WO2004075281A1 - 半導体装置、及びそれを用いた放射線検出器 - Google Patents
半導体装置、及びそれを用いた放射線検出器 Download PDFInfo
- Publication number
- WO2004075281A1 WO2004075281A1 PCT/JP2004/002132 JP2004002132W WO2004075281A1 WO 2004075281 A1 WO2004075281 A1 WO 2004075281A1 JP 2004002132 W JP2004002132 W JP 2004002132W WO 2004075281 A1 WO2004075281 A1 WO 2004075281A1
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- WIPO (PCT)
- Prior art keywords
- wiring board
- hole
- glass
- radiation
- semiconductor device
- Prior art date
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Classifications
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- H—ELECTRICITY
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- H05K3/00—Apparatus or processes for manufacturing printed circuits
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- H05K3/0017—Etching of the substrate by chemical or physical means
- H05K3/002—Etching of the substrate by chemical or physical means by liquid chemical etching
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- H01L23/12—Mountings, e.g. non-detachable insulating substrates
- H01L23/13—Mountings, e.g. non-detachable insulating substrates characterised by the shape
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- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14601—Structural or functional details thereof
- H01L27/14634—Assemblies, i.e. Hybrid structures
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- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14643—Photodiode arrays; MOS imagers
- H01L27/14658—X-ray, gamma-ray or corpuscular radiation imagers
- H01L27/14661—X-ray, gamma-ray or corpuscular radiation imagers of the hybrid type
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- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14643—Photodiode arrays; MOS imagers
- H01L27/14658—X-ray, gamma-ray or corpuscular radiation imagers
- H01L27/14663—Indirect radiation imagers, e.g. using luminescent members
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16151—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/16221—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/16225—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
- H01L2224/16235—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation the bump connector connecting to a via metallisation of the item
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16151—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/16221—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/16225—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
- H01L2224/16237—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation the bump connector connecting to a bonding area disposed in a recess of the surface of the item
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
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- H01L2924/0102—Calcium [Ca]
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- H01L2924/01046—Palladium [Pd]
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- H01L2924/049—Nitrides composed of metals from groups of the periodic table
- H01L2924/0494—4th Group
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- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
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- H01L2924/1204—Optical Diode
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/151—Die mounting substrate
- H01L2924/1515—Shape
- H01L2924/15153—Shape the die mounting substrate comprising a recess for hosting the device
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
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- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/151—Die mounting substrate
- H01L2924/153—Connection portion
- H01L2924/1531—Connection portion the connection portion being formed only on the surface of the substrate opposite to the die mounting surface
- H01L2924/15312—Connection portion the connection portion being formed only on the surface of the substrate opposite to the die mounting surface being a pin array, e.g. PGA
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0306—Inorganic insulating substrates, e.g. ceramic, glass
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09818—Shape or layout details not covered by a single group of H05K2201/09009 - H05K2201/09809
- H05K2201/09827—Tapered, e.g. tapered hole, via or groove
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/02—Details related to mechanical or acoustic processing, e.g. drilling, punching, cutting, using ultrasound
- H05K2203/0235—Laminating followed by cutting or slicing perpendicular to plane of the laminate; Embedding wires in an object and cutting or slicing the object perpendicular to direction of the wires
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/341—Surface mounted components
- H05K3/3431—Leadless components
- H05K3/3436—Leadless components having an array of bottom contacts, e.g. pad grid array or ball grid array components
Definitions
- the present invention relates to a semiconductor device having a wiring board provided with a conductive path for guiding an electric signal, and a radiation detector using the same.
- a radiation detector used for a CT sensor or the like there is a detector having a configuration in which a scintillator is provided on a light incident surface of a semiconductor light detection element which is a semiconductor element.
- a radiation detector when radiation such as an X-ray, a y-ray, or a charged particle beam to be detected enters the scintillator, scintillation light is generated by the radiation in the scintillator. Then, the semiconductor photodetector detects the scintillation light incident from the scintillator and outputs an electric signal corresponding to the intensity of the radiation.
- a signal processing element is provided to perform signal processing on an electric signal output from the semiconductor photodetector.
- an integrated semiconductor device is formed by connecting the semiconductor element to a wiring board provided with a conductive path.
- a configuration in which a signal processing element is connected to a wiring board of the semiconductor device is used.
- Such a semiconductor device using a wiring board is used for various purposes other than the radiation detector (for example, Japanese Patent Application Laid-Open No. 2555552/1990, Japanese Unexamined Patent Application Publication No. No.).
- a semiconductor device having a configuration in which a wiring board is connected to a semiconductor element
- a chip of the semiconductor element is mounted on the wiring board by flip-chip bonding, via a bump electrode provided on the semiconductor element.
- the semiconductor element and the corresponding conductive path on the wiring board are electrically connected.
- the size, height, arrangement, etc. of the bump electrodes such as the large bump electrodes being excessively crushed or the adjacent bump electrodes being in contact with each other This may cause a problem in connection between the semiconductor element and the wiring board.
- the present invention has been made in order to solve the above problems, and a semiconductor device in which a semiconductor element and a corresponding conductive path on a wiring board are satisfactorily connected. It is an object to provide a radiation detector used.
- a semiconductor device comprises: (1) a semiconductor element that outputs an electric signal; and (2) an electric signal between a signal input surface and a signal output surface. And a wiring board having a signal input surface to which a semiconductor element is connected. (3)
- the wiring board includes a core glass portion and a coating glass portion provided around the core glass portion.
- a glass substrate provided with a through-hole formed by cutting a bundle-shaped glass member formed by bundling fiber-like glass members into a desired thickness and removing a core glass portion, and a signal input provided in the through-hole.
- the semiconductor element and the corresponding conductive member on the wiring board are electrically conductive. Bump electrodes formed one-to-one with members Characterized in that it is electrically connected via a.
- a wiring board for connecting semiconductor elements such as a semiconductor photodetector is integrally formed from a plurality of glass fibers, and a predetermined position of the input surface from the input surface to the output surface is provided.
- a glass substrate provided with through holes is used.
- the semiconductor element and the conductive member, which is a conductive path on the wiring board are connected by making the bump electrodes of the semiconductor element correspond to the through holes and the conductive member one-to-one. According to such a configuration, when the semiconductor element is mounted on the wiring board, a part of the bump electrode enters into the through hole provided with the conductive member.
- the conductive member is preferably formed on the inner wall of a through hole provided in the glass substrate.
- the through hole in the glass substrate is formed such that the opening area on the signal input surface is larger than the opening area at a predetermined position inside the glass substrate.
- the bump electrode can be reliably connected to the conductive member provided in the through hole.
- the through-hole in the glass substrate has a predetermined area on the signal input surface side, and an opening area gradually decreases from the signal input surface toward the inside of the glass substrate.
- it is formed in a tapered shape.
- the through-hole in the glass substrate is formed in a concave shape in which a predetermined area on the signal input surface side has a predetermined opening area larger than an opening area in a range including a predetermined position inside the glass substrate. .
- the glass substrate may be configured to have at least a first through hole having a predetermined opening area and a second through hole having an opening area different from the first through hole as the through holes. good.
- the opening area of each through-hole can be suitably set according to the size and height of the bump electrode connected to the conductive member provided in the through-hole.
- a configuration may be further provided that includes a signal processing unit connected to the signal output surface of the wiring board and processing an electric signal from the semiconductor element.
- a semiconductor device having a configuration in which the electric signal output from the semiconductor element is processed by the signal processing means is obtained.
- a radiation detector is a radiation detector configured to include the above-described semiconductor device, and (a) includes a semiconductor element and detects incident radiation.
- a radiation detecting means for detecting and outputting an electric signal; (2) a signal processing means for processing an electric signal from the radiation detecting means; and (3) a wiring board, wherein the radiation detecting means and the signal processing means each have a signal input. And a wiring board connected to the signal output surface.
- the radiation detection means is included in the radiation detection means as a wiring board unit for electrically connecting the radiation detection means and the signal processing means and transmitting a detection signal as an electric signal.
- the wiring board that constitutes the above-described semiconductor device is used together with the semiconductor element. According to such a configuration, since the semiconductor element and the corresponding conductive member on the wiring board are satisfactorily connected, the detection signal is transmitted from the radiation detecting means to the signal processing means and detected by the signal processing means. A radiation detector that can reliably process signals is realized.
- the glass substrate used for the wiring substrate is preferably formed from a predetermined glass material having a radiation shielding function. Thereby, transmission of radiation from the radiation detecting means to the signal processing means can be suppressed.
- a glass material include a glass material containing lead.
- the radiation detection means has a scintillator that generates scintillation light by incidence of radiation, and a semiconductor light detection element that detects scintillation light from the scintillator.
- a configuration can be used.
- the radiation detection means a configuration having a semiconductor detection element for detecting incident radiation may be used.
- FIG. 1 is a side cross-sectional view showing a cross-sectional structure of a semiconductor device and a radiation detector using the semiconductor device according to an embodiment.
- FIG. 2 is an exploded perspective view showing the configuration of the radiation detector shown in FIG.
- FIGS. 3A and 3B are plan views showing the configurations of the (A) signal input surface and the (B) signal output surface of the wiring board.
- FIGS. 4A and 4B are diagrams illustrating an example of a configuration of a through hole of a wiring board and a conductive member provided in the through hole.
- FIGS. 5A and 5B are diagrams showing an example of a configuration of a through hole and a conductive member in a wiring board, and an example of connection with a bump electrode.
- FIGS. 6A and 6B are diagrams showing another example of the configuration of the through hole and the conductive member in the wiring board, and the connection of the structure with the bump electrode.
- FIGS. 7A and 7B are diagrams showing another example of the configuration of the through-hole and the conductive member in the wiring board, and the connection with the bump electrode.
- 8A to 8E are diagrams illustrating an example of a method for manufacturing a wiring board.
- FIGS. 9A and 9B are diagrams illustrating an example of a method of manufacturing a wiring board.
- FIG. 10A and FIG. 10B are diagrams showing an example of a method for manufacturing a wiring board.
- FIGS. 11A to 11C are diagrams illustrating an example of a method of manufacturing a wiring board.
- FIG. 1 is a side sectional view showing a sectional structure of an embodiment of a semiconductor device and a radiation detector according to the present invention.
- Fig. 2 shows the semiconductor device shown in Fig. 1.
- FIG. 2 is a perspective view showing a configuration of a radiation detector in which each component is disassembled.
- the axis along the direction in which radiation enters is the z-axis
- two axes orthogonal to the z-axis are the X-axis
- y axis are the X-axis
- the negative direction of the Z axis is the conductive direction from the signal input surface to the signal output surface of the wiring board, and the arrangement direction of each component in the radiation detector.
- the radiation detector illustrated in FIG. 1 includes a scintillator 10, a semiconductor device 5, and a signal processing unit 3. These are arranged in this order from the upstream side (upper side in the figure) to the downstream side (lower side) along a predetermined arrangement direction, as shown in FIG.
- the configuration of the semiconductor device 5 including the photodiode array 15 and the wiring board 20 will be described.
- the photodiode array (PD array) 15 constitutes an upstream portion of the semiconductor device 5.
- the PD array 15 is a semiconductor photodetector array in which a plurality of photodiodes (PD), which are semiconductor elements that detect incident light and output an electric signal corresponding to the intensity, are arranged.
- PD photodiodes
- Figure 4 shows the formed PD array.
- the lower surface 15b of the PD array 15 is a signal output surface for outputting a detection signal from each photodiode 16.
- 16 bump electrodes 17, which are electrodes for detecting signal output, are provided in a 4 ⁇ 4 array so as to correspond to the photodiodes 16, respectively. I have.
- the bump electrode for the substrate electrode (common electrode) also has the same form as the detection signal output electrode.
- the wiring board 20 forms a downstream portion of the semiconductor device 5.
- the wiring board 20 is provided with a conductive path for guiding an electric signal between the signal input surface 20a and the signal output surface 20b, and the PD array described above is provided on the signal input surface 20a. 1 5 is connected.
- the core glass portion and the core glass portion PC orchid 004/002132
- a fiber glass member (glass fiber) including a coated glass portion provided around the glass fiber is bundled into a bundle of glass members, and the bundle is formed into a desired thickness in a predetermined direction crossing the axis of the glass fiber.
- a cut glass substrate is used.
- a predetermined glass material having a radiation shielding function such as a lead glass material containing lead, is used as the glass material of the wiring board 20. Used.
- FIGS. 3A and 3B are plan views each showing the configuration of the wiring board 20.
- FIG. 3A shows the signal input surface 20a, which is the upper surface thereof, and
- FIG. Indicates a signal output surface 20b which is a lower surface. It should be noted that only the main parts are shown in this figure, and the parts corresponding to the substrate electrodes of the PD array are not shown.
- FIGS. 4A and 4B are diagrams showing an example of the configuration of the through hole 20c of the wiring board 20 and the conductive member 21 provided in the through hole 20c.
- FIG. 4A is a top view
- FIG. 4B is a top view
- a predetermined glass fiber among a plurality of glass fibers included in the glass substrate is subjected to signal input by removing a core glass portion at the center thereof.
- a through hole 20c from the surface 20a to the signal output surface 20b is formed.
- a conductive member 21 that electrically conducts between the input surface 20a and the output surface 20b and functions as a conductive path is provided for each through hole 20c.
- each through hole 20c has a circular cross-sectional shape centered on an axis perpendicular to the input surface 20a and the output surface 20b of the wiring board 20. It is formed to have.
- the predetermined range of the through hole 20 c on the signal input surface 20 a side is a tapered tapered portion 2 O d in which the opening area gradually decreases from the input surface 20 a to the inside of the glass substrate. It has become.
- a predetermined range on the signal output surface 20b side is a tapered portion 20e having a tapered shape in which the opening area is gradually reduced from the output surface 2Ob toward the inside.
- a conductive member 21 electrically connecting the input surface 20a and the output surface 20b to the through hole 20c is formed on the inner wall of the through hole 20c. It is provided as a formed member. Specifically, as shown in FIGS. 4 A and FIG. 4 B, in the interior of the through-hole 2 0 c including a tapered portion 2 0 d, 2 0 e, and conductive portion 2 1 c is formed on the inner wall I have. Further, on the outer peripheral portion of the tapered portion 2 0 d on the input face 2 0 a, the input unit 2 1 a which is continuous with conducting portion 2 1 c is formed.
- an output portion 21b continuous with the conduction portion 21c is formed on the outer peripheral portion of the tapered portion 20e.
- the conductive part 21 c, the input part 21 a, and the output part 21 b constitute a conductive member 21 that becomes a conductive path in the wiring board 20.
- the input portion 21a of the conductive member 21a force output surface of the PD array 15b It is provided at a position corresponding to the upper bump electrode 17.
- the bump electrodes 17 of the PD array 15 correspond to the through-holes 20 c and the conductive members 21 of the wiring board 20 on a one-to-one basis, and the input section 21 a is formed of a bump electrode. 17 is an electrode pad to be connected.
- the bump electrode 17 is provided inside the through hole 20c provided with the conductive member 21 with respect to the corresponding conductive member 21 on the wiring board 20. It is connected so that a part can enter.
- the photodiode 16 that outputs a detection signal from the PD array 15 is electrically connected to the conductive member 21 that is a conductive path that transmits the detection signal from the wiring board 20 via the bump electrode 17. Connected.
- an electrode pad 22 is formed in addition to the output portion 21 b of the conductive member 21. Have been. Ma
- the electrode pads 22 are electrically connected to the corresponding output portions 21 b of the conductive members 21 via the wirings 23.
- an electrode pad 24 is formed on the output surface 2 Ob. The electrode pad 24 is used for connection with a housing 40 described later.
- a scintillator 10 is provided on the upstream side of the PD array 15 of the semiconductor device 5, and an upper surface 10a thereof serves as a radiation incident surface in the radiation detector.
- the scintillator 10 emits scintillation light of a predetermined wavelength when radiation such as X-rays, ⁇ -rays, and charged particle beams are incident on the incident surface 10a.
- the light emitting surface 10b, which is the lower surface of the scintillator 10 and the light incident surface 15a, which is the upper surface of the PD array 15, are optically coupled through an optical adhesive 11 that transmits scintillation light. Connected and glued.
- the scintillator 10 and the PD array 15 constitute the radiation detecting section 1 of the present radiation detector.
- the radiation detection unit 1 is a detection unit that detects incident radiation and outputs a detection signal as an electric signal corresponding to the intensity.
- the wiring board 20 forms a wiring board section 2 for connecting the radiation / line detection section 1 and the signal processing section 3.
- a signal processing unit 3 and a housing (package) 40 are provided downstream of the wiring board 20 of the semiconductor device 5.
- the signal processing unit 3 includes a signal processing element 30 provided with a signal processing circuit for processing a detection signal from the PD array 15.
- a bump electrode 31 is formed on the upper surface of the signal processing element 30.
- the bump electrode 31 is provided at a position corresponding to the electrode pad 22 on the output surface 20 b of the wiring board 20.
- the conductive member 21, which is a conductive path for transmitting the detection signal on the wiring board 20 has its output section 21 b, wiring 23, and electrode pad PC leak 004 ⁇ 132
- bump electrodes corresponding to the signal output of the PD array are shown in the figure, the drive signal of the signal processing circuit and the output signal from the signal processing circuit are similarly transmitted via the bump electrode. connected to predetermined electrode pads on the wiring board 2 0 of the output surface 2 on 0 b, via the electrode pads 2 4 and the bump electrode 4 4 on the housing 4 0 in the wiring board 2 0 of the output surface 2 on 0 b And is electrically connected to a predetermined lead 43.
- the housing 40 is a holding member that integrally holds the scintillator 10, the semiconductor device 5 including the PD array 15 and the wiring board 20, and the signal processing element 30. .
- the housing 40 is provided as a concave portion on the upper surface thereof, and is provided on an outer periphery of the element accommodating portion 41 for accommodating the signal processing element 30 therein and a bump electrode 44 via the bump electrode 44. It has a scintillator 10, a semiconductor device 5, and a support portion 42 that supports the signal processing element 30, while being connected to the electrode pad 24 of the wiring board 20. Further, on the lower surface of the housing 40, a lead 43 used for input / output of an electric signal to / from the outside is provided.
- a plurality of glass fibers are integrally formed as a wiring board 20 for connecting the PD array 15 which is a semiconductor element array.
- a glass substrate formed with a through hole 20c at a predetermined position from which a core glass part is removed is used.
- the wiring board 20 can be configured by a glass substrate in which the through holes 20c for providing the conductive members 21 are formed with a desired hole diameter and pitch.
- the through holes 20c can be formed with a fine hole diameter and a fine pitch.
- the semiconductor device is formed by associating the bump electrode 17 of the PD array 15 with the through hole 20c and the conductive member 21 formed in the through hole 20c in a one-to-one correspondence.
- the photodiode 16 of the PD array 15 as an element is connected to the conductive member 21 which is a conductive path in the wiring board 20. Thereby, the bump electrode 17 and the conductive member 21 can be connected well.
- the radiation detection unit 1 and the signal processing unit 3 are electrically connected to each other, and the radiation detection unit is used as a wiring board unit 2 for transmitting the detection signal.
- a wiring board 20 constituting the semiconductor device 5 is used together with the PD array 15 included in the unit 1. According to such a configuration, the photodiode 16 of the PD array 15 and the conductive member 21 of the wiring board 20 are connected well, so that the signal from the radiation detector 1 to the signal processor 3 is A radiation detector capable of transmitting a detection signal and processing the detection signal in the signal processing unit 3 can be realized.
- a glass substrate used for the wiring substrate 20 may be a predetermined glass having a radiation shielding function. It is preferable to use a substrate formed from a material. Thereby, transmission of radiation from the radiation detection unit 1 located on the upper surface 20a side of the wiring board 20 to the signal processing unit 3 located on the lower surface 20b side can be suppressed.
- a glass material for example, a glass material containing lead There is a fee. When using lead glass, it is preferable to appropriately set the amount of lead contained in the glass material according to the degree of radiation shielding function required for the radiation detector.
- a glass material having a radiation shielding function other than lead glass may be used.
- a glass material having no radiation shielding function may be used.
- FIG. 5A and FIG. 5B are diagrams showing a specific configuration of a through hole and a conductive member in a wiring board, and an example of a connection with a bump electrode.
- FIG. 5A shows a connection. The state before the connection is shown, and FIG. 5B shows the state after the connection.
- the wiring board 20 having the conductive member 21 provided in the through hole 20 c of the glass substrate formed of the glass fiber The semiconductor device 5 is constituted by using the PD array 15 having the bump electrode 17 formed so as to correspond to the hole 20 c and the conductive member 21 one-to-one.
- the through holes 2 provided with the conductive members 21 are provided.
- Part of the bump electrode 17 enters the inside of 0c.
- the contact area between the bump electrode and the conductive member increases, and the photodiode 16 of the PD array 15 and the corresponding conductive member 21 on the wiring board 20 are electrically connected via the bump electrode 17. Good and physically connected.
- the conductive member 21 in the wiring board 20 it is preferable to use a member formed on the inner wall of the through hole 20c as shown in FIGS. 4A and 4B.
- a problem may occur in the connection between the semiconductor element and the wiring substrate due to the size, height, arrangement, and the like of the bump electrodes.
- FIG. 5A four bump electrodes 17 provided on the output surface 15b of the PD array 15 are illustrated. Two slightly smaller bump electrodes 1 7 1, outer 2 Each of them has a bump electrode 17 2 larger than the bump electrode 17 1.
- a part of the bump electrode 17 depends on the size and height of the bump electrode 17. Each of them enters the inside of the through hole 20c provided with the corresponding conductive member 21. This prevents the bump electrodes 17 from being excessively crushed during mounting and spreading around the corresponding electrode pads. Therefore, it is possible to satisfactorily connect the bump electrode 17 and the corresponding conductive member 21 without short-circuiting the bump electrodes.
- the through hole 20c of the wiring board 20 generally has an opening area on the input surface 20a that is smaller than a predetermined position (for example, the opening area including the center position) inside the glass substrate. (A position within a fixed range) is preferably formed in a shape larger than the opening area.
- a predetermined position for example, the opening area including the center position
- FIG. 6A and FIG. 6B show through holes and conductive members in a wiring board.
- FIG. 9 is a diagram showing a specific configuration, and another example of connection with the bump electrodes.
- FIG. 6A shows a state before connection
- FIG. 6B shows a state after connection.
- a predetermined range on the input surface 20a side is set to a predetermined position (for example, a center position) inside the glass substrate.
- the concave portion 20 f is formed in a concave shape with an opening area (inner diameter) larger than the opening area (inner diameter of the circle) in the range including.
- the predetermined range of the input face 2 0 a side similarly to the configuration in which the tapered portion 2 0 d, a through hole 2 0 c opening at input face 2 0 a side where the bump electrodes 1 7 Ru is connected
- the bump electrode 17 can be reliably connected to the conductive member 21.
- the configuration of the through hole 20c provided in the wiring board 20 includes a tapered portion 20d or a concave portion 20f having a changed opening area on the input surface 20a side.
- the opening may be formed in a cylindrical shape having a constant opening area (circular inner diameter).
- FIGS. 7A and 7B are diagrams showing a specific configuration of a through hole and a conductive member in a wiring board, and another example of the connection with a bump electrode.
- A shows the state before connection
- FIG. 7B shows the state after connection.
- bump electrodes 17 provided on the output surface 15b of the PD array 15 are illustrated.
- the inner two are slightly smaller bump electrodes 171
- the outer two are bump electrodes 172 larger than bump electrodes 171.
- the inner area corresponding to the bump electrode 17 1 has an opening area of two. Slightly smaller through-hole (first through-hole) 210 1 c, two outer holes corresponding to bump electrodes 112, through-holes (second through-hole) 20 with larger opening area than through-hole 201 c 2 c.
- the conductive material of the through-hole forms a metal with high solder wettability on the outermost surface by using a solder having high wettability with metal as a bump electrode material. Then, a particularly good effect can be obtained.
- the conductive member 2 As described above, according to the configuration in which the through holes 201c and 202c having different opening areas from each other are provided as the through holes 20c in the wiring board 20, the conductive member 2
- the opening area of each through hole 20c can be suitably set according to the size, height, and the like of the bump electrode 17 connected to 1. Thereby, the bump electrode 17 can be reliably connected to the corresponding conductive member 21 irrespective of the difference in size, height, and the like.
- FIGS. 8A to 11C a glass substrate used as a wiring substrate in the semiconductor device and the radiation detector shown in FIG. 1 and a manufacturing method thereof will be described with reference to FIGS. 8A to 11C.
- a general configuration example of a glass substrate having a through hole and a manufacturing method thereof are shown. Therefore, the glass substrate described below has a different shape and configuration from the wiring substrate used for the radiation detector shown in FIG.
- a base material 61 including a core glass part 63 and a covering glass part 65 provided around the core glass part 63 is prepared.
- the outer diameter of the base material 61 is, for example, about 40 to 45 mm, and the outer diameter of the core glass part 63 is, for example, about 28 to 3 lmm.
- the core glass part 63 is made of acid-soluble glass, and the coated glass part 65 is made of lead glass, soda-lime glass, Kovar glass, Pyrex glass, or the like.
- the base material 61 is drawn to produce a glass fiber 67 which is a fiber-like glass member.
- the outer diameter of the glass fiber 67 is, for example, about 0.4 mm.
- a plurality of the glass fibers 67 are bundled and aligned in a predetermined mold 69.
- a mold 69 having a hexagonal shape as viewed from the center axis direction of the glass fiber 67 is used, and about 10,000 glass fibers 67 are stacked.
- the glass fibers 67 are aligned so as to have a hexagonal shape when viewed from the center axis direction, as shown in FIG. 8D.
- the glass fiber 6 7 When viewed from the center axis direction, use a mold that has a triangular or quadrangular shape,
- the bars 67 may be aligned so as to have a triangular or quadrangular shape when viewed from the center axis direction.
- a bundle of glass fibers 67 is drawn in an aligned state to produce a multi-fiber 71.
- the outer diameter of the multi-fiber 71 is, for example, about 0.7 mm.
- a plurality of the drawn multi-fibers 71 are arranged in a predetermined glass tube 73 and stored.
- the inner diameter of the glass tube 73 is about 100 mm.
- the multi-fibers 71 housed in the glass tube 73 are heated and fused together.
- a glass tube 75 thinner than this glass tube is connected to one end of the glass tube 73, and the pressure inside the glass tube 73 is reduced by evacuating with a rotary pump or the like.
- the multi-fibers 71 contact each other at atmospheric pressure without any gap and can be fused.
- the heating temperature is, for example, about 600 degrees, and the internal pressure is about 0.5 Pa.
- the other end of the glass tube 73 is sealed.
- the glass tube 75 and the sealed portion are removed. Thereafter, as shown in FIG. 1OA, the outer periphery of the glass tube 73 is polished with a grindstone 79 or the like, and the bundle of glass members 77 is shaped (outer diameter).
- An outer peripheral polishing machine can be used for setting the outer diameter of the bundle of glass members 77.
- the bundle of glass members 77 is cut into a desired thickness.
- the through-holes are formed on the upper surface and the wiring board 20 as shown in FIG.
- a glass substrate having a shape centered on an axis perpendicular to the lower surface is obtained.
- the bundled glass member 77 is cut by a slicer 81 so as to be inclined at a predetermined angle 0 with respect to an axis 1 perpendicular to the central axis. You may decline. Further, the cut surface of the glass member cut by the slicer 81 is polished. Through these steps, a plate-like glass member 83 is formed as shown in FIGS. 11A and 11B. Here, the glass member 83 in the case where the glass member 83 is cut so as to be oblique at an angle ⁇ is shown as an example.
- the core glass portion 63 is removed (core-removed) from the plate-like glass member 83.
- HN 0 3 or HC 1 to remove the core glass portions 6 3 by etching.
- a plurality of through holes 84 penetrating the plate-shaped glass member 83 in the thickness direction are formed, and a glass substrate having the through holes is formed.
- the semiconductor device 5 shown in FIG. 1 and the wiring board 20 in the radiation detector using the same include, for example, a through-hole in a glass substrate obtained by the above-described manufacturing method.
- a member formed with a conductive member serving as a conductive path can be used. That is, in the glass substrate having such a configuration, the shape of the substrate and the number and arrangement of the through holes are set in accordance with the configuration of the radiation detector. Then, a conductive member serving as a conductive path is formed in a through hole provided in the glass substrate, and an electric wiring pattern including necessary electrodes and wirings is formed on each surface of the conductive member.
- a wiring board having the configuration shown in FIGS. 3A and 3B is obtained.
- a glass member is formed by cutting a bundle-shaped glass member in which a plurality of glass fibers are bundled, and a predetermined core glass portion is removed to form a winning hole.
- a provided glass substrate is prepared.
- a conductive member serving as a conductive path is formed in the winning hole, and further, an electric wiring pattern having necessary electrodes and wirings is formed on both surfaces serving as an input surface and an output surface, and is used for the semiconductor device 5.
- Be The wiring substrate 20 is manufactured.
- the conductive part 21c, the input part 21a, and the output part 21 are provided with respect to the through-hole 20c provided in the glass substrate.
- the conductive member 21 made of b is formed. Further, the electrode pads 22 and 24 and the wiring 23 are formed on the output surface 20 b to form the wiring board 20.
- Examples of the above-described conductive member and electric wiring pattern formed on the glass substrate include titanium nitride (T i N), nickel (N i), aluminum (A 1), chromium (Cr), and copper ( It can be formed by a conductive metal layer made of Cu), silver (Ag), gold (Au), or an alloy thereof.
- a metal layer may be a single metal layer, or may be a composite film or a laminated film.
- a metal film can be formed by a method such as evaporation, CVD, plating, or sputtering, and desired patterning can be performed on a glass substrate by a photolithography-etching process. .
- a mask having a desired pattern is provided on a glass substrate, and then a metal layer is formed by the above-described method and the mask is removed. If necessary, a further bump electrode may be formed on the wiring board 20.
- the IC chip of the signal processing element 30 on which the bump electrode 31 is formed is aligned with the electrode pad 22 provided on the output surface 20b of the wiring board 20. And connect them physically and electrically. Further, the PD array 15 on which the bump electrodes 17 are formed is aligned with respect to the input portion 21 a of the conductive member 21 provided on the input surface 20 a of the wiring board 20 and functioning as an electrode pad, Connect them physically and electrically.
- Examples of the bump material for forming the bump electrodes 31, 17 include nickel (Ni), copper (Cu), silver (Ag), gold (Au), solder, a resin containing a conductive filler, or a resin containing them. Or a layered structure.
- An under bump metal (U) is placed between the bump electrode and the electrode pad below it.
- BM may be interposed.
- the housing 40 on which the bump electrodes 44 are formed is aligned with the electrode pads 24 provided on the output surface 20b of the wiring board 20. Physically and electrically. As described above, signals can be input / output to / from an external circuit via the leads 43 provided on the housing 40. Further, by mounting the scintillator 10 via the optical adhesive 11 on the light incident surface 15a of the PD array 15, the radiation detector shown in FIG. 1 is obtained.
- the photodiode formed on the light incident surface (front surface) 15a has a photodiode.
- a back-illuminated type in which a photo diode is formed on the signal output surface (rear surface) 15b may be used. Further, the number, arrangement, and the like of the photodiodes serving as the light detection elements may be appropriately set.
- the configuration for outputting the detection signal from the photodiode from the output surface 15b may be, for example, formed on the output surface 15b according to the specific configuration of the PD array.
- a configuration using a wiring pattern or a configuration using a penetrating electrode formed in the PD array 15 can be used.
- the radiation detection unit 1 has a configuration in which a scintillator 10 that generates scintillation light upon incidence of radiation, and a scintillation from the scintillator 10
- a configuration including a PD array 15 provided with a photodiode 16 which is a semiconductor light detection element for detecting light is used.
- Such a configuration is an indirect detection type in which incident X-rays and other radiation are converted into light of a predetermined wavelength (for example, visible light) by a scintillator 10 and then detected by a semiconductor photodetector such as an Si-PD array. It is a structure of.
- This Configuration described is a configuration of a direct detection type for detecting in the semiconductor detection device comprising a radiation such incident X-rays and the like C d T e and C d Z n T e.
- Si can also be realized by making the thickness sufficiently large so as to be completely depleted, or by adopting a structure that allows incidence from the back surface.
- the semiconductor device is constituted by the semiconductor detection element array and the wiring board.
- the semiconductor device having the above configuration including the semiconductor element and the wiring board is applicable to various devices other than the radiation detector.
- the semiconductor element an element other than the semiconductor light detection element and the semiconductor detection element may be used.
- a signal processing element is connected to the signal output surface of the wiring board to process the semiconductor element and an electric signal from the semiconductor element.
- the semiconductor device may be one in which the signal processing element to be integrated is integrated via a wiring board.
- connection between the wiring board 20 and the signal processing element 30 and the like as in the above-described embodiment, it is possible to use a direct bonding method by electrical connection via bump electrodes. preferable. By using such a metal bump electrode as an electrical connection means, each part can be suitably electrically connected.
- the signal processing element 30 is provided on the output surface 2 O b of the wiring board 20 separately from the output section 21 b of the conductive member 21. Electrode pads 22 for connection are provided. This electrode pad may be configured such that the output portion 21b of the conductive member 21 is used as it is as an electrode pad.
- ACF anisotropic conductive film
- ACP conductive paste
- NCP non-conductive paste
- the semiconductor device according to the present invention and the radiation detector using the same provide a semiconductor device in which a semiconductor element and a corresponding conductive path on a wiring board are satisfactorily connected. It can be used as an apparatus and a radiation detector using the same. That is, a glass substrate integrally formed from a plurality of glass fibers and having a through hole from an input surface to an output surface at a predetermined position is used as a wiring substrate for connecting a semiconductor element. According to the configuration in which the bump electrodes of the semiconductor element correspond one-to-one with the conductive member and the semiconductor element is connected to the conductive member that is a conductive path on the wiring board, the semiconductor element is mounted on the wiring board. At this time, part of the bump electrode enters the inside of the through hole provided with the conductive member. As a result, a semiconductor device is realized in which the semiconductor element and the corresponding conductive path on the wiring board are satisfactorily connected via the bump electrodes.
- the semiconductor element and the corresponding conductive member on the wiring board are satisfactorily connected to each other. This realizes a radiation detector capable of reliably transmitting a detection signal from the signal processing means to the signal processing means and processing the detection signal in the signal processing means.
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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DE602004020452T DE602004020452D1 (de) | 2003-02-24 | 2004-02-24 | Halbleiterbauelement und strahlungsdetektor damit |
EP04714020A EP1598862B1 (en) | 2003-02-24 | 2004-02-24 | Semiconductor device and radiation detector employing it |
US10/546,601 US7545044B2 (en) | 2003-02-24 | 2004-02-24 | Semiconductor device and radiation detector employing it |
IL170456A IL170456A (en) | 2003-02-24 | 2005-08-23 | Semiconductor device and radiation detector using the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003046141A JP4138529B2 (ja) | 2003-02-24 | 2003-02-24 | 半導体装置、及びそれを用いた放射線検出器 |
JP2003-046141 | 2003-02-24 |
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WO2004075281A1 true WO2004075281A1 (ja) | 2004-09-02 |
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PCT/JP2004/002132 WO2004075281A1 (ja) | 2003-02-24 | 2004-02-24 | 半導体装置、及びそれを用いた放射線検出器 |
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US (1) | US7545044B2 (ja) |
EP (1) | EP1598862B1 (ja) |
JP (1) | JP4138529B2 (ja) |
KR (1) | KR100997035B1 (ja) |
CN (1) | CN100383942C (ja) |
DE (1) | DE602004020452D1 (ja) |
IL (1) | IL170456A (ja) |
TW (1) | TW200428546A (ja) |
WO (1) | WO2004075281A1 (ja) |
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- 2004-02-24 CN CNB2004800050039A patent/CN100383942C/zh not_active Expired - Fee Related
- 2004-02-24 US US10/546,601 patent/US7545044B2/en not_active Expired - Fee Related
- 2004-02-24 WO PCT/JP2004/002132 patent/WO2004075281A1/ja active Application Filing
- 2004-02-24 KR KR1020057015706A patent/KR100997035B1/ko not_active IP Right Cessation
- 2004-02-24 TW TW093104573A patent/TW200428546A/zh unknown
- 2004-02-24 DE DE602004020452T patent/DE602004020452D1/de not_active Expired - Lifetime
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US11671726B2 (en) | 2017-07-25 | 2023-06-06 | Sony Semiconductor Solutions Corporation | Solid-state imaging device |
Also Published As
Publication number | Publication date |
---|---|
US20070029670A1 (en) | 2007-02-08 |
IL170456A (en) | 2010-05-17 |
KR100997035B1 (ko) | 2010-11-26 |
DE602004020452D1 (de) | 2009-05-20 |
US7545044B2 (en) | 2009-06-09 |
KR20050105241A (ko) | 2005-11-03 |
JP2004265948A (ja) | 2004-09-24 |
CN1754254A (zh) | 2006-03-29 |
EP1598862B1 (en) | 2009-04-08 |
JP4138529B2 (ja) | 2008-08-27 |
CN100383942C (zh) | 2008-04-23 |
EP1598862A1 (en) | 2005-11-23 |
TW200428546A (en) | 2004-12-16 |
EP1598862A4 (en) | 2006-12-06 |
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