is disposed by the distance Xmargin2 toward the shrink center position CT11 in the X-axis direction. Further, the terminal portion PC2 before the shrink process is performed protrudes from the region where the via VA1 is disposed by the distance Ymargin2 toward the shrink center position CT11 in the Y-axis direction.
- FIGS. 55 and 56 also has the same effect as the example shown in FIGS. 47 and 48.
- FIG. 57 and FIG. 58 are plan views showing other examples of the wiring layout of the first wiring layer in the second modification of the second embodiment.
- FIG. 57 shows the arrangement after the shrink process is performed
- FIG. 58 shows the arrangement before the shrink process is performed.
- the terminal part PD1 and the terminal part PC2 are arranged. That is, in the example shown in FIGS. 57 and 58, the relationship between the first wiring layer ML1 and the second wiring layer ML2 is the same as that of the first wiring layer ML1 in the example shown in FIGS. This is the reverse of the relationship with the second wiring layer ML2.
- the shrinkage rate of the plurality of vias VA1 is the shrinkage rate ⁇ V1
- the shrinkage rate ⁇ M1 larger than the shrinkage rate ⁇ V1 is included in the plurality of wirings WR11.
- shrink processing is performed. Therefore, as shown in FIG. 57, the pitch PT11 of the arrangement of the plurality of wirings WR11 in the Y-axis direction is larger than the pitch PTV1 of the arrangement of the plurality of vias VA1 in the Y-axis direction, and the plurality of wirings in the Y-axis direction. It can be made smaller than the pitch PT12 of the WR12 array.
- the shrink rate ⁇ V1 can be set to 0.99, for example, and the shrink rate ⁇ M1 can be set to 0.995, for example.
- the terminal portion PD1 before performing the shrink process protrudes from the region where the via VA1 is disposed by the distance Xmargin ′ toward the shrink center position CT11 in the X-axis direction. Further, the terminal part PD1 before the shrink process is performed protrudes from the region where the via VA1 is disposed by the distance Ymargin ′ toward the shrink center position CT11 in the Y-axis direction.
- the terminal portion PC2 before performing the shrink process protrudes from the region where the via VA1 is disposed by the distance Xmargin2 ′ toward the shrink center position CT11 in the X-axis direction. Further, the terminal portion PC2 before the shrink process is performed protrudes from the region where the via VA1 is disposed by the distance Ymargin2 ′ toward the shrink center position CT11 in the Y-axis direction.
- FIGS. 57 and 58 also has the same effect as the example shown in FIGS.
- each of the plurality of terminal portions PD2 can have the same shape.
- FIGS. 59 and 60 are plan views showing the wiring layout of the second wiring layer in the third modification of the second embodiment.
- FIG. 59 shows an arrangement after the shrink process is performed
- FIG. 60 shows an arrangement before the shrink process is performed.
- 59 and 60 are enlarged plan views of regions RG31, RG32, and RG33 in FIG. 59 and 60, for each of the wiring WR21, the wiring WR22, and the connection wiring CW1, the wiring disposed at the end on the positive side of the array in the Y-axis direction and the center of the array in the Y-axis direction.
- sequence in a Y-axis direction are shown.
- the terminal portion PD2 before the shrink process is performed is opposite to the shrink center position CT21 side in the X-axis direction with respect to the region where the via VA1 is disposed. Projected by a distance Xmargin on the side. Further, the terminal portion PD2 before the shrink process is performed protrudes by a distance Ymargin from the region where the via VA1 is disposed to the side opposite to the shrink center position CT21 side in the Y-axis direction.
- the shape of each of the plurality of terminal portions PD2 is between the plurality of terminal portions PD2. They were different from each other.
- the shapes of the plurality of terminal portions PD2 are the same among the plurality of terminal portions PD2.
- the plurality of terminal portions PD2 are electrically connected to each of the plurality of wirings WR21 and connected to each other through each of the plurality of vias VA1.
- Each of the wirings CW1 is electrically connected.
- the terminal portion PD2 includes a protruding portion PD21 that protrudes to the positive side in the Y-axis direction from the wiring WR21, and a wiring And a protrusion PD22 that protrudes more negatively in the Y-axis direction than WR21.
- the terminal part PD2 overlaps with the connection wiring CW1 in a plan view, and the via VA1 has a connection wiring CW1 in the plan view. Is included in the terminal portion PD2 of the overlapping portion.
- the center coordinates of the via VA1 arranged at the positive end of the array of the plurality of vias VA1 in the Y-axis direction with respect to the shrink center position CT21 are (Xv, Yvu ). Further, the center coordinates of the via VA1 arranged at the negative end of the array of the plurality of vias VA1 in the Y-axis direction with respect to the shrink center position CT21 are (Xv, Yvl).
- the protrusion PD21 included in each terminal portion PD2 protrudes from the region where the via VA1 is disposed by a distance Xmargin on the side opposite to the shrink center position CT21 side in the X-axis direction.
- the protruding portion PD21 included in each terminal portion PD2 protrudes by a distance Ymarginu on the positive side in the Y-axis direction with respect to the region where the via VA1 is disposed.
- the protruding portion PD22 included in each terminal portion PD2 protrudes by a distance Ymarginl on the negative side in the Y-axis direction with respect to the region where the via VA1 is disposed.
- each of the distance Xmargin, the distance Ymagrinu, and the distance Ymarginl is set to a value equal to or greater than the values defined by the following formulas (12) to (14).
- Xmargin (1 ⁇ ) / ⁇ ⁇ (
- Ymarginu (1 ⁇ ) / ⁇ ⁇ (
- Ymarginl (1 ⁇ ) / ⁇ ⁇ (
- the terminal part PD2 only needs to protrude by the distance Xmargin and the distance Ymargin described with reference to FIGS. 40 and 42 in the second embodiment.
- the distance Xmargin is determined for each terminal portion PD2 while checking the coordinates of the via VA1 corresponding to each terminal portion PD2 when creating mask data.
- the process of creating mask data becomes complicated. Therefore, as shown in FIGS. 59 and 60, in the entire region AW23 to be cut out, the maximum margin value of each terminal portion PD2, that is, the maximum value of the distance at which the terminal portion PD2 protrudes from the region where the via VA1 is disposed. And the terminal portion PD2 having the same shape and having a margin equal to or greater than the maximum value is arranged.
- FIG. 61 shows an example derived from the examples shown in FIG. 59 and FIG.
- FIG. 61 is a plan view showing another example of the wiring layout of the second wiring layer in the third modification of the second embodiment.
- FIG. 61 shows an arrangement before the shrink process is performed.
- the cut-out area AW23 is divided into five areas AW231 to AW235 in the Y-axis direction.
- distance Xmargin1 to distance Xmargin5 are set as the maximum value of distance Xmargin in each of region AW231 to region AW235
- distance Ymargin1 to distance Ymargin5 are set as the maximum value of distance Ymargin in each of region AW231 to region AW235.
- the terminal portions PD2 having the same shape and having a margin equal to or larger than the margins of the distance Ymargin1 to the distance Ymargin5 are arranged.
- the width in the Y-axis direction of the terminal portion PD2 connected to the wiring WR21 arranged at the center of the array of the plurality of wirings WR21 is the plurality of terminal portions PD2.
- the width of the terminal portion PD2 connected to the wiring WR21 arranged at the end of the array of the plurality of wirings WR21 is narrower than the width in the Y-axis direction.
- the area AW23 to be cut out is divided into, for example, a number that can be easily handled by the layout designer. For each of the divided areas, the maximum value of the margin of each terminal portion PD2 is calculated, and a margin equal to or larger than the maximum value is calculated.
- the terminal portion PD2 having the same shape is disposed. Thereby, even in the example shown in FIG. 61, the process of creating the mask data is made slightly simpler than the example shown in FIGS. 59 and 60, but simpler than that of the second embodiment. it can.
- FIG. 62 and 63 are plan views showing the wiring layout of the second wiring layer in the fourth modification of the second embodiment.
- FIG. 62 shows an arrangement after the shrink process is performed
- FIG. 63 shows an arrangement before the shrink process is performed.
- the pitch PTV1 of the arrangement of the plurality of vias VA1 in the Y-axis direction can be made larger than the pitch PT21 of the arrangement of the plurality of wirings WR21 in the Y-axis direction.
- the shrink process is performed on the plurality of connection wirings CW1 at a shrink rate ⁇ M1 larger than the shrink rate ⁇ V1. Therefore, as shown in FIG. 62, the pitch PT23 of the array of the plurality of connection wirings CW1 in the Y-axis direction is larger than the pitch PTV1 of the array of the plurality of vias VA1 in the Y-axis direction, and a plurality of pitches in the Y-axis direction. It can be made smaller than the pitch PT22 of the arrangement of the wirings WR22.
- the first wiring layer ML1 has a plurality of terminal portions PC1.
- the plurality of terminal portions PC1 are formed in the same layer as the plurality of connection wirings CW1.
- Each of the plurality of terminal portions PC1 is connected to an end portion on the region AW21 side of each of the plurality of connection wirings CW1.
- margins are set in consideration of the shrink ratios ⁇ M2, ⁇ V1, and ⁇ M1 in each of the wiring WR21, the via VA1, and the connection wiring CW1 when creating mask data.
- each of the plurality of wirings WR21 can be electrically connected to each of the plurality of connection wirings CW1 via each of the plurality of vias VA1.
- Each of WR22 can be electrically connected to each of a plurality of connection wirings CW2 through each of a plurality of vias VA2. Therefore, the example shown in FIGS. 62 and 63 also has the same effect as the example shown in FIGS. 40 and 42 in the second embodiment while improving the degree of design freedom.
- the fourth modification example is also applied to the first modification example of the second embodiment, the second modification example of the second embodiment, and the third modification example of the second embodiment. Similar modifications can be applied.
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Abstract
Description
以下、図面を参照しながら本実施の形態1の半導体装置としての撮像素子の構造および製造工程について詳細に説明する。本実施の形態1では、半導体装置としての撮像素子が、CMOSイメージセンサを備えている例について説明する。
まず、実施の形態1の半導体装置としての撮像素子の構成を説明する。
層間絶縁膜IL2および配線WR21上には、例えば炭素含有酸化ケイ素(SiOC)膜などからなる層間絶縁膜IL3が形成されている。
次に、配線層における配線レイアウトについて説明する。以下では、第1層の配線層ML1における配線レイアウトを例示して説明するが、例えば第2層など、第1層以外の層の配線層における配線レイアウトについても、同様にすることができる。
次に、配線層における配線レイアウトの設計方法を、露光用マスクの製造方法を含めて説明する。以下では、初めに、最上層の配線層における配線レイアウトの設計方法を説明した後、最上層より下層の配線層における配線レイアウトの設計方法を説明する。なお、配線層以外の各層のレイアウト、例えばチップレイアウトも、同様に設計することができる。
図5に示す例では、接続配線CW1のX軸方向における負側およびY軸方向における正側(図5中左上)の角部の座標が(Xp1、Yp3)となり、接続配線CW1のX軸方向における正側およびY軸方向における負側(図5中右下)の角部の座標が(Xp4、Yp2)となるような矩形形状を発生させる。これにより、矩形形状を有する接続配線(配線パターン)CW1を容易に作成することができる。
次に、本実施の形態1の半導体装置の製造方法について説明する。図18は、実施の形態1の半導体装置の製造工程の一部を示す製造プロセスフロー図である。図19~図24は、実施の形態1の半導体装置の製造工程中における要部断面図である。なお、図19~図24は、図3の断面図に対応した断面を示す。
次に、シェーディングについて、比較例の半導体装置と比較しながら説明する。図25は、比較例の半導体装置の構成を示す断面図である。図26は、比較例における第1層の配線層の配線レイアウトを示す平面図である。図25は、図1のB-B線に沿った断面図である。なお、図1のA-A線に沿った断面図は、図2と同様である。
本実施の形態1では、最上層の配線層ML3以外の配線層である第1層の配線層ML1のマスクデータを作成する際に、複数の画素PUを含む領域AW13内のいずれかの位置を中心としてシュリンク処理を行う。そのため、最上層の配線層ML3以外の配線層である第1層の配線層ML1において、領域AW13内の領域AW11に配置される配線WR11のピッチが、領域AW13とは異なる領域である領域AW12に配置される配線WR12のピッチよりも小さい。
次に、配線層における配線レイアウトおよびその設計方法の第1変形例について説明する。
次に、配線層における配線レイアウトおよびその設計方法の第2変形例について説明する。
=Yp2+W00+(1-α)×|Yp2| (2)
Yp4=α×Yp2 (3)
また、接続配線CW1の幅WC1の最小値を幅YWとすれば、幅YWは、下記式(4)で表される。
=Yp2+W00+(1-α)×|Yp2|-αYp2
=W00+Yp2+|Yp2|-α|Yp2|-αYp2 (4)
ここで、Yp2が負の値であることから、Yp2と|Yp2|とは逆の極性となり、Yp2+|Yp2|、および、α|Yp2|-αYp2は各々打ち消されるため、最終的に幅YWは幅W00に等しくなる。
次に、配線層における配線レイアウトおよびその設計方法の第3変形例について説明する。
次に、配線層における配線レイアウトおよびその設計方法の第4変形例について説明する。
実施の形態1では、図5に示したように、シュリンク処理が行われた領域AW11に配置された配線WR11は、配線WR11と同層に形成された接続配線CW1を介して、シュリンク処理が行われた領域AW11以外の領域AW12に同層に配置された配線WR12と接続されていた。一方、実施の形態2では、後述する図40を用いて説明するように、シュリンク領域が行われた領域AW21に配置された配線WR21は、配線WR21と異なる層に形成された接続配線CW1を介して、シュリンク処理が行われた領域AW21以外の領域AW22に同層に配置された配線WR22と接続されている。
次に、配線層における配線レイアウトについて説明する。以下では、第2層の配線層ML2における配線レイアウトを例示して説明するが、例えば第1層など、第2層以外の層の配線層における配線レイアウトについても、同様にすることができる。
次に、配線層における配線レイアウトの設計方法を、露光用マスクの製造方法を含めて説明する。なお、第2層の配線層ML2における配線レイアウトを、実施の形態1で説明した第1層の配線層ML1における配線レイアウトの設計方法と同様の方法により設計することができるので、本実施の形態2における配線レイアウトの設計方法では、実施の形態1における配線レイアウトの設計方法と異なる部分を中心に、説明する。また、本実施の形態2における最上層の配線層ML3における配線レイアウトを、実施の形態1における最上層の配線層ML3における配線レイアウトの設計方法と同様の方法により設計することができる。また、本実施の形態2における露光用マスクも、実施の形態1における露光用マスクと同様に製造することができる。
Ymargin=(1-α)/α×(|Yv|+0.5×V1+Δ) (6)
一方、第2層の配線層ML2のマスクサイズ効果またはOPC処理を考慮した最小線幅を、幅W0とする。このとき、シュリンク処理を行った後の端子部PD2(図40参照)のX軸方向における長さは、(W0+α×(Xmargin+Δ))以上となり、Y軸方向における幅が、(W0+α×(Ymargin+Δ))以上となる。
Sshrink=1/α×S0 (8)
次に、図11のステップS4と同様の工程を行って、図45に示すように、縮小部分マスクデータを貼り付ける。この工程では、縮小部分マスクデータDAT21内の位置CT21が、領域AW23内の位置CT22(図43参照)と同じ座標になるように、縮小部分マスクデータDAT21を、平面FSの領域AW23内の領域であって、領域AW22から離れた領域である領域AW21に貼り付ける。このとき、領域AW21と領域AW22との間の領域は、マスクデータが作成されていない隙間領域AW24である。
本実施の形態2では、最上層の配線層ML3以外の配線層である第2層の配線層ML2のマスクデータを作成する際に、複数の画素PUを含む領域AW23内のいずれかの位置を中心としてシュリンク処理を行う。そのため、本実施の形態2でも、最上層の配線層ML3以外の配線層である第2層の配線層ML2において、領域AW23内の領域AW21に配置される配線WR21のピッチが、領域AW23とは異なる領域である領域AW22に配置される配線WR22のピッチよりも小さい。
次に、配線層における配線レイアウトおよびその設計方法の第1変形例について説明する。本第1変形例では、複数のビアVA1に対しても、シュリンク処理が行われている。
図48に示すように、シュリンク処理を行う前の端子部PC1は、ビアVA1が配置される領域に対して、X軸方向におけるシュリンク中心位置CT21側に距離Xmargin2だけ突出している。また、シュリンク処理を行う前の端子部PC1は、ビアVA1が配置される領域に対して、Y軸方向におけるシュリンク中心位置CT21側に距離Ymargin2だけ突出している。距離Xmargin2および距離Ymagrin2は、下記式(10)および下記式(11)で定義される。なお、マージンΔ´を、第2層の配線層ML2に対するビアVA1の位置の許容可能なずれ量、すなわちずれ量のマージンとする。
Ymargin2=(1-α)×(|Yv|-0.5×V1´)+Δ´ (11)
図49は、実施の形態2の第1変形例における第2層の配線層の配線レイアウトデータを第1層の配線層の配線レイアウトデータと重ねて示す平面図である。図49に示す例では、第1層の配線層ML1は、Y軸方向にそれぞれ延在し、かつ、X軸方向に配列された複数の配線WR11を含む。
次に、配線層における配線レイアウトおよびその設計方法の第2変形例について説明する。本第2変形例では、画素領域側で下層の配線層に形成された配線が、その下層の配線層よりも上層の配線層に形成された接続配線を介して、周辺回路領域側で下層の配線層に配置された配線と電気的に接続されている。
次に、配線層における配線レイアウトおよびその設計方法の第3変形例について説明する。本第3変形例では、画素領域側で上層の配線層に形成された配線が、下層の配線層に形成された接続配線を介して、周辺回路領域側で上層の配線層に配置された配線と電気的に接続されている。また、本第3変形例では、複数の端子部PD2の各々の形状を、互いに同一の形状とすることができる。
Ymarginu=(1-α)/α×(|Yvu|+0.5×V1+Δ) (13)
Ymarginl=(1-α)/α×(|Yvl|+0.5×V1+Δ) (14)
端子部PD2は、実施の形態2で図40および図42を用いて説明した距離Xmarginおよび距離Ymarginだけ突出すれば足りる。しかし、Y軸方向に配列された端子部PD2の数が極めて多いため、マスクデータを作成する際に、各端子部PD2に対応したビアVA1の座標を確認しながら、端子部PD2ごとに距離Xmarginおよび距離Ymarginを設定する場合、マスクデータを作成する工程が複雑になる。そこで、図59および図60に示すように、切り出される領域AW23の全領域で、各端子部PD2のマージンの最大値、すなわちビアVA1が配置される領域から端子部PD2が突出する距離の最大値を算出し、その最大値以上のマージンを有する同一の形状の端子部PD2を配置する。これにより、実施の形態2が有する効果に加え、さらに、マスクデータを作成する工程を、実施の形態2に比べて簡便なものにすることができる。
次に、配線層における配線レイアウトおよびその設計方法の第4変形例について説明する。本第4変形例では、複数の配線WR21および複数のビアVA1に加え、複数の接続配線CW1にも、シュリンク処理が行われている。
AW11~AW13、AW21~AW23、AW231~AW235 領域
AW14、AW24、AW34 隙間領域
AW31~AW33、AWV 領域
BS 基体
BW 隔壁
CAP キャップ絶縁膜
CF カラーフィルタ
CT11、CT21 シュリンク中心位置(位置)
CT12、CT22、CT31、CT32 位置
CW1 接続配線(配線パターン)
CW1a、CW2、CW2a 接続配線
CW11、CW12 延在部
CW13 接続部
DAT1、DAT1a、DAT2、DAT2a、DAT3、DAT3a マスクデータ
DAT11、DAT21、DAT31 縮小部分マスクデータ
DAT13、DAT23、DAT33 部分マスクデータ
DAT14、DAT34 隙間部分マスクデータ
DS1~DS3 ずれ量
EP11、EP12、EP21、EP22 端部
EX11、EX12 延在部
FS 平面
GE ゲート電極
GI ゲート絶縁膜
IL、IL1~IL3 層間絶縁膜
IL4 絶縁膜
ML マイクロレンズ
ML1~ML3 配線層
MSK 露光用マスク
NW n型半導体層
OP1 開口部
PC1、PC2 端子部
PD フォトダイオード
PD1、PD2 端子部
PD21、PD22 突出部
PT11~PT13、PT21~PT23 ピッチ
PTN1~PTN3 露光用パターン
PTV1、PTV2 ピッチ
PU 画素
PW p型半導体層
RF1 レジスト膜
RG1、RG2、RG31~RG33 領域
RP1~RP3 レジストパターン
SB 半導体基板
SC1、SC11、SC12、SC2、SC21、SC22 側面
SC31、SC32 側面
SF1、SF11~SF13 遮光膜
SP1 スペース幅
SW サイドウォール
SW11、SW12、SW21、SW22 側面
TR11~TR13、TR2、TR3 配線溝
TX 転送用トランジスタ
VA1、VA2 ビア
WC1 幅
WD11~WD14、WD21、WD22 幅
WR11、WR12、WR13、WR21、WR22 配線(配線パターン)
WR11a、WR12a、WR1a、WR3 配線
WR21~WR23、WR2a、WR23、WR3 配線
Claims (20)
- 半導体基板と、
前記半導体基板の主面の第1領域で、前記半導体基板の前記主面に形成された複数の光電変換素子と、
前記第1領域で、前記半導体基板の前記主面の上方に、互いに同層に形成された複数の第1配線と、
前記半導体基板の前記主面の第2領域で、前記複数の第1配線とそれぞれ同層に形成された複数の第2配線と、
を有し、
前記第2領域は、平面視において、第1方向における前記第1領域の第1の側に配置された領域であり、
前記複数の第1配線は、平面視において、前記第1方向にそれぞれ延在し、かつ、前記第1方向と交差する第2方向に第1ピッチで配列され、
前記複数の第2配線は、平面視において、前記第1方向にそれぞれ延在し、かつ、前記第2方向に第2ピッチで配列され、
前記複数の第1配線は、前記複数の第2配線の各々とそれぞれ電気的に接続され、
前記第1ピッチは、前記第2ピッチよりも小さい、半導体装置。 - 請求項1記載の半導体装置において、
前記第1領域および前記第2領域で、前記半導体基板の前記主面の上方に形成された複数の配線層を有し、
前記複数の配線層のうち最上層の配線層よりも下層の配線層は、前記複数の第1配線と、前記複数の第2配線と、を含む、半導体装置。 - 請求項1記載の半導体装置において、
前記複数の第1配線の各々の前記第2方向における第1幅は、前記複数の第2配線の各々の前記第2方向における第2幅よりも狭い、半導体装置。 - 請求項1記載の半導体装置において、
前記複数の第1配線とそれぞれ同層に形成された複数の接続配線を有し、
前記複数の第1配線は、前記複数の接続配線の各々を介して、前記複数の第2配線の各々とそれぞれ接続されている、半導体装置。 - 請求項4記載の半導体装置において、
前記複数の接続配線の各々の前記第2方向における第3幅は、前記複数の第1配線の各々の前記第2領域側の第1端部の前記第2方向における第4幅よりも広く、かつ、前記複数の第2配線の各々の前記第1領域側の第2端部の前記第2方向における第5幅以上である、半導体装置。 - 請求項1記載の半導体装置において、
前記複数の第1配線のうちいずれかの第1配線は、平面視において、前記複数の第2配線のうち、前記いずれかの第1配線と接続された第2配線よりも、前記第2方向における第2の側にずれて配置されている、半導体装置。 - 請求項6記載の半導体装置において、
前記いずれかの第1配線の前記第2領域側の第3端部のうち、前記第2方向における前記第2の側と反対側の部分は、前記いずれかの第1配線と接続された第2配線の前記第1領域側の第4端部のうち、前記第2方向における前記第2の側の部分と接触している、半導体装置。 - 請求項5記載の半導体装置において、
前記複数の接続配線のうち第1接続配線は、前記複数の第1配線のうちいずれかの第1配線と接続され、かつ、前記複数の第2配線のうちいずれかの第2配線と接続され、
前記第1接続配線の前記第2方向における第3の側の第1側面と、前記いずれかの第1配線の前記第1端部の、前記第2方向における前記第3の側の第2側面とは、同一面を形成し、
前記第1接続配線の前記第2方向における前記第3の側と反対側の第3側面と、前記いずれかの第2配線の前記第2端部の、前記第2方向における前記第3の側と反対側の第4側面とは、同一面を形成している、半導体装置。 - 請求項8記載の半導体装置において、
前記いずれかの第1配線の前記第1端部の、前記第2方向における前記第3の側と反対側の第5側面は、平面視において、前記いずれかの第2配線の前記第2端部の、前記第2方向における前記第3の側の第6側面よりも、前記第2方向における前記第3の側に配置されている、半導体装置。 - 請求項4記載の半導体装置において、
前記複数の接続配線のうち第2接続配線は、前記複数の第1配線のうちいずれかの第1配線と接続され、かつ、前記複数の第2配線のうちいずれかの第2配線と接続され、
前記いずれかの第1配線の前記第2領域側の第3端部の、前記第2方向における第4の側の第7側面は、平面視において、前記いずれかの第2配線の前記第1領域側の第4端部の、前記第2方向における前記第4の側と反対側の第8側面よりも、前記第2方向における前記第4の側に配置され、
前記第2接続配線の前記第2方向における前記第4の側と反対側の第9側面と、前記第8側面とは、同一面を形成し、
前記第2接続配線の前記第2方向における前記第4の側の第10側面と、前記第7側面とは、同一面を形成している、半導体装置。 - 請求項4記載の半導体装置において、
互いに接続された前記第1配線、前記接続配線および前記第2配線の組では、前記接続配線の前記第2方向における第5の側の第11側面は、前記第1配線の前記第2方向における前記第5の側の第12側面、および、前記第2配線の前記第2方向における前記第5の側の第13側面、のいずれとも連続し、
前記組では、前記接続配線の前記第2方向における前記第5の側と反対側の第14側面は、前記第1配線の前記第2方向における前記第5の側と反対側の第15側面、および、前記第2配線の前記第2方向における前記第5の側と反対側の第16側面、のいずれとも連続している、半導体装置。 - 請求項1記載の半導体装置において、
前記複数の第1配線と異なる層にそれぞれ形成された複数の接続配線を有し、
前記複数の第1配線は、前記複数の接続配線の各々を介して、前記複数の第2配線の各々とそれぞれ電気的に接続されている、半導体装置。 - 請求項12記載の半導体装置において、
前記複数の接続配線の各々は、前記複数の第1配線よりも下層に形成されている、半導体装置。 - 請求項12記載の半導体装置において、
前記複数の第1配線と前記複数の接続配線との間の層に形成された複数の第1電極と、
前記複数の第2配線と前記複数の接続配線との間の層に形成された複数の第2電極と、
を有し、
前記複数の第1配線は、前記複数の第1電極の各々を介して、前記複数の接続配線の各々とそれぞれ電気的に接続され、
前記複数の第2配線は、前記複数の第2電極の各々を介して、前記複数の接続配線の各々とそれぞれ電気的に接続され、
前記複数の第1電極は、平面視において、前記第2方向に第3ピッチで配列され、
前記複数の第2電極は、平面視において、前記第2方向に前記第2ピッチで配列され、
前記第3ピッチは、前記第2ピッチよりも小さい、半導体装置。 - 請求項12記載の半導体装置において、
前記複数の接続配線の各々は、前記複数の第1配線よりも上層に形成されている、半導体装置。 - 請求項14記載の半導体装置において、
前記第1領域で、前記複数の第1配線とそれぞれ同層に形成された複数の第1端子部を有し、
前記複数の第1端子部は、前記複数の第1配線の各々とそれぞれ電気的に接続され、かつ、前記複数の第1電極の各々を介して、前記複数の接続配線の各々とそれぞれ電気的に接続され、
互いに電気的に接続された前記第1配線、前記第1端子部、前記第1電極および前記接続配線の組では、前記第1端子部は、前記第1配線よりも前記第2方向における第6の側に突出した第1突出部と、前記第1配線よりも前記第2方向における前記第6の側と反対側に突出した第2突出部と、を含み、
前記組では、前記第1端子部は、平面視において、前記接続配線と重なり、
前記組では、前記第1電極は、平面視において、前記接続配線と重なる部分の前記第1端子部に内包されている、半導体装置。 - 請求項14記載の半導体装置において、
前記第1領域で、前記複数の第1配線とそれぞれ同層に形成された複数の第2端子部を有し、
前記複数の第2端子部は、前記複数の第1配線の各々とそれぞれ電気的に接続され、かつ、前記複数の第1電極の各々を介して、前記複数の接続配線の各々とそれぞれ電気的に接続され、
互いに電気的に接続された前記第1配線、前記第2端子部、前記第1電極および前記接続配線の組では、前記第2端子部は、平面視において、前記接続配線と重なり、
前記組では、前記第1電極は、平面視において、前記接続配線と重なる部分の前記第2端子部に内包され、
前記複数の第2端子部のうち、前記複数の第1配線の配列の中央部に配置された第1配線に接続された第2端子部の、前記第2方向における第6幅は、前記複数の第2端子部のうち、前記複数の第1配線の配列の端部に配置された第1配線に接続された第2端子部の、前記第2方向における第7幅よりも狭い、半導体装置。 - 請求項12記載の半導体装置において、
前記複数の接続配線は、平面視において、前記第2方向に第4ピッチで配列され、
前記第4ピッチは、前記第1ピッチよりも大きく、かつ、前記第2ピッチよりも小さい、半導体装置。 - 半導体基板と、
前記半導体基板の主面の第1領域で、前記半導体基板の前記主面に形成された複数の光電変換素子と、
前記第1領域で、前記半導体基板の前記主面の上方に、互いに同層に形成された複数の第1配線と、
前記半導体基板の前記主面の第2領域で、前記複数の第1配線とそれぞれ同層に形成された複数の第2配線と、
を有し、
前記第2領域は、平面視において、第1方向における前記第1領域の第1の側に配置された領域であり、
前記複数の第1配線は、平面視において、前記第1方向にそれぞれ延在し、かつ、前記第1方向と交差する第2方向に配列され、
前記複数の第2配線は、平面視において、前記第1方向にそれぞれ延在し、かつ、前記第2方向に配列され、
前記複数の第1配線は、前記複数の第2配線の各々とそれぞれ電気的に接続され、
前記複数の第1配線のうち、前記複数の第1配線の配列の前記第2方向における第2の側の端部に配置された第1配線は、平面視において、前記複数の第2配線のうち、前記第1配線と接続された第2配線よりも、前記第2方向における前記第2の側と反対側にずれて配置されている、半導体装置。 - (a)半導体基板を用意する工程、
(b)前記半導体基板の主面の第1領域で、前記半導体基板の前記主面に、複数の光電変換素子を形成する工程、
(c)前記第1領域で、前記半導体基板の前記主面の上方に、複数の第1配線を互いに同層に形成し、前記半導体基板の前記主面の第2領域で、複数の第2配線を、前記複数の第1配線とそれぞれ同層に形成する工程、
を備え、
前記第2領域は、平面視において、第1方向における前記第1領域の第1の側に配置された領域であり、
前記(c)工程は、
(d)前記複数の第1配線を形成するための第1露光用パターンと、前記複数の第2配線を形成するための第2露光用パターンと、を有する露光用マスクを製造する工程、
(e)前記(b)工程の後、前記露光用マスクを用いてフォトリソグラフィ工程を行い、平面視において、前記第1方向にそれぞれ延在し、かつ、前記第1方向と交差する第2方向に第1ピッチで配列された複数の第1配線を形成し、平面視において、前記第1方向にそれぞれ延在し、かつ、前記第2方向に前記第1ピッチよりも小さい第2ピッチで配列された複数の第2配線を形成する工程、
を有し、
前記複数の第1配線は、前記複数の第2配線の各々とそれぞれ電気的に接続され、
前記(d)工程は、
(d1)第1平面の第3領域で、前記第1平面内の第3方向にそれぞれ延在し、かつ、前記第1平面内の方向であって、前記第3方向と交差する方向である第4方向に第3ピッチで配列された複数の第1パターンと、前記第1平面の領域であって、前記第3方向における前記第3領域の第1の側に配置された領域である第4領域で、前記第3方向にそれぞれ延在し、かつ、前記第4方向に前記第3ピッチで配列された複数の第2パターンと、を有する第1パターンデータを作成する工程、
(d2)前記第1パターンデータのうち、前記第3領域に配置された部分からなる第1部分パターンデータを、切り出す工程、
(d3)切り出された前記第1部分パターンデータに対して縮小処理を行い、前記第3方向にそれぞれ延在し、かつ、前記第4方向に前記第3ピッチよりも小さい第4ピッチで配列された複数の第3パターンを有する第2部分パターンデータを作成する工程、
(d4)前記第2部分パターンデータを、前記第1平面の前記第3領域内の領域であって、前記第4領域から離れた領域である第5領域に貼り付け、前記第5領域に配置された前記複数の第3パターンと、前記第4領域に配置された前記複数の第2パターンと、を有する第2パターンデータを形成する工程、
(d5)前記第2パターンデータの前記複数の第3パターンに基づいて形成された前記第1露光用パターンと、前記第2パターンデータの前記複数の第2パターンに基づいて形成された前記第2露光用パターンと、を有する前記露光用マスクを製造する工程、
を含む、半導体装置の製造方法。
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US (1) | US9947708B2 (ja) |
JP (1) | JPWO2016129109A1 (ja) |
KR (1) | KR20170116937A (ja) |
CN (1) | CN107210305A (ja) |
TW (1) | TW201705454A (ja) |
WO (1) | WO2016129109A1 (ja) |
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WO2016047282A1 (ja) * | 2014-09-24 | 2016-03-31 | ソニー株式会社 | 撮像素子、撮像装置および撮像素子の製造方法 |
JP6928746B2 (ja) * | 2017-04-10 | 2021-09-01 | ブリルニクス シンガポール プライベート リミテッド | 固体撮像装置、固体撮像装置の製造方法、および電子機器 |
KR20200026673A (ko) * | 2019-06-11 | 2020-03-11 | 엘지전자 주식회사 | 디스플레이 장치의 제조방법 및 디스플레이 장치 제조를 위한 기판 |
US20220245318A1 (en) * | 2021-01-29 | 2022-08-04 | Taiwan Semiconductor Manufacturing Company, Ltd. | Method of generating netlist including proximity-effect-inducer (pei) parameters |
CN113782559B (zh) * | 2021-09-14 | 2023-11-07 | 业成科技(成都)有限公司 | 导电模组及显示装置 |
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2015
- 2015-02-13 US US14/910,688 patent/US9947708B2/en active Active
- 2015-02-13 KR KR1020167003608A patent/KR20170116937A/ko unknown
- 2015-02-13 JP JP2015562229A patent/JPWO2016129109A1/ja active Pending
- 2015-02-13 CN CN201580001562.0A patent/CN107210305A/zh active Pending
- 2015-02-13 WO PCT/JP2015/053997 patent/WO2016129109A1/ja active Application Filing
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2016
- 2016-01-13 TW TW105100989A patent/TW201705454A/zh unknown
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JP2001306641A (ja) * | 2000-04-27 | 2001-11-02 | Victor Co Of Japan Ltd | 半導体集積回路の自動配置配線方法 |
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KR20170116937A (ko) | 2017-10-20 |
US20160372509A1 (en) | 2016-12-22 |
US9947708B2 (en) | 2018-04-17 |
JPWO2016129109A1 (ja) | 2017-11-24 |
TW201705454A (zh) | 2017-02-01 |
CN107210305A (zh) | 2017-09-26 |
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