WO2013168825A1 - ガス供給装置及び基板処理装置 - Google Patents
ガス供給装置及び基板処理装置 Download PDFInfo
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- WO2013168825A1 WO2013168825A1 PCT/JP2013/063616 JP2013063616W WO2013168825A1 WO 2013168825 A1 WO2013168825 A1 WO 2013168825A1 JP 2013063616 W JP2013063616 W JP 2013063616W WO 2013168825 A1 WO2013168825 A1 WO 2013168825A1
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- gas
- gas supply
- diffusion chamber
- gas diffusion
- outermost
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67063—Apparatus for fluid treatment for etching
- H01L21/67069—Apparatus for fluid treatment for etching for drying etching
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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
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45563—Gas nozzles
-
- 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
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45563—Gas nozzles
- C23C16/45565—Shower nozzles
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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
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
- H01J37/32091—Radio frequency generated discharge the radio frequency energy being capacitively coupled to the plasma
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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
- H01J37/32431—Constructional details of the reactor
- H01J37/3244—Gas supply means
Definitions
- the present invention relates to a gas supply device and a substrate processing apparatus that distribute and supply gas to a plurality of regions formed by dividing a processing space for processing a substrate.
- wafer a semiconductor device wafer (hereinafter simply referred to as “wafer”) as a substrate is accommodated in a processing chamber and plasma processing is performed on the wafer by plasma generated in the processing chamber, the wafer is uniformly plasma processed. Therefore, it is necessary to uniformly distribute the plasma in the processing space facing the wafer in the processing chamber.
- wafer semiconductor device wafer
- a plurality of gas diffusion chambers are provided corresponding to each of the plurality of regions divided in the shower head facing the processing space, and the processing gas supplied to each gas diffusion chamber is a large number of gases. Although it introduce
- a plate-like manifold (gas distribution plate) 251 in which a plurality of gas supply ports 250 a and 250 b penetrating vertically is provided as shown in FIG. 24 and the gas supply branches to the upper surface of the manifold 251.
- the grooves 252a and 252b are formed, and in each of the gas supply grooves 252a and 252b, the distances from the communication locations 253a and 253b to the gas supply ports (not shown) to the gas supply ports 250a and 250b are set to be the same.
- the processing gas can be supplied from each gas supply port 250a at the same timing and the same pressure, and the processing gas can be supplied from each gas supply port 250b at the same timing and the same pressure.
- each gas distribution plate is formed in one gas distribution plate. Considering interference between the gas supply grooves, the number of gas supply grooves that can be formed is limited. As a result, there is a problem that the number of gas diffusion chambers corresponding to each of the gas supply grooves cannot be increased, and plasma cannot be distributed more uniformly in the processing space.
- An object of the present invention is to provide a gas supply apparatus and a substrate processing apparatus capable of distributing plasma more uniformly in a processing space.
- a gas supply device for supplying gas from a gas supply source to a processing space, the opposing plate facing the processing space and having a plurality of through holes, a plurality of gas distribution plates, and a lid plate
- the counter plate, the plurality of gas distribution plates, and the cover plate are laminated in this order, and a plurality of gas diffusion chambers are provided on the surface of the gas distribution plate closest to the counter plate on the side of the counter plate.
- Each of the gas distribution plates is formed with at least one gas supply path for supplying the gas from the gas supply source to one of the gas diffusion chambers.
- the supply path branches into a plurality of branch paths, and the distance from the gas supply source to the tip of each branch path is the same.
- the conductance of each of the branch paths is preferably the same.
- the gas supply device faces a disk-shaped substrate through the processing space
- the plurality of gas diffusion chambers include a plurality of groove-shaped spaces
- the plurality of groove-shaped spaces are outer edges of the substrate. It is preferably formed so as to face the outside.
- each of the plurality of gas distribution plates includes a disk-shaped member, and the plurality of gas diffusion chambers include a disk-shaped space formed at the center of the disk-shaped member, and the disk-shaped space. And the plurality of groove-like spaces formed concentrically with each other.
- the additional gas is individually supplied from the additional gas supply source to each of the plurality of gas diffusion chambers.
- a substrate processing apparatus comprising: a processing chamber that accommodates a substrate in a processing space; and a gas supply device that is disposed so as to face the substrate and supplies gas from a gas supply source to the processing space.
- the gas supply device includes a counter plate facing the processing space and having a plurality of through holes, a plurality of gas distribution plates, and a cover plate.
- the counter plate, the plurality of gas distribution plates And a cover plate are stacked in this order, and a plurality of gas diffusion chambers are formed on the surface of the gas distribution plate closest to the counter plate on the side of the counter plate, and each of the gas distribution plates includes the gas distribution plate.
- At least one gas supply path for supplying the gas from a supply source to any of the gas diffusion chambers is formed, and in each of the gas distribution plates, the gas supply path branches into a plurality of branch paths, and the gas supply path From the source to the tip of each branch. The distance the substrate processing apparatus is provided, which is a same.
- each of the gas distribution plates is provided with at least one gas supply path for supplying gas from the gas supply source to any of the gas diffusion chambers.
- the number of passages can be easily increased, so that the number of gas diffusion chambers can be increased and the processing space can be divided into more regions.
- the gas supply path branches into a plurality of branch paths, and the distance from the gas supply source to the tip of each branch path is the same. As a result, plasma can be distributed more uniformly in the processing space.
- FIG. 2 is a perspective view schematically showing a configuration of a shower head in FIG. 1. It is a top view which shows the mode of arrangement
- FIG. 1 is a cross-sectional view schematically showing a configuration of a substrate processing apparatus including a gas supply device according to the present embodiment.
- a substrate processing apparatus 10 includes a chamber 11 (processing chamber) that accommodates a wafer W, a substantially columnar mounting table 12 that is disposed substantially at the center of the chamber 11 and places the wafer W thereon, A shower head 13 (gas supply device) disposed on the ceiling of the chamber 11 so as to face the mounting table 12 and an exhaust device 14 for exhausting the inside of the chamber 11 are provided.
- a chamber 11 processing chamber
- a substantially columnar mounting table 12 that is disposed substantially at the center of the chamber 11 and places the wafer W thereon
- a shower head 13 gas supply device disposed on the ceiling of the chamber 11 so as to face the mounting table 12 and an exhaust device 14 for exhausting the inside of the chamber 11 are provided.
- the mounting table 12 includes a cylindrical base portion 15 made of a conductor, for example, aluminum, an electrostatic chuck 16 disposed on the upper surface of the base portion 15, and a shield 17 made of an insulator covering the periphery of the base portion 15.
- the electrostatic chuck 16 has a built-in electrostatic electrode plate 19 connected to a DC power source 18. Further, the mounting table 12 is arranged so as to surround the wafer W electrostatically attracted to the electrostatic chuck 16, and the focus ring 20 made of a semiconductor, for example, silicon, and the quartz surrounding the focus ring 20. And a shield ring 21 made of
- a high-frequency power source 24 is connected to the base 15 of the mounting table 12 via a power feed rod 22 and a lower matching unit 23, and the high-frequency power source 24 supplies high-frequency power to the base 15, and there are many around the mounting table 12.
- a ring plate-like exhaust plate 25 having a through hole is disposed.
- the shower head 13 introduces the processing gas and the additional gas from the external processing gas source and the additional gas source into the processing space S between the mounting table 12 and the shower head 13. Details of the configuration of the shower head 13 will be described later.
- the electric field generated in the processing space S by the high frequency power supplied to the base 15 excites the processing gas introduced into the processing space S to generate plasma, and the plasma generates a predetermined plasma on the wafer W. Processing, for example, dry etching processing is performed.
- the exhaust device 14 depressurizes the inside of the chamber 11, and the exhaust plate 25 prevents the plasma in the processing space S from flowing into the exhaust device 14.
- the shower head 13 has a counter plate 27 facing the processing space S and having a large number of through gas holes 26, four gas distribution plates 28 to 31, a cooling plate 32, and a cover plate 33.
- the counter plate 27, the gas distribution plates 28 to 31, the cooling plate 32, and the lid plate 33 are all made of a disk-like member having the same outer diameter, and are stacked in this order on the shower head 13 as shown in FIG.
- a central gas diffusion chamber 34, a peripheral gas diffusion chamber 35, and an outermost gas diffusion chamber 36 are formed on the surface (the lower surface in FIG. 1) on the counter plate 27 side of the gas distribution plate 28 closest to the counter plate 27.
- the central gas diffusion chamber 34 is formed of a disk-shaped space formed at the center of the gas distribution plate 28, and the peripheral gas diffusion chamber 35 and the outermost gas diffusion chamber 36 are separated from the central gas diffusion chamber 34. It consists of two annular groove-like spaces formed concentrically.
- a wall 37 is formed between the central gas diffusion chamber 34 and the peripheral gas diffusion chamber 35, and a wall 38 is formed between the peripheral gas diffusion chamber 35 and the outermost gas diffusion chamber 36.
- the peripheral gas diffusion chamber 35 is formed so as to face the wafer W placed on the mounting table 12, and the peripheral gas diffusion chamber 35 and the outermost gas diffusion chamber 36 are formed on the wafer W. It is formed so as to face the focus ring 20 and the shield ring 21 without facing each other.
- a refrigerant passage 32 a is provided inside the cooling plate 32, and the temperature of the cooling plate 32, and thus the entire shower head 13, is adjusted by the refrigerant flowing through the refrigerant passage 32 a.
- the shower head 13 is connected to a processing gas introduction system 39 that is connected to a processing gas source and introduces a processing gas, and an additional gas introduction system 40 that is connected to the additional gas source and introduces an additional gas.
- the pipe 41 connected to the processing gas source is branched into two pipes 43 and 44 by a flow divider 42, and the pipe 44 is further branched into two pipes 44a and 44b.
- the pipes 43, 44a, and 44b are connected to the cover plate 33 through connection portions 45a to 45c, respectively, and supply the processing gas to the central gas diffusion chamber 34, the peripheral gas diffusion chamber 35, and the outermost gas diffusion chamber 36.
- the pipe 46 connected to the additional gas source is branched into three pipes 46a to 46c.
- the pipes 46a to 46c are connected to the lid plate 33 through connection portions 47a to 47c, respectively, and supply additional gas to the central gas diffusion chamber 34, the peripheral gas diffusion chamber 35, and the outermost gas diffusion chamber 36.
- a valve 48 is disposed in the pipe 44 b, and the central gas diffusion chamber 34, the peripheral gas diffusion chamber 35, and the outermost gas diffusion chamber 36 are adjusted by distributing the processing gas by the flow divider 42 and opening / closing the valve 48. The flow rate of the supplied process gas is individually adjusted.
- the processing gas supplied to the central gas diffusion chamber 34, the peripheral gas diffusion chamber 35, and the outermost gas diffusion chamber 36 is introduced into the processing space S through the through gas holes 26 of the counter plate 27, as described above.
- the portion (hereinafter referred to as the central gas diffusion chamber 34) in the processing space S “Center portion”), a portion facing the peripheral gas diffusion chamber 35 (hereinafter referred to as “peripheral portion”), and a portion facing the outermost gas diffusion chamber 36 (hereinafter referred to as “outermost portion”).
- the flow rate of the processing gas introduced into () is also individually controlled. That is, the processing space S is divided into three parts (a central part, a peripheral part, and an outermost part), and the flow rate of the processing gas introduced into the central part, the peripheral part, and the outermost part is individually controlled.
- a valve 49a is disposed on the pipe 46a, and a valve 49c is disposed on the pipe 46c.
- the central gas diffusion chamber 34, the peripheral gas diffusion chamber 35, and the outermost gas diffusion chamber are opened and closed by opening and closing the valves 49a and 49c.
- the flow rate of the additional gas supplied to 36 is individually adjusted.
- the additional gas supplied to the central gas diffusion chamber 34, the peripheral gas diffusion chamber 35, and the outermost gas diffusion chamber 36 is introduced into the processing space S through the through gas holes 26 of the counter plate 27.
- the central portion, the peripheral portion, and the outermost portion in the processing space S are adjusted.
- the flow rate of the additional gas introduced is also individually controlled. That is, regarding the additional gas, the flow rate of the additional gas introduced into the central portion, the peripheral portion, and the outermost portion in the processing space S is individually controlled.
- connection portion 45 a and the connection portion 47 a are disposed at substantially the center of the cover plate 33, and penetrate the shower head 13 in the thickness direction from each of the connection portion 45 a and the connection portion 47 a toward the central gas diffusion chamber 34.
- Vertical gas supply paths 50 and 51 are formed. As shown in FIG. 4, each of the vertical gas supply paths 50 and 51 is opened at the approximate center of the central gas diffusion chamber 34, and is thus supplied to the central gas diffusion chamber 34 via the vertical gas supply paths 50 and 51.
- the processing gas and the additional gas are uniformly diffused and distributed in the central gas diffusion chamber 34.
- the processing gas and the additional gas are evenly introduced from the through gas holes 26 corresponding to the central gas diffusion chamber 34 into the central portion of the processing space S, so that the processing gas and the additional gas are evenly distributed in the central portion. Furthermore, the plasma can be uniformly distributed.
- Each of the gas distribution plates 28 to 31 of the shower head 13 is formed with a gas supply path for distributing and supplying the processing gas or the additional gas to the peripheral gas diffusion chamber 35 and the outermost gas diffusion chamber 36.
- the gas distribution plate 31 is supplied with the processing gas introduced through the connection portion 45 b on the surface on the lid plate 33 side (upper surface in FIG. 10).
- a gas supply path 52 that is distributed and supplied to the diffusion chamber 35 is formed.
- the gas distribution plate 30 distributes the additional gas introduced through the connection portion 47 b to the peripheral gas diffusion chamber 35 on the surface on the lid plate 33 side (upper surface in FIG. 11).
- a gas supply path 53 to be supplied is formed.
- the gas distribution plate 29 is supplied with the processing gas introduced through the connecting portion 45 c on the surface on the lid plate 33 side (upper surface in FIG. 12) to the outermost gas diffusion chamber 36.
- a gas supply path 54 for distributing and supplying is formed. Further, as shown in FIG. 9 and FIG. 13, the gas distribution plate 28 receives the additional gas introduced through the connection portion 47 c on the surface on the lid plate 33 side (upper surface in FIG. 13). A gas supply path 55 that is distributed and supplied to 36 is formed. That is, one gas supply path is formed in one gas distribution plate. 5 and 7 to 13, a part of the shape is omitted for the sake of simplicity, and the cross sections of the gas supply paths 52 to 55 are U-shaped as shown in FIG. The depth is set to 5 to 10 mm.
- the shower head 13 penetrates the lid plate 33 and the cooling plate 32 from the connection portion 45 b in the thickness direction, and the end of the gas supply path 52.
- a vertical gas supply path 56 that communicates with the communication location 52a, which is a portion, is formed.
- four vertical gas supply paths 57a to 57d are formed through the gas distribution path 28 through 31 in the thickness direction from the gas supply path 52 and open to the peripheral gas diffusion chamber 35 (shown by broken lines in FIG. 5). .
- the four vertical gas supply paths 57a to 57d are arranged symmetrically with respect to the center of the peripheral gas diffusion chamber 35 and are equally arranged in the circumferential direction.
- the gas supply path 52 branches from the communication point 52a toward the vertical gas supply paths 57a to 57d on the upper surface of the gas distribution plate 31 into the branch paths 52b to 52e, and the vertical gas supplies are provided at the ends of the branch paths 52b to 52e.
- the paths 57a to 57d are opened.
- the distance from the communication location 52a to the tips of the branch paths 52b to 52e is set to be the same, so the connection section 45b to the opening in the peripheral gas diffusion chamber 35 of each of the vertical gas supply paths 57a to 57d. Are the same distance.
- each vertical gas supply path 57a is connected from the connecting portion 45b.
- Conductance to the opening in the peripheral gas diffusion chamber 35 of ⁇ 57d is also the same.
- the flow rate, pressure, and timing of the processing gas supplied from the openings of the vertical gas supply passages 57a to 57d in the peripheral gas diffusion chamber 35 are the same, whereby the processing gas is evenly distributed in the peripheral gas diffusion chamber 35. Distributed.
- the gas supply path 52 branches in an H shape in plan view, but the branching form of the gas supply path 52 is not limited to this, and the distance from the communication point 52 a to the tips of the branch paths 52 b to 52 e is as follows. If it is the same, it may be formed in any form.
- the shower head 13 penetrates the lid plate 33, the cooling plate 32, and the gas distribution plate 31 from the connection portion 47 b in the thickness direction, and at the end of the gas supply path 53.
- a vertical gas supply path 58 communicating with a certain communication point 53a is formed.
- four vertical gas supply paths 59a to 59d are formed which penetrate the gas distribution plates 28 to 30 in the thickness direction from the gas supply path 53 and open to the peripheral gas diffusion chamber 35 (shown by broken lines in FIG. 7). .
- the four vertical gas supply paths 59a to 59d are arranged symmetrically with respect to the center of the peripheral gas diffusion chamber 35 and are equally arranged in the circumferential direction.
- the gas supply path 53 is branched into the respective branch paths 53b to 53e from the communication portion 53a toward the respective vertical gas supply paths 59a to 59d on the upper surface of the gas distribution plate 30, and each vertical gas supply is provided at the tip of each of the branch paths 53b to 53e.
- the paths 59a to 59d are opened.
- the distance from the communication point 53a to the tip of each branch path 53b to 53e is set to be the same, from the connecting portion 47b to the opening in the peripheral gas diffusion chamber 35 of each vertical gas supply path 59a to 59d. Are the same distance.
- each vertical gas supply path 59a is connected to the connecting portion 47b.
- Conductance to the opening in the peripheral gas diffusion chamber 35 of ⁇ 59d is also the same.
- the flow rate, pressure, and timing of the additional gas supplied from the openings of the vertical gas supply passages 59a to 59d in the peripheral gas diffusion chamber 35 are the same, whereby the additional gas is evenly distributed in the peripheral gas diffusion chamber 35. Distributed.
- the gas supply path 53 branches in an H shape in plan view, but the branch form of the gas supply path 53 is not limited to this, and the distance from the communication point 53 a to the tips of the branch paths 53 b to 53 e is as follows. If it is the same, it may be formed in any form.
- the shower head 13 penetrates the lid plate 33, the cooling plate 32, and the gas distribution plates 31, 30 from the connection portion 45 c in the thickness direction, and A vertical gas supply path 60 that communicates with the communication portion 54a that is the end is formed. Further, four vertical gas supply paths 61a to 61d are formed which penetrate from the gas supply path 54 to the gas distribution plates 28 and 29 in the thickness direction and open to the outermost gas diffusion chamber 36 (shown by broken lines in FIG. 8). The The four vertical gas supply paths 61a to 61d are arranged symmetrically with respect to the center of the outermost gas diffusion chamber 36 and are equally arranged in the circumferential direction.
- the gas supply path 54 branches from the communication portion 54a to the respective vertical gas supply paths 61a to 61d on the upper surface of the gas distribution plate 29 into the respective branch paths 54b to 54e, and each vertical gas supply at the tip of each of the branch paths 54b to 54e.
- the paths 61a to 61d are opened.
- each vertical gas supply path 61a is connected to the connecting portion 45c.
- Conductance to the opening in the outermost gas diffusion chamber 36 of ⁇ 61d is also the same.
- the flow rate, pressure, and timing of the processing gas supplied from the openings of the vertical gas supply paths 61a to 61d in the outermost gas diffusion chamber 36 are the same, whereby the processing gas flows in the outermost gas diffusion chamber 36. Evenly distributed.
- the gas supply path 54 branches in an H shape in plan view, but the branching form of the gas supply path 54 is not limited to this, and the distance from the communication point 54 a to the tips of the branch paths 54 b to 54 e is as follows. If it is the same, it may be formed in any form.
- the shower head 13 penetrates the lid plate 33, the cooling plate 32, and the gas distribution plates 31 to 29 from the connection portion 47 c in the thickness direction, and the gas supply path.
- a vertical gas supply path 62 that communicates with a communication location 55 a that is an end of 55 is formed.
- four vertical gas supply paths 63a to 63d are formed which pass through the gas distribution plate 28 in the thickness direction from the gas supply path 55 and open to the outermost gas diffusion chamber 36 (shown by broken lines in FIG. 9).
- the four vertical gas supply paths 63a to 63d are arranged symmetrically with respect to the center of the outermost gas diffusion chamber 36 and are equally arranged in the circumferential direction.
- the gas supply path 55 branches from the communication portion 55a to the respective vertical gas supply paths 63a to 63d on the upper surface of the gas distribution plate 28 into the respective branch paths 55b to 55e, and each vertical gas supply at the tip of each of the branch paths 55b to 55e.
- the paths 63a to 63d are opened.
- the vertical gas supply paths 63a to 63d are set to have the same cross-sectional area, and the branch paths 55b to 55e are also set to have the same cross-sectional area. Conductance to the opening in the outermost gas diffusion chamber 36 of ⁇ 63d is also the same.
- the flow rate, pressure, and timing of the additional gas supplied from the openings of the vertical gas supply paths 63a to 63d in the outermost gas diffusion chamber 36 are the same. Evenly distributed.
- the gas supply path 55 branches in an H shape in plan view, but the branching form of the gas supply path 55 is not limited to this, and the distance from the communication point 55a to the tip of each branch path 55b to 55e is If it is the same, it may be formed in any form.
- each of the gas distribution plates 28 to 31 includes a processing gas supply source and an additional gas supply source to a peripheral gas diffusion chamber 35 and an outermost gas diffusion chamber.
- One gas supply path 52 (53, 54 or 55) for supplying the processing gas or additional gas to any one of 36 is formed, that is, one gas supply path is formed in one gas distribution plate.
- the gas supply channel 52 Each of .about.55 can supply the processing gas and the additional gas to the peripheral gas diffusion chamber 35 and the outermost gas diffusion chamber 36 independently of other gas supply paths.
- the processing space S can be divided into more regions.
- the conductance from the connecting portion 45b to the opening in the peripheral gas diffusion chamber 35 of each vertical gas supply path 57a to 57d is the same, and in the peripheral gas diffusion chamber 35 of each vertical gas supply path 59a to 59d from the connecting portion 47b.
- the conductance to the opening is also the same.
- the conductance from the connecting portion 45c to the opening in the outermost gas diffusion chamber 36 of each vertical gas supply path 61a to 61d is also the same, and the outermost gas diffusion chamber of each vertical gas supply path 63a to 63d from the connecting portion 47c.
- the conductance up to the opening at 36 is also the same.
- the processing gas and the additional gas are evenly distributed in the peripheral gas diffusion chamber 35 and the outermost gas diffusion chamber 36.
- the processing gas and the additional gas are uniformly introduced into the peripheral portion and the outermost portion in the processing space S, and the plasma can be distributed more uniformly in the processing space S.
- the plurality of gas diffusion chambers of the shower head 13 described above are concentric with the central gas diffusion chamber 34 of the disk-shaped space formed at the center of the gas distribution plate 28 that is a disk-shaped member, and the central gas diffusion chamber 34. It consists of a peripheral gas diffusion chamber 35 and an outermost gas diffusion chamber 36 which are two formed annular groove spaces. Therefore, the processing gas and the additional gas are introduced symmetrically into the processing space S through the central gas diffusion chamber 34, the peripheral gas diffusion chamber 35 and the outermost gas diffusion chamber 36, and the plasma generated from the processing gas and the additional gas is processed. It can be distributed more reliably and uniformly in the space.
- the peripheral gas diffusion chamber 35 and the outermost gas diffusion chamber 36 are formed so as to face the focus ring 20 and the shield ring 21 positioned outside the outer edge of the wafer W.
- the distribution of the processing gas and additional gas introduced in the vicinity of the outer edge of the wafer W is controlled by controlling the flow rate of the processing gas and additional gas introduced from the outermost gas diffusion chamber 36 as well as the peripheral gas diffusion chamber 35.
- the plasma distribution in the vicinity of the outer edge of the wafer W can be controlled in more detail.
- additional gas is individually supplied to the central gas diffusion chamber 34, the peripheral gas diffusion chamber 35, and the outermost gas diffusion chamber 36.
- the control can be performed for each of the peripheral portion and the outermost portion, so that the plasma distribution in the processing space S can be controlled in more detail.
- the number of vertical gas supply paths corresponding to the gas distribution plates 28 to 31 is four.
- the opening of each vertical gas supply path in the peripheral gas diffusion chamber 35 or the outermost gas diffusion chamber 36 is used.
- the number of the vertical gas supply paths is not limited to this as long as the portions are arranged symmetrically with respect to the center of the peripheral gas diffusion chamber 35 or the outermost gas diffusion chamber 36 and are evenly arranged in the circumferential direction.
- the gas distribution plates 28 to 31 may not be stacked in this order, as long as the vertical gas supply paths 56, 57a to 57d, 58, 59a to 59d, 60, 61a to 61d, 62, 63a to 63d do not interfere with each other.
- the stacking order of the gas distribution plates 28 to 31 can be changed.
- the central gas diffusion chamber 34, the peripheral gas diffusion chamber 35, and the outermost gas diffusion chamber 36 each comprise one space.
- FIGS. A large number of annular groove spaces 64 are formed concentrically on the lower surface of the plate 28, and each annular groove space 64 is assigned to each of the central gas diffusion chamber 34, the peripheral gas diffusion chamber 35, and the outermost gas diffusion chamber 36.
- the inner six annular groove spaces 64 constitute the central gas diffusion chamber 34
- the three outer annular groove spaces 64 outside the central gas diffusion chamber 34 are the peripheral gas diffusion chambers.
- one annular groove-like space 64 on the outermost periphery constitutes the outermost gas diffusion chamber 36.
- the gas supply path 55 is omitted.
- the shower head 71 includes a counter plate 27, two gas distribution plates 65 and 66 made of a disk-like member, a cooling plate 32, and a lid plate 33 stacked in order from the bottom.
- a central gas diffusion chamber 34, a peripheral gas diffusion chamber 35, and an outermost gas diffusion chamber 36 are formed.
- the gas distribution plate 66 distributes the processing gas introduced via the connecting portion 45 b on the surface on the lid plate 33 side (upper surface in FIG. 18) to the peripheral gas diffusion chamber 35.
- the gas supply path 67 to be supplied is formed, and the gas supply path 68 for distributing and supplying the processing gas introduced through the connection portion 45c to the outermost gas diffusion chamber 36 is formed. Further, as shown in FIG. 17 and FIG. 19, the gas distribution plate 65 is supplied with the additional gas introduced through the connection portion 47 b on the surface on the lid plate 33 side (upper surface in FIG. 19). A gas supply path 69 is formed which is distributed and supplied. Further, the gas distribution plate 65 is formed with a gas supply path 70 that distributes and supplies the additional gas introduced through the connection portion 47 c to the outermost gas diffusion chamber 36. 16 to 19, some shapes are omitted for the sake of simplicity.
- the shower head 71 has a vertical gas supply path 72 that communicates from the connection portion 45 b to the communication location 67 a that is the end of the gas supply path 67. It is formed.
- two vertical gas supply paths 73a and 73b are formed which pass through the gas distribution plates 65 and 66 in the thickness direction from the gas supply path 67 and open to the peripheral gas diffusion chamber 35 (shown by broken lines in FIG. 16). .
- the two vertical gas supply paths 73a and 73b are arranged symmetrically with respect to the center of the peripheral gas diffusion chamber 35 and are equally arranged in the circumferential direction (see FIG. 21).
- the gas supply path 67 branches from the communication portion 67a to the respective vertical gas supply paths 73a and 73b on the upper surface of the gas distribution plate 66 into the respective branch paths 67b and 67c, and each vertical gas supply at the tip of each of the branch paths 67b and 67c.
- the paths 73a and 73b are opened.
- the distances from the communication point 67a to the tips of the branch paths 67b and 67c are set to be the same, the cross-sectional areas of the vertical gas supply paths 73a and 73b are set to be the same, and the branch paths 67b and 67c are disconnected. Since the areas are also set to be the same, the conductance from the connecting portion 45b to the opening in the peripheral gas diffusion chamber 35 of each vertical gas supply path 73a, 73b is the same.
- the shower head 71 is formed with a vertical gas supply path 74 that communicates from the connection portion 45 c to the communication location 68 a that is the end of the gas supply path 68.
- two vertical gas supply passages 75a and 75b are formed which extend from the gas supply passage 68 through the gas distribution plates 65 and 66 in the thickness direction and open to the outermost gas diffusion chamber 36 (shown by broken lines in FIG. 16).
- the two vertical gas supply paths 75a and 75b are arranged symmetrically with respect to the center of the outermost gas diffusion chamber 36 and are equally arranged in the circumferential direction (see FIG. 21).
- the gas supply path 68 is branched into the branch paths 68b and 68c from the communication point 68a toward the vertical gas supply paths 75a and 75b on the upper surface of the gas distribution plate 66, and the vertical gas supplies at the tips of the branch paths 68b and 68c.
- the paths 75a and 75b are opened.
- the distances from the communication point 68a to the tips of the branch paths 68b and 68c are set to be the same, the cross-sectional areas of the vertical gas supply paths 75a and 75b are set to be the same, and the branch paths 68b and 68c are disconnected. Since the areas are also set to be the same, the conductance from the connecting portion 45c to the opening in the outermost gas diffusion chamber 36 of each vertical gas supply path 75a, 75b is the same.
- the gas supply path 67 is branched in a V shape in plan view, and the gas supply path 68 is also branched in a V shape in plan view, but the branching form of the gas supply paths 67 and 68 is not limited to this.
- the distance from the communication point 67a to the tip of each branch path 67b, 67c is the same, and the distance from the communication point 68a to the tip of each branch path 68b, 68c is the same, it is formed in any form. Also good.
- the shower head 71 is formed with a vertical gas supply path 76 that communicates from the connection portion 47b to the communication portion 69a that is the end of the gas supply path 69.
- Two vertical gas supply passages 77a and 77b are formed which pass through the gas distribution plate 65 from the gas supply passage 69 in the thickness direction and open to the peripheral gas diffusion chamber 35 (shown by broken lines in FIG. 17).
- the two vertical gas supply paths 77a and 77b are arranged symmetrically with respect to the center of the peripheral gas diffusion chamber 35 and are equally arranged in the circumferential direction (see FIG. 21).
- the gas supply path 69 branches from the communication point 69a to the vertical gas supply paths 77a and 77b on the upper surface of the gas distribution plate 65 into the branch paths 69b and 69c, and the vertical gas supplies at the tips of the branch paths 69b and 69c.
- the paths 77a and 77b are opened.
- the distances from the communication point 69a to the tips of the branch paths 69b and 69c are set to be the same.
- the cross-sectional areas of the vertical gas supply paths 77a and 77b are set to be the same, and the cross-sectional areas of the branch paths 69b and 69c are also set to be the same.
- the conductance from the connecting portion 47b to the opening in the peripheral gas diffusion chamber 35 of each vertical gas supply path 77a, 77b is the same.
- the shower head 71 is formed with a vertical gas supply path 78 that communicates from the connection portion 47c to the communication portion 70a that is the end of the gas supply path 70.
- two vertical gas supply passages 79a and 79b are formed which penetrate from the gas supply passage 70 through the gas distribution plate 65 in the thickness direction and open to the outermost gas diffusion chamber 36 (shown by broken lines in FIG. 17).
- the two vertical gas supply paths 79a and 79b are arranged symmetrically with respect to the center of the outermost gas diffusion chamber 36 and are equally arranged in the circumferential direction (see FIG. 21).
- the gas supply path 70 is branched into the branch paths 70b and 70c from the communication point 70a toward the vertical gas supply paths 79a and 79b on the upper surface of the gas distribution plate 65, and the vertical gas supplies at the tips of the branch paths 70b and 70c.
- the paths 79a and 79b are opened.
- the distances from the communication point 70a to the tips of the branch paths 70b and 70c are set to be the same, and the cross-sectional areas of the vertical gas supply paths 79a and 79b are set to be the same.
- the cross-sectional areas of the branch paths 70b and 70c are also set to be the same. Therefore, the conductance from the connecting portion 47c to the opening in the outermost gas diffusion chamber 36 of each vertical gas supply path 79a, 79b is the same.
- the gas supply path 69 is branched in a V shape in plan view, and the gas supply path 70 is also branched in a V shape in plan view, but the branch form of the gas supply paths 69 and 70 is not limited to this.
- the distance from the communication point 69a to the tip of each branch path 69b, 69c is the same, and the distance from the communication point 70a to the tip of each branch path 70b, 70c is the same, it is formed in any form. Also good.
- the shower head 71 two gas supply paths are formed in one gas distribution plate.
- the gas distribution plates 65 and 66 and the cooling plate 32 are provided.
- the cover plate 33 is stacked and the arrangement positions of the gas supply paths 67 to 70 overlap in plan view, it is not necessary to consider interference between the gas supply paths 67 to 70. Therefore, by increasing the number of gas distribution plates, the number of gas supply paths can be easily increased, and the number of gas diffusion chambers can be increased to divide the processing space S into a larger number of regions.
- the processing gas and the additional gas are evenly distributed.
- the processing gas and the additional gas are evenly distributed.
- Gas and additional gas may be evenly distributed.
- the shower head 80 includes a counter plate 27, two gas distribution plates 81 and 82 made of a disk-like member, a cooling plate 32, and a lid, which are stacked in order from the bottom. It consists of a plate 33. Similar to the gas distribution plate 28, a central gas diffusion chamber 34, a peripheral gas diffusion chamber 35, and an outermost gas diffusion chamber 36 are formed in the gas distribution plate 81. Further, similarly to the gas distribution plate 81, the central gas diffusion chamber 34, the peripheral gas diffusion chamber 35, and the outermost gas diffusion chamber 36 are formed in the gas distribution plate 82.
- the central gas diffusion chamber 34 of the gas distribution plate 81 (hereinafter referred to as “lower central gas diffusion chamber 34”) and the central gas diffusion chamber 34 of the gas distribution plate 82 (hereinafter referred to as “upper central gas diffusion chamber 34”).
- lower central gas diffusion chamber 34 and the central gas diffusion chamber 34 of the gas distribution plate 82 (hereinafter referred to as “upper central gas diffusion chamber 34”).
- upper central gas diffusion chamber 34 Are communicated by a plurality of vertical gas supply holes 83 that are arranged symmetrically with respect to the center of each central gas diffusion chamber 34 and are equally arranged in the circumferential direction.
- the peripheral gas diffusion chamber 35 of the gas distribution plate 81 (hereinafter referred to as “lower peripheral gas diffusion chamber 35”) and the peripheral gas diffusion chamber 35 of the gas distribution plate 82 (hereinafter referred to as “upper peripheral gas diffusion chamber 35”).
- each peripheral gas diffusion chamber 35 is communicated by a plurality of vertical gas supply holes 84 that are arranged symmetrically with respect to the center of each peripheral gas diffusion chamber 35 and that are equally arranged in the circumferential direction.
- the outermost gas diffusion chamber 36 of the gas distribution plate 81 hereinafter referred to as “lower outermost gas diffusion chamber 36”
- the outermost gas diffusion chamber 36 of the gas distribution plate 82 hereinafter referred to as “uppermost outer gas”.
- the diffusion chambers 36 ”) are arranged symmetrically with respect to the center of each outermost gas diffusion chamber 36, and communicate with each other by a plurality of vertical gas supply holes 85 that are equally arranged in the circumferential direction.
- the vertical gas supply is distributed uniformly in the circumferential direction.
- the hole 83 is supplied to the lower central gas diffusion chamber 34.
- the processing gas and additional gas supplied to the lower central gas diffusion chamber 34 are evenly distributed in the lower central gas diffusion chamber 34 by further free diffusion.
- the vertical gas supply holes 84 that are uniformly distributed in the circumferential direction lower the gas. It is supplied to the peripheral gas diffusion chamber 35.
- the processing gas and additional gas supplied to the lower peripheral gas diffusion chamber 35 are evenly distributed in the lower peripheral gas diffusion chamber 35 by further free diffusion.
- the vertical gas supply holes 85 are evenly distributed in the circumferential direction. It is supplied to the lowermost outermost gas diffusion chamber 36.
- the processing gas and additional gas supplied to the lower outermost gas diffusion chamber 36 are evenly distributed in the lower outermost gas diffusion chamber 36 by further free diffusion. That is, in the shower head 80, since the processing gas and the additional gas perform free diffusion twice, each gas diffusion chamber (the lower central gas diffusion chamber 34, the lower peripheral gas diffusion chamber 35, and the lower outermost gas diffusion chamber 36). ), The processing gas and the additional gas can be evenly distributed.
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Abstract
Description
W ウエハ
10 基板処理装置
11 チャンバ
13,71,80 シャワーヘッド
28~31,65,66,81,82 ガス分配板
34 中央ガス拡散室
35 周縁ガス拡散室
36 最外ガス拡散室
39 処理ガス導入系
40 付加ガス導入系
52~55,67~70 ガス供給路
Claims (6)
- ガス供給源から処理空間へガスを供給するガス供給装置であって、
前記処理空間に対向し且つ多数の貫通穴を有する対向板と、複数のガス分配板と、蓋板とを備え、
前記対向板、前記複数のガス分配板、及び蓋板がこの順で積層され、
最も前記対向板寄りの前記ガス分配板における前記対向板側の面には複数のガス拡散室が形成され、
前記ガス分配板の各々には、前記ガス供給源から前記ガス拡散室のいずれかへ前記ガスを供給するガス供給路が少なくとも1つ形成され、
前記ガス分配板の各々において、前記ガス供給路は複数の分岐路に分岐し、前記ガス供給源から各前記分岐路の先端までの距離は同一であることを特徴とするガス供給装置。 - 各前記分岐路のコンダクタンスは同一であることを特徴とする請求項1記載のガス供給装置。
- 前記ガス供給装置は前記処理空間を介して円板状の基板に対向し、
前記複数のガス拡散室は複数の溝状空間を含み、
前記複数の溝状空間は前記基板の外縁よりも外側に対向するように形成されることを特徴とする請求項1記載のガス供給装置。 - 前記複数のガス分配板の各々は円板状部材からなり、前記複数のガス拡散室は、前記円板状部材の中心に形成された円板状空間と、該円板状空間と同心に形成された前記複数の溝状空間とからなることを特徴とする請求項1記載のガス供給装置。
- 付加ガス供給源から前記複数のガス拡散室の各々へ個別に付加ガスが供給されることを特徴とする請求項1記載のガス供給装置。
- 処理空間へ基板を収容する処理室と、前記基板と対向するように配置され、且つガス供給源から前記処理空間へガスを供給するガス供給装置とを備える基板処理装置であって、
前記ガス供給装置は、前記処理空間に対向し且つ多数の貫通穴を有する対向板と、複数のガス分配板と、蓋板とを有し、
前記対向板、前記複数のガス分配板、及び蓋板がこの順で積層され、
最も前記対向板寄りの前記ガス分配板における前記対向板側の面には複数のガス拡散室が形成され、
前記ガス分配板の各々には、前記ガス供給源から前記ガス拡散室のいずれかへ前記ガスを供給するガス供給路が少なくとも1つ形成され、
前記ガス分配板の各々において、前記ガス供給路は複数の分岐路に分岐し、前記ガス供給源から各前記分岐路の先端までの距離は同一であることを特徴とする基板処理装置。
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US14/391,482 US9887108B2 (en) | 2012-05-11 | 2013-05-09 | Gas supply device and substrate processing apparatus |
CN201380019330.9A CN104205309B (zh) | 2012-05-11 | 2013-05-09 | 气体供给装置和基板处理装置 |
KR1020147028375A KR102070702B1 (ko) | 2012-05-11 | 2013-05-09 | 가스 공급 장치 및 기판 처리 장치 |
US15/852,194 US10199241B2 (en) | 2012-05-11 | 2017-12-22 | Gas supply device and substrate processing apparatus |
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- 2013-05-09 WO PCT/JP2013/063616 patent/WO2013168825A1/ja active Application Filing
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JPH11158662A (ja) * | 1997-12-01 | 1999-06-15 | Hitachi Ltd | プラズマ処理方法およびプラズマ処理装置 |
JP2002252208A (ja) * | 2001-02-22 | 2002-09-06 | Ibiden Co Ltd | プラズマエッチング装置のガス噴出し板 |
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Also Published As
Publication number | Publication date |
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CN104205309B (zh) | 2016-10-19 |
US20150107772A1 (en) | 2015-04-23 |
US10199241B2 (en) | 2019-02-05 |
CN104205309A (zh) | 2014-12-10 |
JP2013239482A (ja) | 2013-11-28 |
TW201408812A (zh) | 2014-03-01 |
JP6157061B2 (ja) | 2017-07-05 |
KR102070702B1 (ko) | 2020-01-29 |
US9887108B2 (en) | 2018-02-06 |
KR20150018773A (ko) | 2015-02-24 |
US20180190519A1 (en) | 2018-07-05 |
TWI611039B (zh) | 2018-01-11 |
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