WO2014083727A1 - スパッタリング装置および基板処理装置 - Google Patents
スパッタリング装置および基板処理装置 Download PDFInfo
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- WO2014083727A1 WO2014083727A1 PCT/JP2013/004974 JP2013004974W WO2014083727A1 WO 2014083727 A1 WO2014083727 A1 WO 2014083727A1 JP 2013004974 W JP2013004974 W JP 2013004974W WO 2014083727 A1 WO2014083727 A1 WO 2014083727A1
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/34—Gas-filled discharge tubes operating with cathodic sputtering
- H01J37/3411—Constructional aspects of the reactor
- H01J37/3447—Collimators, shutters, apertures
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/3407—Cathode assembly for sputtering apparatus, e.g. Target
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
- C23C14/352—Sputtering by application of a magnetic field, e.g. magnetron sputtering using more than one target
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/50—Substrate holders
- C23C14/505—Substrate holders for rotation of the substrates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/34—Gas-filled discharge tubes operating with cathodic sputtering
- H01J37/3402—Gas-filled discharge tubes operating with cathodic sputtering using supplementary magnetic fields
- H01J37/3405—Magnetron sputtering
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/34—Gas-filled discharge tubes operating with cathodic sputtering
- H01J37/3411—Constructional aspects of the reactor
- H01J37/3414—Targets
- H01J37/3426—Material
- H01J37/3429—Plural materials
Definitions
- the present invention relates to a sputtering apparatus and a substrate processing apparatus.
- Patent Document 1 describes a configuration in which a plurality of sputtering apparatuses are arranged around a transfer chamber. In each sputtering apparatus, four targets are arranged on the ceiling of the container constituting the film forming chamber. A double-rotation shutter mechanism is disposed between these targets and the substrate holder.
- 20 and 21 schematically show a sputtering apparatus having a plurality of targets arranged at equal intervals and a double rotation shutter mechanism for selecting a target to be used for sputtering among the plurality of targets.
- Has been. 20 and 21 are prepared by the inventors of the present application and do not constitute prior art.
- FIG. 20 schematically shows a state in which sputtering (co-sputtering) is performed using two targets T1 and T3 at the same time among targets T1, T2, and T3 arranged at equal intervals.
- the double rotation shutter mechanism includes a first shutter S1 and a second shutter S2.
- the first shutter S1 has two openings OP11 and OP12
- the second shutter S2 has two openings OP21 and OP22.
- the rotation angle of the first shutter S1 is controlled so that the two openings OP11 and OP12 face the targets T1 and T3, respectively, and the second shutter S2 has the two openings OP21 and OP22 that face the targets T1 and T3, respectively.
- the rotation angle is controlled.
- the material radiated from the targets T1 and T3 passes through the openings OP11 and OP12 of the first shutter S1 and the openings OP21 and OP22 of the second shutter S2, and reaches the substrate SUB, whereby a film is formed on the substrate SUB.
- FIG. 21 schematically shows a state in which sputtering is performed using one target T1 among targets T1, T2, and T3 arranged at equal intervals.
- the rotation angle of the first shutter S1 is controlled so that the two openings OP11 and OP12 face the targets T1 and T3, respectively, and the second shutter S2 has the two openings OP21 and OP22 that face the targets T2 and T1, respectively.
- the rotation angle is controlled.
- the material radiated from the target T1 passes through the opening OP11 of the first shutter S1 and the opening OP22 of the second shutter S2, and reaches the substrate SUB, whereby a film is formed on the substrate SUB.
- the material radiated from the target T1 passes through the opening OP11 of the first shutter S1, and then between the first shutter S1 and the second shutter S2. , Further passes through the opening OP12 of the second shutter S2, reaches the target T3, and can adhere to the surface of the target T3. Thereby, the target T3 may be contaminated.
- the present invention has been made with the recognition of the above problems as an opportunity, and it is an object of the present invention to provide a technique advantageous in reducing target contamination.
- a chamber capable of holding a substrate in the chamber, and rotatable about an axis orthogonal to a surface holding the substrate, and a target, respectively.
- a sputtering unit including a shutter unit for selecting a target to be used for sputtering among a plurality of targets respectively held by the plurality of target holders,
- the shutter unit includes a first shutter and a second shutter that are rotatable about the axis and are spaced apart from each other in a direction along the axis, and the plurality of target holders are centered on the axis.
- the plurality of tars arranged on the first virtual circle and on the first virtual circle Arrangement interval of Ttohoruda comprises at least two types of arrangement interval
- the first shutter has a first opening and a second opening, and the centers of the first opening and the second opening are arranged on a second virtual circle centered on the axis
- the second shutter has a third opening and a fourth opening, and a center of each of the third opening and the fourth opening is disposed on a third virtual circle centered on the axis, and the first opening and the
- the center angle with the respective centers of the second openings as the ends of the arc on the second imaginary circle is the center angles of the third openings and the fourth openings as the ends of the arc on the third imaginary circle. It is equal to the central angle, and is equal to the central angle having the respective centers of the first target holder and the second target holder having the largest interval on the first imaginary circle among the plurality of target holders as the ends of the arc. .
- a second aspect of the present invention relates to a substrate processing apparatus, and the substrate processing apparatus includes a transfer chamber having a plurality of connection surfaces, and a sputtering apparatus connected to at least one of the plurality of connection surfaces.
- the sputtering apparatus is a sputtering apparatus according to the first side surface, and an angle formed by adjacent connection surfaces among the plurality of connection surfaces is greater than 90 degrees.
- the typical top view of the sputtering device of a 1st embodiment of the present invention The typical sectional view of the sputtering device of a 1st embodiment of the present invention.
- the figure which shows the structural example of a 2nd shutter. The figure which illustrates control of the positional relationship of a target, the opening of a 1st shutter, and the opening of a 2nd shutter.
- the figure which illustrates control of the positional relationship of a target, the opening of a 1st shutter, and the opening of a 2nd shutter The figure which illustrates control of the positional relationship of a target, the opening of a 1st shutter, and the opening of a 2nd shutter.
- the figure which illustrates control of the positional relationship of a target, the opening of a 1st shutter, and the opening of a 2nd shutter The figure which illustrates control of the positional relationship of a target, the opening of a 1st shutter, and the opening of a 2nd shutter.
- the figure which illustrates control of the positional relationship of a target, the opening of a 1st shutter, and the opening of a 2nd shutter The figure which illustrates control of the positional relationship of a target, the opening of a 1st shutter, and the opening of a 2nd shutter.
- the figure which illustrates control of the positional relationship of a target, the opening of a 1st shutter, and the opening of a 2nd shutter The figure which illustrates control of the positional relationship of a target, the opening of a 1st shutter, and the opening of a 2nd shutter.
- the figure which illustrates control of the positional relationship of a target, the opening of a 1st shutter, and the opening of a 2nd shutter The figure which illustrates control of the positional relationship of a target, the opening of a 1st shutter, and the opening of a 2nd shutter.
- the figure which illustrates control of the positional relationship of a target, the opening of a 1st shutter, and the opening of a 2nd shutter The figure which illustrates control of the positional relationship of a target, the opening of a 1st shutter, and the opening of a 2nd shutter.
- the figure which illustrates control of the positional relationship of a target, the opening of a 1st shutter, and the opening of a 2nd shutter The figure which illustrates control of the positional relationship of a target, the opening of a 1st shutter, and the opening of a 2nd shutter.
- 1 is a cross-sectional view of a substrate processing apparatus according to one embodiment of the present invention.
- FIG. 1A is a schematic plan view of the sputtering apparatus 100 according to the first embodiment of the present invention.
- FIG. 1B is a schematic cross-sectional view of the sputtering apparatus 100 taken along the line XX ′ of FIG. 1A.
- the sputtering apparatus 100 includes a chamber 7, a substrate holder 108, and first to third target holders 91, 92, 93 as a plurality of target holders.
- the substrate holder 108 can hold the substrate 109 in the chamber 7 and can rotate about an axis 8 orthogonal to the surface of the substrate 109.
- the first to third target holders 91, 92, 93 hold the targets T1, T2, T3, respectively.
- the first to third target holders 91, 92, 93 as a plurality of target holders are clockwise along the first virtual circle VC ⁇ b> 1 centering on the axis 8.
- the target holder 92 and the third target holder 93 are arranged in this order.
- the arrangement intervals of the first to third target holders 91, 92, 93 on the first virtual circle VC1 are at least two types.
- the arrangement interval between the first target holder 91 and the second target holder 92 on the first virtual circle VC1 is D12
- Is D23, and the arrangement interval between the third target holder 93 and the first target holder 91 on the first virtual circle VC1 is D31.
- D12 D31> D23
- D12, D23, and D31 are all different, there are three types of arrangement intervals of the first to third target holders 91, 92, 93 on the first virtual circle VC1.
- the sputtering apparatus 100 is provided with a gate valve 6, and the substrate 109 is transferred between the internal space and the external space of the chamber 7 via the gate valve 6.
- the sputtering apparatus 100 also includes a shutter unit SU for selecting a target to be used for sputtering among the targets T1, T2, and T3 held by the first to third target holders 91, 92, and 93, respectively.
- the shutter unit SU can include a first shutter 111 and a second shutter 112 that can rotate about the axis 8 and a drive unit 110 that rotates the first shutter 111 and the second shutter 112 individually.
- the first shutter 111 and the second shutter 112 each have two openings, and can perform sputtering (co-sputtering) using two targets simultaneously.
- the first shutter 111 has a first opening H1 and a second opening H2 centered on a second virtual circle VC2 centered on the axis 8.
- the second shutter 112 has a third opening H3 and a fourth opening H4 that are centered on a third virtual circle VC3 centered on the axis 8.
- the drive unit 110 includes the first shutter 111 and the target T1, T2, and T3 so that the target used for sputtering is exposed to the substrate 109 through the opening of the first shutter 111 and the opening of the second shutter 112.
- the second shutter 112 is driven.
- the first shutter 111 and the second shutter 112 may be spaced apart from each other in the direction along the axis 8.
- the first shutter 111 is disposed between the target holders 91, 92, 93 and the second shutter 112.
- the central angle ⁇ H12 having the respective centers of the first opening H1 and the second opening H2 of the first shutter 111 as both ends of the arc on the second virtual circle VC2 is the third opening H3 and the fourth opening H4 of the second shutter 112.
- the center angle ⁇ H34 having the respective centers of the arcs on both ends of the arc on the third virtual circle VC3 is the largest 2 It is equal to the central angle with the center of each of the first target holder 91 and the second target holder 92 being the two ends of the arc.
- the third target holder 93 and the first target holder 91 are the first of the plurality of target holders 91, 92, 93. Two targets having the largest distance on one virtual circle VC1.
- a magnet unit 80 is disposed on the back side of each of the targets 91, 92, 93.
- Each magnet unit 80 may include a magnet 82 for generating magnetron discharge (for example, DC magnetron discharge) and a drive unit 83 for driving (for example, rotating) the magnet 82.
- Each magnet unit 80 can also include a distance adjusting unit 84 for adjusting the distance between the magnet 82 and the target holder (target).
- Each of the target holders 91, 92, 93 is configured to hold the targets T 1, T 2, T 3 in a posture in which the surfaces of the targets T 1, T 2, T 3 are inclined with respect to the surface of the substrate 109 held by the substrate holder 108. Can be done.
- each of the target holders 91, 92, 93 can hold the targets T 1, T 2, T 3 so that the normal lines of the surfaces of the targets T 1, T 2, T 3 are directed toward the center of the substrate 109.
- the magnet unit 80 can be disposed so as to be inclined so that the upper portion thereof is away from the shaft 8.
- a direction (hereinafter, referred to as a direction orthogonal to the transfer direction of the substrate 109 between the transfer chamber 400 and the sputtering apparatus 100).
- the dimensions of the sputtering apparatus 100 in the “width direction” should be reduced.
- the occupation area of the sputtering apparatus 100 can be determined by the upper part of the magnet unit 80.
- the first to third target holders 91, 92, 93 are arranged so that the first target holder 91 is closest to the gate valve 6. It is preferable to arrange.
- each target is tilted toward the substrate.
- the targets T1, T2, T3, and the first shutter 111 are set.
- the openings H1 and H2 and the openings H3 and H4 of the second shutter 112 are shown in parallel to each other.
- FIGS. 6A to 6C are cross-sectional views illustrating targets T1, T2, and T3, openings H1 and H2 of the first shutter 111, and openings H3 and H4 of the second shutter 112 along the first virtual circle VC1.
- the positional relationship control exemplified in FIGS. 3A to 6C can be performed by the controller shown in FIG.
- the target indicated by shading is a target used for sputtering
- the target indicated by a solid white line or white dotted line is used for sputtering.
- a target indicated by a solid white line is a target at the same position as the opening of the first shutter 111 or the opening of the second shutter 112.
- a target indicated by a white dotted line is a target at a position different from both the opening of the first shutter 111 and the opening of the second shutter 112.
- 3A, 3B, and 6A illustrate a state where one target T3 is used for sputtering among the targets T1, T2, and T3.
- the problem of contamination as described with reference to FIG. 21, specifically, the target T3 is emitted.
- the material passes through the second opening H2, then moves between the first shutter 111 and the second shutter 112, and further passes through the first opening H1 to reach the target T2, causing a problem of contaminating the target T2. sell.
- the central angle ⁇ H12 having the respective centers of the first opening H1 and the second opening H2 of the first shutter 111 as both ends of the arc on the second virtual circle VC2 has a plurality of target holders 91,
- the center angles of the first target holder 91 and the second target holder 92, which are the two targets having the largest distance between each other on the first virtual circle VC1 out of the arcs 92 and 93, are equal to the center angles having both ends of the arc. Accordingly, when sputtering is performed using only the target T3, the first opening H1 of the first shutter 111 is disposed at a position shifted from the front of the target T2 (position shifted in a direction away from the target T3). Contamination of the target T2 is reduced. In this case, the first opening H1 of the first shutter 111 is disposed at a position shifted from any of the front surfaces of the targets T1, T2, and T3.
- FIG. 4A, FIG. 4B, and FIG. 6B illustrate a state where one target T2 is used for sputtering among the targets T1, T2, and T3.
- the first opening H1 of the first shutter 111 is disposed in front of the target T2, and the second opening H2 is shifted from the front of the target T1 (away from the target T2). (Position shifted in the direction), thereby reducing contamination of the target T1.
- FIG. 5A, FIG. 5B, and FIG. 6C illustrate a state in which the targets T1, T2 among the targets T1, T2, T3, T4 are simultaneously used for sputtering (that is, a state in which co-sputtering is performed). ing.
- FIG. 19 illustrates a substrate processing apparatus in which one or a plurality of sputtering apparatuses 100 are arranged around the transfer chamber 400.
- the transfer chamber 400 has a plurality of connection surfaces 401.
- the sputtering apparatus 100 is connected to at least one of the plurality of connection surfaces 401.
- the transfer chamber 400 and the sputtering apparatus 100 are connected via the gate valve 6.
- the angle A formed by the connection surfaces 401 adjacent to each other among the plurality of connection surfaces 401 is preferably larger than 90 degrees, so that more sputtering apparatuses 100 can be arranged around the transfer chamber 400.
- FIG. 7A is a schematic plan view of a sputtering apparatus 200 according to the second embodiment of the present invention.
- FIG. 7B is a schematic cross-sectional view of the sputtering apparatus 200 taken along the line XX ′ of FIG. 7A.
- the sputtering apparatus 200 includes a chamber 7, a substrate holder 108, and first to fifth target holders 91, 92, 93, 94, 95 as a plurality of target holders.
- the substrate holder 108 can hold the substrate 109 in the chamber 7 and can rotate about an axis 8 orthogonal to the surface of the substrate 109.
- the first to fifth target holders 91, 92, 93, 94, and 95 hold the targets T1, T2, T3, T4, and T5, respectively.
- the first to fifth target holders 91, 92, 93, 94, 95 as a plurality of target holders are clockwise along the first virtual circle VC 1 centering on the axis 8. 91, the second target holder 92, the third target holder 93, the fourth target holder 94, and the fifth target holder 95 are arranged in this order.
- the arrangement intervals of the first to fifth target holders 91, 92, 93, 94, 95 on the first virtual circle VC1 are at least two types.
- the arrangement interval between the first target holder 91 and the second target holder 92 on the first virtual circle VC1 is D12
- D23, the arrangement interval between the third target holder 93 and the fourth target holder 94 on the first virtual circle VC1 and the arrangement interval between the fourth target holder 94 and the fifth target holder 95 on the first virtual circle VC1.
- Is D45, and the arrangement interval between the fifth target holder 95 and the first target holder 91 on the first virtual circle VC1 is D51.
- D12, D23, D34, D45, and D51 are all different, there are five types of arrangement intervals of the first to fifth target holders 91, 92, 93, 94, and 95 on the first virtual circle VC1.
- the sputtering apparatus 200 is provided with a gate valve 6, and the substrate 109 is transferred between the internal space of the chamber 7 and the external space via the gate valve 6.
- the sputtering apparatus 200 also selects a target to be used for sputtering among the targets T1, T2, T3, T4, and T5 held by the first to fifth target holders 91, 92, 93, 94, and 95, respectively.
- the shutter unit SU can include a first shutter 111 and a second shutter 112 that can rotate about the axis 8 and a drive unit 110 that rotates the first shutter 111 and the second shutter 112 individually.
- the first shutter 111 and the second shutter 112 each have two openings, and can perform sputtering (co-sputtering) using two targets simultaneously.
- the first shutter 111 has a first opening H1 and a second opening H2 centered on a second virtual circle VC2 centered on the axis 8.
- the second shutter 112 has a third opening H3 and a fourth opening H4 that are centered on a third virtual circle VC3 with the axis 8 as the center.
- the driving unit 110 includes first targets T1, T2, T3, T4, and T5 that are used for sputtering so that the target is exposed to the substrate 109 through the opening of the first shutter 111 and the opening of the second shutter 112.
- the first shutter 111 and the second shutter 112 are driven.
- the first shutter 111 and the second shutter 112 may be spaced apart from each other in the direction along the axis 8.
- the first shutter 111 is disposed between the target holders 91, 92, 93, 94, 95 and the second shutter 112.
- the central angle ⁇ H12 having the respective centers of the first opening H1 and the second opening H2 of the first shutter 111 as both ends of the arc on the second virtual circle VC2 is the third opening H3 and the fourth opening H4 of the second shutter 112.
- a center angle ⁇ H34 having the respective centers of the arcs on both ends of the arc on the third virtual circle VC3 and among the plurality of target holders 91, 92, 93, 94, 95, the distance between them on the first virtual circle VC1 Is equal to the central angle with the center of each of the first target holder 91 and the second target holder 92 being the two largest targets as arc ends.
- the fifth target holder 95 and the first target holder 91 include a plurality of target holders 91, 92,
- the two targets 93, 94, and 95 have the largest mutual distance on the first virtual circle VC1.
- FIGS. 9A to 12C are cross-sectional views illustrating targets T1, T2, T3, T4, and T5, openings H1 and H2 of the first shutter 111, and openings H3 and H4 of the second shutter 112 along the first virtual circle VC1. It is.
- the positional relationship control exemplified in FIGS. 9A to 12C can be performed by the controller shown in FIG.
- the target indicated by shading is a target that is used for sputtering, and the target indicated by a solid white line or white dotted line is used for sputtering. Not a target.
- a target indicated by a solid white line is a target at the same position as the opening of the first shutter 111 or the opening of the second shutter 112.
- a target indicated by a white dotted line is a target at a position different from both the opening of the first shutter 111 and the opening of the second shutter 112.
- FIG. 9A, FIG. 9B, and FIG. 12A illustrate a state where one target T2 is used for sputtering among the targets T1, T2, T3, T4, and T5.
- the problem of contamination as described with reference to FIG. 21 specifically, the radiation from the target T2 is emitted.
- the material passes through the first opening H1, then moves between the first shutter 111 and the second shutter 112, and further passes through the second opening H2 to reach the target T3, causing a problem of contaminating the target T3. sell.
- the central angle ⁇ H12 having the respective centers of the first opening H1 and the second opening H2 of the first shutter 111 as both ends of the arc on the second virtual circle VC2 has a plurality of target holders 91, 92, 93, 94, 95, center angles having the respective centers of the first target holder 91 and the second target holder 92, which are the two targets having the largest distance on the first virtual circle VC1, as both ends of the arc.
- the second opening H2 of the first shutter 111 is disposed at a position shifted from the front of the target T3 (position shifted in a direction away from the target T2). Contamination of the target T3 is reduced.
- the second opening H2 of the first shutter 111 is arranged at a position shifted from any of the front surfaces of the targets T1, T2, T3, T4, and T5.
- FIG. 10A, FIG. 1B, and FIG. 12B illustrate a state where one target T5 is used for sputtering among the targets T1, T2, T3, T4, and T5.
- the second opening H2 of the first shutter 111 is disposed in front of the target T5, and the first opening H1 is shifted from the front of the target T4 (away from the target T5). (Position shifted in the direction), thereby reducing the contamination of the target T4.
- FIG. 11A, FIG. 11B, and FIG. 12C show a state in which the targets T1, T2 among the targets T1, T2, T3, T4, T5 are simultaneously used for sputtering (that is, a state in which simultaneous sputtering is performed). Illustrated.
- the sputtering apparatus 200 of the second embodiment can also be applied to the substrate processing apparatus illustrated in FIG.
- 13A and 13B are a schematic plan view and a cross-sectional view of a sputtering apparatus 300 according to the third embodiment of the present invention.
- the sputtering apparatus 300 includes a chamber 7, a substrate holder 108, and first to fourth target holders 91, 92, 93, 94 as a plurality of target holders.
- first to third embodiments examples in which the number of target holders is three or more are described.
- the substrate holder 108 can hold the substrate 109 in the chamber 7 and can rotate about an axis 8 orthogonal to the surface of the substrate 109.
- the first to fourth target holders 91, 92, 93, and 94 hold the targets T1, T2, T3, and T4, respectively.
- the first to fourth target holders 91, 92, 93, 94 as a plurality of target holders are clockwise along the first virtual circle VC ⁇ b> 1 with the axis 8 as the center,
- the second target holder 92, the third target holder 93, and the fourth target holder 94 are arranged in this order.
- the arrangement interval of the first to fourth target holders 91, 92, 93, 94 on the first virtual circle VC1 is at least two types.
- the arrangement interval between the first target holder 91 and the second target holder 92 on the first virtual circle VC1 is D12
- D23, the arrangement interval between the third target holder 93 and the fourth target holder 94 on the first virtual circle VC1 is the arrangement interval between the fourth target holder 94 and the first target holder 91 on the first virtual circle VC1. Is D41.
- D12, D23, D34, and D45 are all different, there are four types of arrangement intervals of the first to fourth target holders 91, 92, 93, and 94 on the first virtual circle VC1.
- the sputtering apparatus 300 is provided with a gate valve 6, and the substrate 109 is transferred between the internal space and the external space of the chamber 7 via the gate valve 6.
- the sputtering apparatus 300 also has a shutter unit SU for selecting a target to be used for sputtering among the targets T1, T2, T3, and T4 held by the first to fourth target holders 91, 92, 93, and 94, respectively. It has.
- the shutter unit SU can include a first shutter 111 and a second shutter 112 that can rotate about the axis 8 and a drive unit 110 that rotates the first shutter 111 and the second shutter 112 individually.
- the first shutter 111 and the second shutter 112 each have two openings, and can perform sputtering (co-sputtering) using two targets simultaneously.
- the first shutter 111 has a first opening H1 and a second opening H2 centered on a second virtual circle VC2 centered on the axis 8.
- the second shutter 112 has a third opening H3 and a fourth opening H4 that are centered on a third virtual circle VC3 centered on the axis 8.
- the driving unit 110 includes a first shutter such that a target used for sputtering among the targets T1, T2, T3, and T4 is exposed to the substrate 109 through the opening of the first shutter 111 and the opening of the second shutter 112. 111 and the second shutter 112 are driven.
- the first shutter 111 and the second shutter 112 may be spaced apart from each other in the direction along the axis 8.
- the first shutter 111 is disposed between the target holders 91, 92, 93, 94 and the second shutter 112.
- the central angle ⁇ H12 having the respective centers of the first opening H1 and the second opening H2 of the first shutter 111 as both ends of the arc on the second virtual circle VC2 is the third opening H3 and the fourth opening H4 of the second shutter 112. Is equal to the center angle ⁇ H34 having the respective centers of the arcs on both ends of the arc on the third virtual circle VC3, and the interval between the plurality of target holders 91, 92, 93, 94 on the first virtual circle VC1 is the largest.
- the center angle of each of the first target holder 91 and the second target holder 92, which are two large targets, is equal to the center angle with both ends of the arc.
- the third target holder 93 and the fourth target holder 94 include a plurality of target holders 91, 92, 93, Among the two targets 94, the distance between them on the first virtual circle VC1 is the largest.
- FIGS. 15A to 18C are cross-sectional views illustrating targets T1, T2, T3, and T4, openings H1 and H2 of the first shutter 111, and openings H3 and H4 of the second shutter 112, along the first virtual circle VC1. .
- the positional relationship control exemplified in FIGS. 15A to 18C can be performed by the controller shown in FIG.
- the target indicated by shading is a target that is used for sputtering, and the target indicated by a solid white line or white dotted line is used for sputtering. Not a target.
- a target indicated by a solid white line is a target at the same position as the opening of the first shutter 111 or the opening of the second shutter 112.
- a target indicated by a white dotted line is a target at a position different from both the opening of the first shutter 111 and the opening of the second shutter 112.
- FIG. 15A, FIG. 15B, and FIG. 18A illustrate a state where one target T1 is used for sputtering among the targets T1, T2, T3, T4, and T5.
- the material passes through the second opening H2, then moves between the first shutter 111 and the second shutter 112, and further passes through the first opening H1 to reach the target T4, causing a problem of contaminating the target T4. sell.
- the central angle ⁇ H12 having the respective centers of the first opening H1 and the second opening H2 of the first shutter 111 as both ends of the arc on the second virtual circle VC2 has a plurality of target holders 91, 92, 93, and 94 are equal to the central angle with the center of each of the first target holder 91 and the second target holder 92 being the two targets having the largest distance on the first virtual circle VC1 as both ends of the arc. .
- the first opening H1 of the first shutter 111 is disposed at a position shifted from the front of the target T4 (position shifted in a direction away from the target T1), thereby Contamination of the target T3 is reduced.
- the first opening H1 of the first shutter 111 is disposed at a position shifted from any of the front surfaces of the targets T1, T2, T3, and T4.
- FIG. 16A, FIG. 16B, and FIG. 18B illustrate a state where one target T4 is used for sputtering among the targets T1, T2, T3, and T4.
- the first opening H1 of the first shutter 111 is disposed in front of the target T4, and the second opening H2 is shifted from the front of the target T1 (away from the target T4). (Position shifted in the direction), thereby reducing contamination of the target T1.
- the 3rd opening H3 is located in front of target T3, since shutter 111 exists, possibility that target T3 will be contaminated through 3rd opening H3 is low.
- the second opening H2 that is not opposed to the target T4 in the shutter 111 provided on the target side is shifted from the front of any of the other targets T1, T2, and T3.
- FIG. 17A, FIG. 17B, and FIG. 18C illustrate a state in which the targets T1 and T2 among the targets T1, T2, T3, and T4 are simultaneously used for sputtering (that is, a state in which simultaneous sputtering is performed). ing.
- the dimensions of the sputtering apparatus 300 in the width direction should be reduced.
- the occupation area of the sputtering apparatus 100 can be determined by the upper part of the magnet unit 80.
- the target holders 91, 92, 93, 94 should be arranged compressed in the width direction.
- the first to fourth target holders 91, 92, 93, 94 are on one virtual circle VC centered on the axis 8, and the long side LS and the short side
- the first target holder 91 and the fourth target holder 94 are arranged on two vertices defining one short side SS of the virtual rectangle VR.
- the distance to the gate valve 6 is smaller than the distance from the second target holder 92 and the third target holder 93 to the gate valve 6.
- the target holders 91, 92, 93, and 94 are arranged compressed in the width direction, whereby the dimensions of the sputtering apparatus 100 in the width direction can be reduced. This allows more sputtering apparatus 100 to be placed around the transfer chamber. Further, according to the above arrangement, the magnetic fields formed on the surfaces of the targets T1, T2, T3, T4 respectively held by the first to fourth target holders 91, 92, 93, 94 are equal to each other. .
- the influence of the magnetic field formed on the surface of the target T1 held by the target holder 91 from the magnet 82 disposed on the back side of the targets T2, T3, T4 held by the target holders 92, 93, 94 is equivalent to the influence received from the magnet 82 arranged on the back side of the targets T1, T3, T4 held by the target holders 91, 93, 94. is there. That is, by arranging the first to fourth target holders 91, 92, 93, and 94 (centers thereof) at the vertices of the virtual rectangle VR, the magnetic fields formed on the surfaces of the targets T1, T3, and T4 are mutually changed. Can be equal. Thereby, the difference in sputtering characteristics that can occur depending on the position of the target to be used can be reduced.
- the sputtering apparatus 300 of the third embodiment can also be applied to the substrate processing apparatus illustrated in FIG.
- the controller 500 includes an input unit 500b, a storage unit 500c having a program and data, a processor 500d, and an output unit 500e, and can control the sputtering apparatuses 100, 200, and 300.
- the controller 500 can control the operations of the sputtering apparatuses 100, 200, and 300 by causing the processor 500 d to read and execute a control program stored in the storage unit 500 c. That is, under the control of the controller 500, the driving unit 110 can be operated to operate the first shutter 111 and the second shutter 112.
- controller 500 may be provided separately from the sputtering apparatuses 100, 200, and 300, or may be incorporated in the sputtering apparatuses 100, 200, and 300.
- controller 400 is connected to a power source that controls the power applied to each target provided in the sputtering apparatus 100, 200, 300 (that is, the power applied to each target holder), and supplies power to each target.
- the drive unit 110 can be controlled.
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Abstract
Description
前記第1シャッターは、第1開口および第2開口を有し、前記第1開口および前記第2開口のそれぞれの中心は、前記軸を中心とする第2仮想円上に配置され、前記第2シャッターは、第3開口および第4開口を有し、前記第3開口および前記第4開口のそれぞれの中心は、前記軸を中心とする第3仮想円上に配置され、前記第1開口および前記第2開口のそれぞれの中心を前記第2仮想円上の弧の両端とする中心角は、前記第3開口および前記第4開口のそれぞれの中心を前記第3仮想円上の弧の両端とする中心角と等しく、且つ、前記複数のターゲットホルダのうち前記第1仮想円上における互いの間隔が最も大きい第1ターゲットホルダおよび第2ターゲットホルダのそれぞれの中心を弧の両端とする中心角と等しい。
Claims (7)
- チャンバと、前記チャンバの中で基板を保持可能であり、前記基板を保持する面に直交する軸を中心として回転可能な基板ホルダと、それぞれターゲットを保持するための複数のターゲットホルダとを有するスパッタリング装置であって、
前記複数のターゲットホルダによってそれぞれ保持される複数のターゲットのうちスパッタリングのために使用するターゲットを選択するためのシャッターユニットを備え、
前記シャッターユニットは、前記軸を中心として回転可能で前記軸に沿った方向に互いに離隔して配置された第1シャッターおよび第2シャッターを含み、
前記複数のターゲットホルダは、前記軸を中心とする第1仮想円上に配置され、前記第1仮想円上における前記複数のターゲットホルダの配置間隔は、少なくとも2種類の配置間隔を含み、
前記第1シャッターは、第1開口および第2開口を有し、前記第1開口および前記第2開口のそれぞれの中心は、前記軸を中心とする第2仮想円上に配置され、前記第2シャッターは、第3開口および第4開口を有し、前記第3開口および前記第4開口のそれぞれの中心は、前記軸を中心とする第3仮想円上に配置され、
前記第1開口および前記第2開口のそれぞれの中心を前記第2仮想円上の弧の両端とする中心角は、前記第3開口および前記第4開口のそれぞれの中心を前記第3仮想円上の弧の両端とする中心角と等しく、且つ、前記複数のターゲットホルダのうち前記第1仮想円上における互いの間隔が最も大きい第1ターゲットホルダおよび第2ターゲットホルダのそれぞれの中心を弧の両端とする中心角と等しい、
ことを特徴とするスパッタリング装置。 - 前記第1シャッターは、前記複数のターゲットホルダと前記第2シャッターとの間に配置され、
前記複数のゲットホルダによってそれぞれ保持される前記複数のターゲットのうち1つのターゲットのみを使ってスパッタリングを行う場合に、前記第1シャッターは、前記第1開口および前記第2開口のうちの一方は前記1つのターゲットの正面に配置され、他方は前記複数のターゲットのいずれの正面からもずれた位置に配置されるように制御される、
ことを特徴とする請求項1に記載のスパッタリング装置。 - 前記チャンバにはゲートバルブが設けられていて、前記ゲートバルブを介して前記チャンバの内部空間と外部空間との間で前記基板が搬送され、
前記複数のターゲットホルダの個数は、3個以上であり、前記複数のターゲットホルダのうち前記第1ターゲットホルダが最も前記ゲートバルブに近接するように前記複数のターゲットホルダが配置されている、
ことを特徴とする請求項1又は2に記載のスパッタリング装置。 - 前記チャンバにはゲートバルブが設けられていて、前記ゲートバルブを介して前記チャンバの内部空間と外部空間との間で前記基板が搬送され、
前記複数のターゲットホルダは、前記第1ターゲットホルダおよび前記第2ターゲットホルダのほか、第3ターゲットホルダおよび第4ターゲットホルダからなり、前記第1仮想円に沿って、前記第1ターゲットホルダ、前記第2ターゲットホルダ、前記第3ターゲットホルダ、前記第4ターゲットホルダの順に配置され、
前記第1仮想円上における前記第1ターゲットホルダと前記第4ターゲットホルダとの間隔は、前記第1仮想円上における前記第1ターゲットホルダと前記第2ターゲットホルダとの間隔より小さく、
前記第1ターゲットホルダおよび前記第4ターゲットホルダは、前記ゲートバルブまでの距離が前記第2ターゲットホルダおよび前記第3ターゲットホルダから前記ゲートバルブまでの距離より小さい、
ことを特徴とする請求項1又は2に記載のスパッタリング装置。 - 前記第1乃至第4ターゲットホルダは、長辺及び短辺を有し前記第1仮想円に内接する仮想長方形の頂点上に配置されている、
ことを特徴とする請求項4に記載のスパッタリング装置。 - 前記第1ターゲットホルダおよび前記第4ターゲットホルダは、前記ゲートバルブまでの距離が互いに等しい、
ことを特徴とする請求項4又は5に記載のスパッタリング装置。 - 複数の接続面を有する搬送チャンバと、
前記複数の接続面の少なくとも1つに接続されたスパッタリング装置と、を備え、
前記スパッタリング装置は、請求項1乃至6のいずれか1項に記載のスパッタリング装置であり、
前記複数の接続面のうち互いに隣接する接続面のなす角度が90度より大きい、
ことを特徴とする基板処理装置。
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