WO2013136656A1 - 成膜装置 - Google Patents
成膜装置 Download PDFInfo
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- WO2013136656A1 WO2013136656A1 PCT/JP2013/000526 JP2013000526W WO2013136656A1 WO 2013136656 A1 WO2013136656 A1 WO 2013136656A1 JP 2013000526 W JP2013000526 W JP 2013000526W WO 2013136656 A1 WO2013136656 A1 WO 2013136656A1
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- Prior art keywords
- electrode
- plasma generation
- generation space
- substrate
- film
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- 239000010408 film Substances 0.000 claims abstract description 127
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
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- 238000000034 method Methods 0.000 abstract description 14
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
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- 239000010703 silicon Substances 0.000 description 5
- HMUNWXXNJPVALC-UHFFFAOYSA-N 1-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C(CN1CC2=C(CC1)NN=N2)=O HMUNWXXNJPVALC-UHFFFAOYSA-N 0.000 description 4
- 229910021417 amorphous silicon Inorganic materials 0.000 description 4
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- YLZOPXRUQYQQID-UHFFFAOYSA-N 3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]propan-1-one Chemical compound N1N=NC=2CN(CCC=21)CCC(=O)N1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F YLZOPXRUQYQQID-UHFFFAOYSA-N 0.000 description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 3
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- LDXJRKWFNNFDSA-UHFFFAOYSA-N 2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]ethanone Chemical compound C1CN(CC2=NNN=C21)CC(=O)N3CCN(CC3)C4=CN=C(N=C4)NCC5=CC(=CC=C5)OC(F)(F)F LDXJRKWFNNFDSA-UHFFFAOYSA-N 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
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- OHVLMTFVQDZYHP-UHFFFAOYSA-N 1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-2-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]ethanone Chemical compound N1N=NC=2CN(CCC=21)C(CN1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)=O OHVLMTFVQDZYHP-UHFFFAOYSA-N 0.000 description 1
- WZFUQSJFWNHZHM-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)CC(=O)N1CC2=C(CC1)NN=N2 WZFUQSJFWNHZHM-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- 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
- C23C16/50—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 using electric discharges
- C23C16/505—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 using electric discharges using radio frequency discharges
- C23C16/509—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 using electric discharges using radio frequency discharges using internal electrodes
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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
- C23C16/50—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 using electric discharges
- C23C16/513—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 using electric discharges using plasma jets
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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
- C23C16/22—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 deposition of inorganic material, other than metallic material
- C23C16/24—Deposition of silicon only
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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
- C23C16/4412—Details relating to the exhausts, e.g. pumps, filters, scrubbers, particle traps
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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
- C23C16/45574—Nozzles for more than one gas
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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
- C23C16/50—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 using electric discharges
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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
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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
- H01J37/32532—Electrodes
- H01J37/32568—Relative arrangement or disposition of electrodes; moving means
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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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02612—Formation types
- H01L21/02617—Deposition types
- H01L21/0262—Reduction or decomposition of gaseous compounds, e.g. CVD
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1804—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof comprising only elements of Group IV of the Periodic Table
- H01L31/182—Special manufacturing methods for polycrystalline Si, e.g. Si ribbon, poly Si ingots, thin films of polycrystalline Si
- H01L31/1824—Special manufacturing methods for microcrystalline Si, uc-Si
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/46—Generating plasma using applied electromagnetic fields, e.g. high frequency or microwave energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/545—Microcrystalline silicon PV cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a technique for forming a thin film such as silicon on a large area substrate used for a solar cell or the like or a semiconductor wafer used for manufacturing a semiconductor device.
- Thin-film silicon solar cells have been actively studied in recent years because they consume less silicon than bulk type crystalline silicon solar cells, are relatively easy to increase in area, and are low in manufacturing costs.
- a tandem thin-film silicon solar cell (hereinafter simply referred to as a solar cell) has an amorphous silicon film laminated on the top surface of a microcrystalline silicon film, and each layer absorbs light in different wavelength regions, thereby converting light energy conversion efficiency. It is a thing that raised.
- a-Si film amorphous silicon film
- ⁇ c-Si film a microcrystalline silicon film
- CVD Chemical Vapor Deposition
- silicon is deposited on the substrate by reacting with.
- the a-Si film and the ⁇ c-Si film can be separately formed by adjusting the partial pressure ratio between the SH 4 gas and the H 2 gas.
- Patent Document 1 A film forming apparatus using a plasma CVD method is developed (Patent Document 1).
- the present invention has been made under such a background, and an object thereof is to provide a film forming apparatus capable of forming a thin film having a good film quality and a uniform film thickness.
- a film forming apparatus is a film forming apparatus for forming a thin film on a substrate by reacting a plurality of types of reaction gases in a processing container.
- a mounting table provided in the processing container for mounting a substrate; In order to form a strong plasma generation space between the substrates placed on this mounting table, they are arranged in the horizontal direction at intervals between each other in the vertical orientation, and the lower end portion and the above-mentioned
- a plurality of plate-like electrode portions forming a weak plasma generation space for generating plasma having a light emission intensity lower than that of the plasma formed in the strong plasma generation space in a gap between the substrate,
- a first reactive gas supply unit for supplying a first reactive gas to the strong plasma generation space;
- a second reaction gas for supplying a second reaction gas for forming a thin film on the substrate by reacting with the active species of the first reaction gas in the lower part of the strong plasma generation space or the weak plasma generation space.
- a reaction gas supply unit An exhaust part for exhausting the reaction gas from the weak plasma generation space;
- a first high-frequency power supply unit that applies high-frequency powers having different phases to one and the other of the electrode units adjacent to each other across the strong plasma generation space, and a second high-frequency power supply unit,
- the distance between adjacent electrode parts across the strong plasma generation space is in the range of 2 mm or more and 20 mm or less,
- the distance between the substrate on the mounting table and the electrode portion is in the range of 5 mm or more and 100 mm or less.
- the film forming apparatus may have the following features.
- the lower surface of the plate-like electrode portion is formed with an inclined surface portion that is inclined from the both side wall surfaces of the electrode portion toward the central portion side.
- the mounting table includes a moving mechanism that reciprocates the substrate mounted on the mounting table along a direction in which the plurality of electrode portions are arranged.
- the planar shape of the electrode part is formed such that the distance between adjacent electrode parts across the strong plasma generation space is wide in a region where the film formation rate is high and narrow in a region where the film formation rate is low. That.
- a plurality of notch parts formed by notching the side wall surfaces of the electrode parts adjacent to each other with the strong plasma generation space interposed therebetween are arranged at intervals.
- the plate-like electrode portion is divided so that a strong plasma space is also formed in a crossing direction intersecting with the strong plasma forming space formed between the plate-like electrode portions, and the first high frequency wave is divided.
- the power supply unit and the second high-frequency power supply unit apply high-frequency powers having different phases to adjacent electrode units across the strong plasma space extending in the intersecting direction.
- the electrode portion may be a wide plate-like covering the upper side of the plate surface of the substrate, instead of arranging the plurality of plate-like electrode portions in the vertical orientation and spaced apart from each other in the lateral direction.
- a plurality of openings are provided at intervals, and a gap is formed between the inner surface of the opening and the second electrode portion inside the opening.
- the strong plasma generation space is formed by arranging.
- the exhaust part includes an exhaust path formed in the electrode part, and an exhaust hole provided in a lower surface of the electrode for exhausting the reaction gas in the weak plasma generation space to the exhaust path.
- the first reaction gas is hydrogen gas
- the second reaction gas is silicon compound gas.
- the pressure in the processing container is 100 Pa or more and 2000 Pa or less.
- the present invention applies high-frequency power having different phases to one and the other of the plate-like electrode portions arranged at intervals from each other, and generates plasma in a strong plasma generation space sandwiched between these electrode portions, Plasma having a light emission intensity lower than that of the plasma formed in the strong plasma generation space is also formed in the gap between the substrate on which the film is formed and each electrode portion.
- the strong plasma generation space the active species of the first reaction gas is generated, while in the weak plasma generation space, the reaction between the active species generated in the strong plasma generation space and the second reaction gas proceeds.
- a thin film with few defects can be uniformly formed on the substrate surface.
- capacitively coupled plasma is formed between adjacent electrode portions, and H 2 (first reaction gas) is activated to react with SH 4 (second reaction gas).
- H 2 first reaction gas
- SH 4 second reaction gas
- a film forming apparatus 1 includes a mounting table 2 on which a substrate S to be formed is mounted inside a processing container 10 that is a vacuum container, and an H on the surface of the substrate S on the mounting table 2.
- a strong plasma generation space 101 is formed in order to supply two active species and an electrode portion 41 for forming a weak plasma generation space 102 in which a reaction between the active species and SiH 4 proceeds is arranged. It has become.
- the processing container 10 is configured as a flat and metal container that can be sealed, and has a size that can store a large glass substrate S of, for example, 1100 mm ⁇ 1400 mm or more.
- 11 is a loading / unloading port through which the short side of the substrate S provided in the processing vessel 10 can pass
- 12 is a gate valve for opening and closing the loading / unloading port 11.
- an exhaust pipe 13 for evacuating the inside of the processing container 10 is provided on the side wall surface of the processing container 10.
- the space in 10 can be adjusted to 100 Pa to 2000 Pa, for example.
- the short side direction of the substrate S installed in the processing container 10 will be described as the vertical direction
- the long side direction of the substrate S will be described as the horizontal direction.
- a mounting table 2 made of a dielectric or the like is disposed on the floor surface in the processing container 10.
- the substrate S described above is mounted on the mounting table 2 to form a ⁇ c-Si film.
- the transfer of the substrate S between an external substrate transfer mechanism (not shown) that carries the substrate S in and out and the mounting table 2 is performed by using a lift pin 22 configured to be lifted and lowered by a lift mechanism 25 via a lift plate 24. Done with.
- reference numeral 23 denotes a bellows provided so as to surround the elevating pins 22 in order to keep the inside of the processing vessel 10 in a vacuum atmosphere.
- a temperature adjusting unit 21 made of, for example, a resistance heating element is embedded in the mounting table 2, and the temperature adjusting unit 21 generates heat by electric power supplied from a power supply unit (not shown) and passes through the upper surface of the mounting table 2.
- the substrate S can be adjusted to a temperature of 200 ° C. to 300 ° C., for example.
- the temperature adjusting unit 21 is not limited to the one that heats the substrate S, and may employ, for example, a Peltier element that cools the substrate S and adjusts it to a predetermined temperature according to the process conditions.
- the active species SiH 3 necessary for the growth of the ⁇ c-Si film is supplied at a high concentration to a region near the surface of the substrate S, while Si, SiH, SiH 2, etc.
- the following functions can be obtained. It has become.
- a space to which H 2 (first reaction gas) is supplied is configured as a strong plasma generation space 101 to obtain H radicals that are active species.
- the space on the upper surface of the substrate S in which the H radical reacts with SiH 4 (second reactive gas) is configured as a weak plasma generation space 102 that generates plasma having a light emission intensity lower than that of the strong plasma generation space 101.
- SiH 3 is supplied to the surface of the substrate S at a high concentration while suppressing generation of unnecessary active species.
- the film forming apparatus 1 is spaced apart from each other in the lateral direction so as to divide the space in the processing container 10 above the substrate S placed on the mounting table 2.
- a plate-like electrode portion 41 arranged with a gap is arranged.
- Each electrode part 41 is comprised as an elongate plate-shaped metal member, for example, and is arrange
- the length of the electrode portion 41 in the longitudinal direction is longer than the short side of the substrate S.
- the electrode portions 41 are arranged at equal intervals in the direction of the long side (lateral direction) of the substrate S, and thereby, between the two electrode portions 41 adjacent to each other, the short side direction ( An elongated space (strong plasma generation space 101) extending in the vertical direction is formed.
- Each electrode part 41 is fixed to the ceiling part of the processing container 10 via the insulating member 31, and the high-frequency power is supplied from the first and second power supply parts 61 and 62 to the strong plasma generation space 101.
- plasma is generated, the detailed configuration of the power supply system will be described later.
- the distance w between the electrode portions 41 arranged adjacent to each other with the strong plasma generation space 101 interposed therebetween is, for example, in the range of 2 mm or more and 20 mm or less, more preferably 4 mm or more and 10 mm or less. It has been adjusted.
- the distance between the electrode portions 41 is less than 2 mm, plasma is not generated in the strong plasma generation space 101, while when this distance is greater than 20 mm, the plasma generated in the processing vessel 10 is weakened to generate H radicals. The amount decreases, causing a decrease in film formation rate.
- the distance h between the lower surface of the electrode part 41 and the surface of the substrate S is adjusted to 5 mm or more and 100 mm or less, more preferably 7 mm or more and 30 mm or less.
- the distance between the electrode part 41 and the substrate S is greater than 100 mm, the plasma generated in the weak plasma generation space 102 becomes weak and the film formation rate decreases.
- the distance between the electrode portion 41 and the substrate S is smaller than 5 mm, the intensity of the plasma generated in the weak plasma generation space 102 approaches the intensity of the plasma generated in the strong plasma generation space 101, and SiH Decomposition of 4 proceeds excessively and becomes a factor of deteriorating the quality of the ⁇ c-Si film.
- FIGS. 1 and 3 a mechanism for supplying a reactive gas to the strong plasma generating space 101 and the weak plasma generating space 102 and exhausting the reacted gas will be described.
- a space is formed between the upper surface side of the insulating member 31 that fixes the electrode portion 41 and the processing container 10, and strong plasma is generated in this space.
- An H 2 supply path 32 for supplying H 2 to the space 101 is provided.
- the H 2 supply path 32 is disposed on the upper side of each strong plasma generation space 101 and is connected to the H 2 supply path 32 along the direction in which the electrode portion 41 extends as shown in FIGS. 3, 4, and 6. H 2 can be supplied into the strong plasma generation space 101 through the branched path 323 and the H 2 supply hole 321 formed in the insulating member 31.
- the plurality of H 2 supply paths 32 are connected to a common H 2 supply line 511, and an H 2 supply unit 51 configured by an H 2 cylinder and a flow rate adjusting valve or the like.
- the hydrogen can be received from the gas and a predetermined amount of H 2 can be supplied to each strong plasma generation space 101.
- the H 2 supply path 32, the H 2 supply line 511, the H 2 supply unit 51, and the like correspond to the first reaction gas supply unit of this example.
- each electrode portion 41 has a SiH 4 supply path 42 for supplying SiH 4 to the weak plasma generation space 102 and a reaction supplied to the weak plasma generation space 102.
- An exhaust passage 43 for discharging gas is formed.
- the SiH 4 supply path 42 in this example is provided in a region on the lower side of the electrode portion 41 and in a region close to both side walls of the electrode portion 41 (two in total). And is formed along the direction in which the electrode portion 41 extends.
- a plurality of branch paths 423 extend downward from each SiH 4 supply path 42 at intervals, and are formed on the lower surface of the electrode portion 41 as shown in FIGS. 3, 4, and 6.
- SiH 4 can be supplied toward the weak plasma generation space 102 from the SiH 4 supply holes 421 arranged in two rows along both side walls on the front and rear sides of the electrode portion 41.
- the SiH 4 supply hole 421 is not limited to the case where the SiH 4 supply hole 421 is provided on the bottom surface of the electrode part 41.
- the branch path 423 extends from the SiH 4 supply path 42 in the horizontal direction to the side wall surface on the lower side of the electrode part 41.
- a SiH 4 supply hole 421 may be formed to supply SiH 4 to the lower side of the strong plasma generation space 101.
- the SiH 4 supply path 42 formed in each electrode portion 41 is connected to a common SiH 4 supply line 521, and is composed of a SiH 4 cylinder and a flow rate adjusting valve. It is possible to receive SiH 4 from the SiH 4 supply unit 52 and supply a predetermined amount of SiH 4 .
- the SiH 4 supply path 42, the SiH 4 supply line 521, the SiH 4 supply unit 52, and the like correspond to the second reaction gas supply unit in this example.
- the exhaust passage 43 of the two on the inner side of the upper region than SiH 4 supply channel 42 described above is, along a direction parallel to extension of the electrode portions 41 and the SiH 4 supply channel 42 Is formed.
- a plurality of branch passages 433 extend downward from the two exhaust passages 43 at intervals from each other, and the two branch passages 433 join in the middle and are formed on the lower surface of the electrode portion 41.
- the exhaust hole 431 is connected. As shown in FIG. 4, the exhaust holes 431 are arranged in one row at the center of the lower surface of the electrode portion 41 so as to be sandwiched between the rows of SiH 4 supply holes 421 arranged in two rows.
- the exhaust passage 43 formed in each electrode portion 41 is connected to an external exhaust means 53 constituted by a vacuum pump or the like via a common exhaust line 531.
- the reactive gas in the weak plasma generation space 102 can be discharged to the outside.
- the exhaust path 43, the exhaust line 531, the exhaust means 53, and the like correspond to the exhaust part of this example.
- the electrode part 41 on one side (indicated as the electrode part 41a in FIG. 5) across the strong plasma generation space 101 is, for example, 13.56 MHz, 2500 W / piece (1
- the first power supply unit 61 first high frequency power supply unit for applying the high frequency power of the electrode portion
- the other electrode part 41 (denoted as electrode part 41b in FIG. 5) across the strong plasma generation space 101 has a phase of 180 ° with respect to the high-frequency power supplied from the first power supply part 61.
- second power supply unit 62 (second high-frequency power supply unit) that applies the high-frequency power of, for example, 13.56 MHz and 2500 W / line which is delayed (phase is inverted).
- reference numerals 612 and 622 denote matching units for matching high-frequency power supplied from the power supply units 61 and 62, respectively.
- the first and second power supply units 61 and 62 are configured as externally synchronized power sources capable of outputting high frequency power synchronized with a frequency signal input from the outside.
- the first and second power supply units 61 and 62 are connected to the common frequency signal generator 63, the first signal line 611 that connects the first power supply unit 61 and the frequency signal generator 63 is used.
- the second signal line 621 connecting the second power source 62 and the frequency signal generator 63 is longer than the second power line 62.
- the frequency signal output from the frequency signal generator 63 is input to the second power supply unit 62 with a delay from the timing input to the first power supply unit 61, and the phase of the high frequency power is utilized using this delay. Is adjusted. It has been experimentally confirmed that the phase of the high-frequency power output from each of the power supply units 61 and 62 can be adjusted by this method, as shown in the embodiments described later. However, the method of adjusting the phase difference between the first power supply unit 61 and the second power supply unit 62 is not limited to a specific method, and other methods may be adopted.
- a forced balun circuit is connected to the output of one high frequency power supply unit, one output of the forced balun circuit is applied to the electrode unit 41a, and another output whose phase is inverted from the one output is applied to the electrode unit 41b. It is good also as composition to do.
- the substrate S placed on the placement table 2 is: It is in an electrically floating state. For this reason, plasma weaker than the plasma formed in the strong plasma generation space 101 is generated in the space (weak plasma generation space 102) between the electrode portions 41 and the substrate S.
- the relative intensity ratio of the plasma formed in the strong plasma generation space 101 and the weak plasma generation space 102 is determined as follows. Can be grasped by the ratio of the emission intensity when the image is taken. When the ratio of the emission intensity of the weak plasma generation space 102 to the emission intensity of the strong plasma generation space 101 is less than 1, a weaker plasma than the plasma generated in the strong plasma generation space 101 is generated in the weak plasma generation space 102. It can be said that.
- the film forming apparatus 1 having the above-described configuration is connected to the control unit 7 as shown in FIGS.
- the control unit 7 includes, for example, a computer including a CPU and a storage unit (not shown).
- the operation of the film forming apparatus 1, that is, the substrate S is loaded into the processing container 10 and placed on the mounting table 2.
- a program in which a group of steps (commands) for control and the like related to operations from when a ⁇ c-Si film having a predetermined film thickness is formed on the substrate S is carried out is recorded.
- This program is stored in a storage medium such as a hard disk, a compact disk, a magnetic optical disk, or a memory card, and installed in the computer therefrom.
- the film forming apparatus 1 opens the gate valve 12 of the loading / unloading port 11 and causes the lift pins 22 to protrude from the mounting table 2 to remove the substrate S from the substrate transport mechanism. receive.
- the substrate transport mechanism is retracted out of the processing container 10 to close the gate valve 12 and the lifting pins 22 are lowered to place the substrate S on the mounting table 2. Further, in parallel with this operation, the processing chamber 10 is evacuated, the processing chamber 10 is adjusted to, for example, 900 Pa in the range of 100 Pa to 2000 Pa, and the temperature adjustment unit 21 controls the temperature so that the substrate S becomes 250 ° C., for example. Make adjustments.
- the H 2 supply unit 51 passes through the H 2 supply line 511 and the H 2 supply path 32 to generate H 2 of a total amount of, for example, 40,000 sccm for a strong plasma generation space.
- H 2 is converted into plasma by supplying high-frequency power to each electrode unit 41 from the first and second power supply units 61 and 62 while supplying the plasma to the electrode 101.
- a total amount of 400 sccm of SiH 4 is supplied from the SiH 4 supply unit 52 to the weak plasma generation space 102 via the SiH 4 supply line 521 and the SiH 4 supply path 42.
- H 2 supplied from H 2 supply passage 32 flows toward the lower side is the strong plasma generating space 101 is formed.
- H 2 collides with electrons supplied from the electrode portion 41, it is turned into plasma and active species are formed.
- H 2 is a molecule consisting of only two hydrogen atoms, only hydrogen radicals are generated as active species from the hydrogen plasma as shown in the following formula (1).
- SiH 4 flowing out from SiH 4 supply hole 421 is supplied to the weak plasma generating space 102 between the electrode portion 41 and the substrate S, it is mixed with the H radicals flowing from the upstream side of the surface of the substrate S spread.
- a mixed gas of the H radical and SiH 4 is supplied to the surface of the substrate S, and a reaction represented by the following formula (2) proceeds in the mixed gas.
- SiH 4 + H ⁇ SiH 3 + H 2 ... (2) In this way, high-concentration SiH 3 is supplied to the surface of the substrate S, and a high-quality ⁇ c-Si film is formed on the surface of the substrate S from this SiH 3 .
- Si as compared with a conventional capacitively coupled film forming apparatus using parallel plates is used. It is possible to advance the progress of the reaction of (2) above while maintaining the condition that unnecessary active species such as SiH and SiH 2 are not easily generated, and to reduce ion damage to the substrate S.
- SiH 3 generated by the above formula (2) further reacts with H radicals as time passes, and SiH 2 , SiH, and Si are sequentially generated. Therefore, these active species and their polymers Higher order silane and fine particles are taken into the ⁇ c-Si film and the film quality is deteriorated.
- the film forming apparatus 1 is provided with exhaust holes 431 for exhausting the reaction gas in the weak plasma generation space 102 on the lower surface of each electrode part 41.
- the inside of the processing chamber 10 is constantly evacuated through the exhaust hole 431 toward the exhaust passage 43, and the mixed gas spreading in the weak plasma generation space 102 reaches the surface of the substrate S and then moves upward in the flow direction. Then, the gas is quickly exhausted from the processing container 10 through the exhaust hole 431.
- the exhaust hole 431 is provided on the lower surface of the electrode portion 41 in this way, the residence time of the mixed gas on the surface of the substrate S is shortened, and the reaction between the H radical and SiH 4 is advanced in the weak plasma generation space 102.
- the space to which H 2 is supplied is configured as a strong plasma generation space 101 to obtain a large amount of H radicals as active species, while the space to which SiH 4 is supplied is a weak plasma generation space.
- SiH 3 can be supplied to the surface of the substrate S at a high concentration while suppressing ion damage to the substrate S.
- the film forming apparatus 1 has the following effects. For example, high-frequency power having a phase difference of 180 ° is applied to one and the other of the plate-like electrode portions 41 that are spaced apart from each other, and plasma is generated in the strong plasma generation space 101 sandwiched between these electrode portions 41. On the other hand, a weaker plasma than the plasma formed in the strong plasma generation space 101 is also formed in the weak plasma generation space 102 where film formation is performed. In the strong plasma generation space 101, H radicals are generated, while in the weak plasma generation space 102, the reaction between the H radicals and SiH 4 proceeds to uniformly form a ⁇ c-Si film with few defects on the surface of the substrate S. Can be formed.
- the distance w between the adjacent electrode portions 41 is adjusted to a range of 2 to 20 mm, and the distance h between the lower surface of the electrode portion 41 and the substrate S is adjusted to a range of 5 to 100 mm.
- methods for forming a more uniform ⁇ c-Si film on the substrate S are listed below.
- an inclined surface portion 46 is provided on the lower surface of each electrode portion 41 c so as to rise from the both side wall surfaces of the electrode portion 41 c toward the central portion, and the distance from the substrate S to the lower end of the inclined surface portion 46. than h 2 is an example configured as towards the distance h 1 from the substrate S to both side wall surfaces of the electrode portion 41c is increased. Both side wall surfaces of the electrode portion 41c correspond to the exit (opening portion) of the strong plasma generation space 101, and it has been confirmed in the simulation described later that uniform plasma is formed in the vicinity of this region.
- h 2 is adjusted within a range of 5 to 100 mm.
- the mounting table 2 a is supported on the floor surface in the processing container 10 via the caster part 26, and the mounting table 2 a is aligned along the arrangement direction of the electrode parts 41 by the drive mechanism 27. May be reciprocated. Even when the electron density in the vicinity of the exit of the strong plasma generation space 101 is high, the substrate S is moved back and forth in the lateral direction to move the region of the substrate S facing the region having the high electron density, thereby The film thickness formed on S can be made uniform.
- FIG. 10 shows the plasma intensity in the strong plasma generation space 101 in the region by separating the distance w between the electrode portions 41 in the region where the deposition rate of the ⁇ c-Si film formed on the substrate S is increased.
- the example of the electrode part 41d which improves the in-plane uniformity of a film thickness by reducing is shown.
- the region on the center side of the substrate S where the SiH 4 supply holes 421 and the exhaust holes 431 are dense is close to the inner wall surface of the processing vessel 10 and has fewer SiH 4 supply holes 421 and exhaust holes 431 than the center side. Compared with the side region of S, the supply amount of H radicals and SiH 4 is large, and the film formation rate tends to be high.
- the planar shape of the electrode part 41d is not limited to the example shown in FIG.
- a preliminary experiment is performed using the electrode unit 41 shown in FIG. 4 to identify a region where the deposition rate is high, and the distance w between the electrode units 41d located in this region is relatively large.
- the planar shape of the electrode part 41d can be adjusted as appropriate.
- interval of the adjacent electrode part 41 is not limited to when changing the distance between electrode parts 41d uniformly, as shown in FIG.
- a notch part 45 is provided at an interval on the side wall surface of the electrode part 41e having a distance w, and the distance between the electrode parts 41e and 41 in the notch part 45 is w ′. You may make it become.
- the notch portion 45 is formed so that the average value of the distances between the electrode portions 41e and 41 in the region in which the notch portion 45 is provided and the region in which the notch portion 45 is not provided is w 1 described above. It is recommended to adjust the notch depth and the arrangement interval.
- FIGS. 12 to 15 components having the same functions as those of the first embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals as those shown in these drawings.
- the ⁇ c-Si film formed on the wafer in the manufacturing process of the semiconductor device is required to have a higher level of in-plane uniformity compared to the case where the film is formed on the substrate for the solar cell. Therefore, in the film forming apparatus of this example, as shown in FIG. 12, the shape of the bottom surface of the electrode part 41f is, for example, a square, and these electrode parts 41f are not only in the X-axis direction but also in the Y-axis direction in the figure.
- the difference from the film forming apparatus 1 according to the first embodiment is that the long and thin plate-like electrode portions 41 are spaced apart only in the X-axis direction. In other words, the electrode part 41f of FIG.
- the electrode portion 41 is configured by dividing it in the Y-axis direction.
- the distance between the electrode parts 41f arranged adjacent to each other across the strong plasma generation space 101 is, for example, 2 mm or more and 20 mm or less, more preferably 4 mm or more and 10 mm or less.
- the first embodiment is that the distance h between the lower surface of the electrode part 41 and the surface of the substrate S is adjusted to 5 mm or more and 100 mm or less, more preferably 7 mm or more and 30 mm or less. It is the same as the form.
- SiH 4 supply holes 421 are provided on the bottom surface of each electrode portion 41 f at, for example, four corners of a square, and the center surrounded by these SiH 4 supply holes 421.
- An exhaust hole 431 is provided in the part.
- strong plasma generating space 101 between the electrode portions 41f adjacent is formed, in order to supply of H 2 to the strong plasma generation space 101, H 2 in the insulating member 31 constituting the ceiling portion of the processing chamber 10
- the supply hole 321 is provided in the same manner as the film forming apparatus 1 of the first embodiment.
- SiH 4 gas or H 2 gas is supplied through branch paths 423 and 323 penetrating the electrode portion 41f. Further, the mixed gas flowing into the exhaust hole 431 is discharged to the outside through the branch path 433 and the exhaust path 43.
- FIG. 14 only one set of each of the supply / exhaust passages 42, 32, 43 and the branch passages 423, 323, 433 is shown in order to avoid complication of the drawing.
- each electrode portion 41 f is connected to the first and second power supply portions 61 and 62 so that high-frequency power whose phase is inverted is applied to the adjacent electrode portion 41 f.
- the electrode portion 41f to which the electric power with reversed phase is applied is surrounded by a strong plasma generation space 101 extending so as to intersect in a lattice pattern, like a checkered pattern. It will be in the state where it lined up.
- the electrode portion 41 f connected to the first power supply portion 61 is denoted by “41 a”
- the electrode portion 41 f connected to the second power supply portion 62 is denoted by “41 b”.
- subjected is the same as that of the case of FIG.
- the shape of the bottom surface of the electrode portion 41f is, for example, a square, and these electrode portions 41f are arranged in the front-rear and left-right directions, and by applying power whose phase is reversed to the adjacent electrode portions 41f, only the left-right direction (X axis direction in FIG. In addition, the plasma is dispersed in the front-rear direction (Y-axis direction in FIG. 12). Therefore, even if there is a slight difference in the film formation speed in the respective regions below the electrode portion 41f and the strong plasma generation space 101, the regions having different film formation rates are arranged in a distributed manner. Become.
- the length of one side of the bottom surface of the electrode portions 41g to 41j formed in a square shape is The example which comprised so that it might become long gradually toward the peripheral part side from the part side is shown.
- This example corresponds to the example of the electrode part 41d shown in FIG. 10, and for example, the distance between the adjacent electrode parts g to 41j so as to offset the difference in the arrangement density of the SiH 4 supply holes 421 and the exhaust holes 431.
- the shape of the bottom surface of the electrode portion is not limited to a rectangular shape such as a square, and an electrode portion 41k having a circular bottom surface may be used as shown in FIG. May be.
- the strong plasma forming spaces 101 that intersect with each other and extend in a lattice shape are not limited to being orthogonal, and the strong plasma forming spaces 101 may be crossed obliquely.
- the shape of the bottom surface of the electrode portion is, for example, a rhombus.
- FIG. 18 shows an example in which one of the electrode portions 41m (41n) (first electrode portion) is integrated among the electrode portions 41m and 41n to which high-frequency powers whose phases are reversed are applied.
- the first electrode portion 41m is made of a wide metal plate that covers the upper side of the plate surface of the wafer, and the second electrode portion 41n (second electrode portion) is disposed at a position where the second electrode portion 41n (second electrode portion) is disposed.
- An opening 103 that is slightly larger than the planar shape of the electrode portion 41n is formed. Then, by inserting the second electrode portion 41n into the opening 103, there is a gap between the inner surface of the opening 103 and the outer surface of the second electrode portion 41n disposed inside thereof.
- the gap is formed and the strong plasma generation space 101 is formed.
- the opening 103 in this example is similar to the electrode part 41f shown in FIG. 12 described above, and is provided with electrode parts 41m and 41n to which high-frequency power with reversed phase is applied (shown separately in white and gray). Are arranged in a checkered pattern.
- the shapes of the integrated first electrode portion 41m and the second electrode portion 41n inserted into the opening 103 are not limited to the example shown in FIG.
- FIG. 19 shows an example in which hexagonal openings 103 are regularly arranged in the first electrode part 41 East formed in a hexagonal shape, and the second electrode part 41p is inserted into the opening part 103.
- a hexagonal region (indicated by a broken line in FIG. 19) of the first electrode part 41 East sandwiched between the openings 103 and the second electrode part 41p are arranged in a honeycomb shape.
- the electrode portions 41 East and 41p are highly symmetrical as viewed from the wafer.
- the shape of the second electrode portion may be another shape such as a circle.
- the area of the second electrode portion and the strong plasma space 101 are Of course, the width of the gap formed may be changed between the central portion side and the peripheral portion side of the wafer.
- a rotation axis that rotates around the vertical axis is provided at the center on the lower surface side of the mounting table 2 that supports the wafer, and film formation is performed while the wafer on the mounting table 2 is rotated. In-plane uniformity may be further improved.
- the disc-shaped wafer is formed in the same size as shown in FIG. 12, for example, because the circumferential length is different between the position on the center side and the position on the outer periphery side.
- the outer peripheral portion of the wafer is exposed to the plasma concentration portion (for example, the lower region of the strong plasma forming space 101) more frequently than the inner peripheral portion, and the film formation rate is not uniform when viewed in the radial direction. There is also a concern that this will expand.
- the plasma concentration portion for example, the lower region of the strong plasma forming space 101
- An electrode portion 41l divided by 101 may be provided. Since the number of electrode portions 41l arranged above the electrode portion 41l divided in this way is the same at the position on the center side of the wafer and the position on the outer peripheral portion side, the wafer is rotated one revolution. Further, the number of electrode portions 41l passing therethrough and the number of strong plasma forming spaces 101 extending in the radial direction are uniform, and the film formation rate can be made uniform when viewed in the radial direction.
- the phase difference of the high frequency power applied from the first and second power supply units 61 and 62 is smaller than 180 °, for example, 30 °.
- the plasma intensity may be made smaller than that in the case where the phase is inverted (the phase is shifted by 180 °) by adjusting to a range of from above to less than 180 °.
- the high frequency power applied to the electrode part 41 is not restricted to the example of 13.56 MHz, Of course, other frequencies, for example, 100 MHz or other high frequency power may be applied.
- the film forming apparatus 1 shown in FIG. 1 the example in which the reaction gas in the weak plasma generation space 102 is exhausted to the outside through the exhaust hole 431 opened on the lower surface of the electrode portion 41 is shown. Is not limited to the case of forming in the electrode part 41. For example, when a good film quality can be obtained even if exhaust is performed from the exhaust pipe 13 shown in FIG. 1, the case where the exhaust pipe 13 is used as an exhaust part is not denied.
- the present invention is not limited to the case where the present invention is applied to the formation of a Si film using H 2 and SiH 4 .
- the present invention can be applied to the case where the first reactive gas is H 2 and the second reactive gas is a silicon compound gas other than SiH 4 , for example, SiH 2 Cl 2 to form microcrystalline Si.
- the inside of the container 10 was photographed with a CCD camera with a transmission wavelength filter, and the emission intensity of plasma was measured.
- FIG. 21 (a) A photograph of the measurement result of the light emission intensity related to (Example 1) is shown in FIG. 21 (a), and the measurement result related to (Comparative Example 1) is shown in FIG. 21 (b).
- FIG. 22 shows an in-plane portion of the deposition rate of the ⁇ c-Si film in (Example 1) and (Comparative Example 1).
- the horizontal axis in FIG. 22 is the distance in the horizontal direction from the center of the electrode unit 41 connected to or grounded to the second power supply unit 62, and the vertical axis is the deposition rate of the ⁇ c-Si film at that position [ nm / second].
- the results of (Example 1) are plotted with diamonds
- the results of (Comparative Example 1) are plotted with squares.
- FIG. 21A related to (Example 1)
- the light emission intensity on the lower surface of the electrode portions 41 arranged side by side is comparable
- Comparative Example 1 the lower surface of the electrode unit 41 connected to the first power supply unit 61 is bright and the lower surface of the grounded electrode unit 41 is clearly visible.
- Simulation 2 The distribution of the electron density in the weak plasma generation space 102 was simulated when the inclined surface portion 46 was not provided in the electrode portion 41.
- Example 2-1 Simulation conditions (Example 2-1)
- 13.56 MHz, 400 W / piece from the first power supply portion 61 A strong plasma generation space in a state in which a high frequency power of 13.56 MHz and 600 W / line, which is 180 degrees out of phase with the high frequency power of the first power supply unit 61, is applied from the second power supply unit 62.
- the electron density distribution in the weak plasma generation space 102 was simulated by a plasma fluid model. References for plasma fluid models include M.I. J. et al. Kushner: J.A. Phys.
- Example 2-1 The simulation result of (Example 2-1) is shown in FIG. 23 (a), and the simulation result of (Example 2-2) is shown in FIG. 23 (b).
- Example 2-1 shown in FIG. 23A a region having a high electron density was confirmed on the lower side of the opening of the strong plasma generation space 101.
- Example 2-2 shown in FIG. 23B an inclined surface portion 46 is provided on the lower surface of the electrode portion 41c.
- the inclined surface portion 46 is inclined from both side wall surfaces of the electrode portion 41c toward the central portion.
- the region having a high electron density observed in (Example 2-1) is considerably eliminated, and the plasma is uniformly formed over the entire weak plasma generation space 102. This is thought to be because the concentration of the electron density at the outlet of the strong plasma generation space 101 is relaxed by strengthening the coupling with the substrate S at the tip of the inclined surface portion 46.
- Example 3 As shown in FIG. 5, the frequency signal generator 63 and the first and second power supply units 61 and 62 are connected via the first and second signal lines 611 and 621, and the second signal line 621 is connected.
- A. Experimental conditions Example 3-1 The length of the first signal line 611 from the frequency signal generator 63 to the first power supply unit 61 is 1 m, and the length of the second signal line 621 from the frequency signal generator 63 to the second power supply unit 62 is Was 8.4 m.
- Example 2 is the same as Example 3-1, except that the length of the second signal line 621 from the frequency signal generator 63 to the second power supply unit 62 is 2.85 m.
- Example 3-3 Example 2 is the same as Example 3-1 except that the length of the second signal line 621 from the frequency signal generator 63 to the second power supply unit 62 is 4.7 m.
- FIGS. 24 (a) to 24 (c) The measurement results of the waveform of the high frequency power in (Example 3-1) to (Example 3-3) are shown in FIGS. 24 (a) to 24 (c), respectively.
- the waveform of the high frequency power output from the first power supply unit 61 is indicated by a solid line
- the waveform of the high frequency power output from the second power supply unit 62 is indicated by a broken line.
- the first and second power sources are set by setting the difference in length between the first and second signal lines 611 and 621 to 7.4 m. It was possible to shift the phase difference of the high-frequency power output from the units 61 and 62 by 180 ° (invert the phase). Also in the case of (Example 3-2) shown in FIG. 24B and (Example 3-3) shown in FIG. 24C, the lengths of the first and second signal lines 611 and 621, respectively. By setting the difference in height to 1.85 m and 3.7 m, the phase difference of the high-frequency power could be changed to 45 ° and 90 °.
- Example 4 Simulation conditions (Example 4) Under the same conditions as in Example 2-1, the pressure in the processing vessel 10 was changed from 200 to 1000 Pa in increments of 200 Pa, and the change in the electric field strength with respect to the change in pressure was simulated. (Comparative Example 4-1) A simulation was performed under the same conditions as in (Example 4) except that the in-phase power (phase shift was 0 °) was applied to the adjacent electrode portions 41. (Comparative Example 4-2) The strength of the electric field with respect to the pressure change when the substrate S is placed on the lower electrode of a parallel plate having a gap width of 5 mm and high frequency power of 13.56 MHz and 500 W is applied. The change of was simulated.
- FIG. 25 shows the simulation results of Example 4 and Comparative Examples 4-1 and 4-2.
- the horizontal axis indicates the pressure (Pa) in the processing container 10
- the vertical axis indicates the electric field strength (V / m) on the substrate S.
- the results of (Example 4) are shown by rhombus plots
- the results of (Comparative Examples 4-1 and 4-2) are shown by square and triangle plots, respectively.
- the phase of the high frequency power applied to the adjacent electrode portions 41 was inverted (the phase was shifted by 180 °), and (Example 4) was compared at any pressure (comparison).
- Examples 2-1 and 2-2 the intensity of the electric field on the substrate S is smaller.
- the weak plasma generation space 102 having a lower electric field strength than the case where the phases of the high-frequency power applied to the adjacent electrode portions 41 are in phase or the conventional parallel plate, which is unnecessary. It can be said that SiH 3 can be supplied to the surface of the substrate S at a high concentration while suppressing the generation of active species.
- Example 5 Under the same conditions as in Example 2-1, the H 2 / SiH 4 values were 25 (H 2 and SiH 4 were 1000 sccm and 40 sccm, respectively), 33 (1000 sccm and 30 sccm), 50 (1000 sccm and 20 sccm), 100 (1000 sccm, 10 sccm), and the film formation rate and the crystallinity of the ⁇ c-Si film (peak intensity corresponding to the mass% of the crystallized portion (Xc)) were measured by Raman spectroscopy.
- An experiment was performed under the same conditions as in (Example 5) except that in-phase power (phase shift was 0 °) was applied to adjacent electrode portions 41.
- Example 5 Experimental results of Example 5 and Comparative Example 5 are shown in FIG.
- the horizontal axis indicates the value of H 2 / SiH 4
- the left vertical axis indicates the deposition rate (mm / sec)
- the right vertical axis indicates the crystallinity (Xc%).
- the result of (Example 5) is shown by a rhombus plot
- the result of (Comparative Example 5) is shown by a square plot.
- the black-filled plot indicates the film formation rate
- the white plot indicates the crystallinity (peak intensity% of the crystallized portion). According to the results shown in FIG.
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Abstract
Description
また、半導体装置の製造に用いられる半導体ウエハ(以下、ウエハという)についても同様に、低欠陥で面内均一性の高いSi膜の成膜が要求されている。
前記処理容器内に設けられ、基板を載置するための載置台と、
この載置台に載置された基板の上方にて、その間に強プラズマ生成空間を形成するために、各々縦向きの姿勢で互いに間隔をおいて横方向に配置されると共に、その下端部と前記基板との間の隙間に、前記強プラズマ生成空間に形成されるプラズマよりも発光強度が弱いプラズマを生成するための弱プラズマ生成空間を形成する板状の複数の電極部と、
前記強プラズマ生成空間に第1の反応ガスを供給するための第1の反応ガス供給部と、
前記強プラズマ生成空間の下部側、または前記弱プラズマ生成空間に、第1の反応ガスの活性種と反応して基板上に薄膜を成膜する第2の反応ガスを供給するための第2の反応ガス供給部と、
前記弱プラズマ生成空間から反応ガスを排気するための排気部と、
前記強プラズマ生成空間を挟んで隣り合う電極部の一方及び他方に互いに位相が異なる高周波電力を印加する第1の高周波電源部、及び第2の高周波電源部と、を備え、
前記強プラズマ生成空間を挟んで隣り合う電極部間の距離が2mm以上、20mm以下の範囲であり、
前記載置台上の基板と電極部との距離が5mm以上、100mm以下の範囲であることを特徴とする。
(a)前記板状の電極部の下面には、この電極部の両側壁面側から中央部側へ向けて傾斜する傾斜面部が形成されていること。
(b)前記載置台は、前記複数の電極部が並んでいる方向に沿って、当該載置台上に載置された基板を往復移動させる移動機構を備えていること。
(c)前記電極部の平面形状は、前記強プラズマ生成空間を挟んで隣り合う電極部間の距離が、成膜速度の速い領域で広く、成膜速度の遅い領域で狭くなるように形成されていること。
(d)前記電極部の側壁面には、前記強プラズマ生成空間を挟んで隣り合う電極部の側壁面を切り欠いて形成された複数の切り欠き部が互いに間隔をおいて配置されていること。
(e)前記板状の電極部の間に形成された強プラズマ形成空間と交差する交差方向にも強プラズマ空間が形成されるように前記板状の電極部を分割し、前記第1の高周波電源部、及び第2の高周波電源部は、この交差方向に伸びる強プラズマ空間を挟んで隣り合う電極部にも互いに位相が異なる高周波電力を印加すること。または、前記電極部は、板状の複数の電極部を各々縦向きの姿勢で互いに間隔をおいて横方向に配置することに替えて、基板の板面の上方側を覆う幅広な板状の第1の電極部の面内に、互いに間隔を開けて複数の開口部を設け、前記開口部の内側に、当該開口部の内側面との間に隙間を形成して第2の電極部を配置することにより、前記強プラズマ生成空間を形成したこと。
(g)第1の反応ガスは水素ガスであり、第2の反応ガスはシリコン化合物ガスであること。
(h)前記処理容器内の圧力が100Pa以上、2000Pa以下であること。
(2)HラジカルとSiH4との混合ガスを基板S表面から速やかに排気することにより、HラジカルとSiH4とのラジカル反応が必要以上に進行することに伴う不要な活性種の発生を抑制する。
以下、上述の作用を得るために成膜装置1に設けられている電極部41等の構成について説明する。
本例のSiH4供給路42は、図3中に破線で示すように、電極部41の下部側の領域であって、当該電極部41の両側壁面に近い領域にそれぞれ設けられ(合計2本)ており、電極部41の伸びる方向に沿って形成されている。
但し、第1の電源部61と第2の電源部62との位相差を調整する手法は特定の方法に限定されるものではなく、他の方法を採用してもよい。例えば1つの高周波電源部の出力に強制バラン回路を接続し、当該強制バラン回路の一の出力を電極部41aに印加し、当該一の出力と位相が反転した他の出力を電極部41bに印加する構成としてもよい。
H2+e-→2H+e-…(1)
SiH4+H→SiH3+H2
…(2)
こうして高濃度のSiH3が基板S表面に供給され、このSiH3から良質なμc-Si膜が基板Sの表面に成膜される。
そこで、本例の成膜装置においては、図12に示すように電極部41fの底面の形状を例えば正方形とし、これらの電極部41fが図中のX軸方向のみならず、Y軸方向にも互いに間隔をおいて配置されている点が、細長い板状の電極部41をX軸方向にのみ間隔をおいて配置した、第1の実施の形態に関わる成膜装置1と異なっている。言い替えると、図12の電極部41fは、図4に示した強プラズマ空間101が伸びる方向(Y軸方向)と交差する交差方向(X軸方向)にも強プラズマ空間101が形成されるように、当該電極部41をY軸方向にも分割することにより構成されているともいえる。
また、電極部41に印加される高周波電力は、13.56MHzの例に限られるものではなく、他の周波数、例えば100MHzやこれ以外の高周波電力を印加してもよいことは勿論である。
隣り合う電極部41間に、位相が反転した高周波電力を印加する本例の成膜装置1と、隣り合う電極部41の一方側を接地した成膜装置とで弱プラズマ生成空間102のプラズマ強度及び、μc-Si膜の成膜速度分布を比較した。
(実施例1)
図1に示した成膜装置1につき、電極部41間の距離をw=5mm、電極部41の下面と基板Sとの距離をh=20mmとし、第1の電源部61から13.56MHz、400W/本の高周波電力を印加し、第2の電源部62から第1の電源部61の高周波電力とは位相が180°ずれた13.56MHz、600W/本の高周波電力を印加して、処理容器10内を透過波長フィルタ付きCCDカメラで撮影しプラズマの発光強度を計測した。また、H2供給路32からH2を1000sccmで供給し、SiH4供給路42からSiH4を10sccmで供給して、μc-Si膜の成膜速度の面内分布を計測した。処理容器10内の圧力は900Paである。
(比較例1)
第1の電源部61から印加する電力を500W/本とし、(実施例1)にて第2の電源部62に接続されていた電極部41を接地した点以外は、(実施例1)と同様の条件で発光強度、及びμc-Si膜の成膜速度の面内分布の計測を行った。
(実施例1)に係わる発光強度の計測結果の写真を図21(a)に示し、(比較例1)に係わる計測結果を図21(b)に示す。また、(実施例1)、(比較例1)におけるμc-Si膜の成膜速度の面内分を図22に示す。図22の横軸は、第2の電源部62に接続され、または接地されている電極部41の中心からの横方向への距離、縦軸はその位置におけるμc-Si膜の成膜速度[nm/秒]を示している。図22中、(実施例1)の結果は菱形でプロットしてあり、(比較例1)の結果は四角でプロットしてある。
電極部41に傾斜面部46を設けた場合と設けない場合とにおける、弱プラズマ生成空間102内の電子密度の分布をシミュレーションした。
(実施例2-1)
図6に示した例につき、電極部41間の距離をw=10mm、電極部41の下面と基板Sとの距離をh=20mmとし、第1の電源部61から13.56MHz、400W/本の高周波電力を印加し、第2の電源部62から第1の電源部61の高周波電力とは位相が180°ずれた13.56MHz、600W/本の高周波電力を印加した状態における強プラズマ生成空間101、弱プラズマ生成空間102の電子密度分布をプラズマ流体モデルによりシミュレーションした。プラズマ流体モデルの参考文献としては、M.J.Kushner:J.Phys.D42、194013(2009)が挙げられる。なお処理容器10内の圧力は900Paとした。
(実施例2-2)
図7に示した例と同様に電極部41の下面に傾斜面部46を設け、h1=20mm、h2=10mmとした点以外は(実施例2-1)と同様の条件でシミュレーションを行った。
(実施例2-1)のシミュレーション結果を図23(a)に示し、(実施例2-2)のシミュレーション結果を図23(b)に示す。
図23(a)に示した(実施例2-1)の結果によれば、強プラズマ生成空間101の開口部の下部側に電子密度の高い領域が確認された。これに対して、図23(b)に示す(実施例2-2)では、電極部41cの下面に、電極部41cの両側壁面側から中央部側へ向けて傾斜する傾斜面部46を設けることにより、(実施例2-1)で観察された電子密度の高い領域がかなり解消され、弱プラズマ生成空間102全体に渡り均一にプラズマが形成されている。これは傾斜面部46の先端で基板Sとの結合が強化されることで、強プラズマ生成空間101の出口において電子密度の集中が緩和されたものと考えられる。
図5に示すように、周波数信号発生器63と第1、第2の電源部61、62とを第1、第2の信号線611、621を介して接続し、第2の信号線621の長さを変化させたときに第1、第2の電源部61、62から出力される高周波電力の波形をオシロスコープで測定した。
A.実験条件
(実施例3-1)
周波数信号発生器63から第1の電源部61までの第1の信号線611の長さを1mとし、周波数信号発生器63から第2の電源部62までの第2の信号線621の長さを8.4mとした。
(実施例3-2)
周波数信号発生器63から第2の電源部62までの第2の信号線621の長さを2.85mとした点以外は(実施例3-1)と同様である。
(実施例3-3)
周波数信号発生器63から第2の電源部62までの第2の信号線621の長さを4.7mとした点以外は(実施例3-1)と同様である。
(実施例3-1)~(実施例3-3)における高周波電力の波形の測定結果を各々図24(a)~図24(c)に示す。各図において第1の電源部61から出力される高周波電力の波形を実線で示し、第2の電源部62から出力される高周波電力の波形を破線で示してある。
処理容器10内の圧力を変化させたとき、基板Sの表面に形成される電界の強度をシミュレーションした。
(実施例4)
(実施例2-1)と同様の条件で処理容器10内の圧力を200~1000Paまで200Pa刻みで変化させ、圧力の変化に対する電界の強度の変化をシミュレーションした。
(比較例4-1)隣り合う電極部41に同相(位相のずれが0°)の電力を印加する条件とした他は、(実施例4)と同様の条件でシミュレーションを行った。
(比較例4-2)電極間の隙間幅が5mmの平行平板の下部電極上に基板Sを載置し、13.56MHz、500Wの高周波電力を印加した場合における、圧力の変化に対する電界の強度の変化をシミュレーションした。
(実施例4、比較例4-1、4-2)のシミュレーション結果を図25に示す。図の横軸は処理容器10内の圧力(Pa)を示し、縦軸は基板S上の電界の強度(V/m)を示す。また、(実施例4)の結果をひし形のプロットで示し、(比較例4-1、4-2)の結果を各々四角及び三角のプロットで示す。
図25に示した結果によれば、隣り合う電極部41に印加される高周波電力の位相を反転させた(位相を180°ずらした)、(実施例4)は、いずれの圧力においても(比較例2-1、2-2)に比べて基板S上の電界の強度が小さくなっている。従って、隣り合う電極部41に印加される高周波電力の位相が同相の場合や従来の平行平板に比べて、電界の強度が弱い、弱プラズマ生成空間102を形成することが可能であり、不要な活性種の発生を抑えつつSiH3を高濃度で基板S表面に供給することができるといえる。
SiH4ガスに対するH2ガスの供給比(H2/SiH4)を変化させたとき、成膜速度及び成膜されたμc-Si膜の結晶化度を測定した。
(実施例5)
(実施例2-1)と同様の条件でH2/SiH4の値を25(H2、SiH4を各々1000sccm、40sccm)、33(同1000sccm、30sccm)、50(1000sccm、20sccm)、100(1000sccm、10sccm)と変化させ、成膜速度及び、ラマン分光によりμc-Si膜の結晶化度(結晶化部分(Xc)の質量%に対応するピーク強度)を計測した。
(比較例5)隣り合う電極部41に同相(位相のずれが0°)の電力を印加した他は、(実施例5)と同様の条件で実験を行った。
(実施例5、比較例5)の実験結果を図26に示す。図の横軸はH2/SiH4の値を示し、左側の縦軸は成膜速度(mm/秒)、右側の縦軸は結晶化度(Xc%)を示す。また、(実施例5)の結果をひし形のプロットで示し、(比較例5)の結果を四角のプロットで示す。各プロットのうち、黒く塗り潰したプロットは成膜速度、白抜きのプロットは結晶化度(結晶化部分のピーク強度%)を示している。
図26に示した結果によれば、H2/SiH4の値を変化させたとき、いずれの値においても(実施例5)の方が(比較例5)よりも成膜速度が遅かった。これは、シミュレーション4の結果からわかるように、隣り合う電極部41に印加する高周波電力の位相を反転させた方が、同相の場合よりも基板Sの表面の電界強度が小さく、弱プラズマ生成空間102における活性種の発生量が少ないためではないかと考えられる。一方、(実施例5、比較例5)のいずれの場合においてもH2/SiH4の値を小さくし、SiH4ガスの相対的な供給量を増やすと成膜速度が上昇していることが分かる。
Claims (10)
- 処理容器内にて複数種類の反応ガスを反応させて基板に薄膜を成膜する成膜装置において、
前記処理容器内に設けられ、基板を載置するための載置台と、
この載置台に載置された基板の上方にて、その間に強プラズマ生成空間を形成するために、各々縦向きの姿勢で互いに間隔をおいて横方向に配置されると共に、その下端部と前記基板との間の隙間に、前記強プラズマ生成空間に形成されるプラズマよりも発光強度が弱いプラズマを生成するための弱プラズマ生成空間を形成する板状の複数の電極部と、
前記強プラズマ生成空間に第1の反応ガスを供給するための第1の反応ガス供給部と、
前記強プラズマ生成空間の下部側、または前記弱プラズマ生成空間に、第1の反応ガスの活性種と反応して基板上に薄膜を成膜する第2の反応ガスを供給するための第2の反応ガス供給部と、
前記弱プラズマ生成空間から反応ガスを排気するための排気部と、
前記強プラズマ生成空間を挟んで隣り合う電極部の一方及び他方に互いに位相が異なる高周波電力を印加する第1の高周波電源部、及び第2の高周波電源部と、を備え、
前記強プラズマ生成空間を挟んで隣り合う電極部間の距離が2mm以上、20mm以下の範囲であり、
前記載置台上の基板と電極部との距離が5mm以上、100mm以下の範囲であることを特徴とする成膜装置。 - 前記板状の電極部の下面には、この電極部の両側壁面側から中央部側へ向けて傾斜する傾斜面部が形成されていることを特徴とする請求項1に記載の成膜装置。
- 前記載置台は、前記複数の電極部が並んでいる方向に沿って、当該載置台上に載置された基板を往復移動させる移動機構を備えていることを特徴とする請求項1に記載の成膜装置。
- 前記電極部の平面形状は、前記強プラズマ生成空間を挟んで隣り合う電極部間の距離が、成膜速度の速い領域で広く、成膜速度の遅い領域で狭くなるように形成されていることを特徴とする請求項1に記載の成膜装置。
- 前記電極部の側壁面には、前記強プラズマ生成空間を挟んで隣り合う電極部の側壁面を切り欠いて形成された複数の切り欠き部が互いに間隔をおいて配置されていることを特徴とする請求項1に記載の成膜装置。
- 前記板状の電極部の間に形成された強プラズマ形成空間と交差する交差方向にも強プラズマ空間が形成されるように前記板状の電極部を分割し、前記第1の高周波電源部、及び第2の高周波電源部は、この交差方向に伸びる強プラズマ空間を挟んで隣り合う電極部にも互いに位相が異なる高周波電力を印加することを特徴とする請求項1に記載の成膜装置。
- 前記電極部は、板状の複数の電極部を各々縦向きの姿勢で互いに間隔をおいて横方向に配置することに替えて、基板の板面の上方側を覆う幅広な板状の第1の電極部の面内に、互いに間隔を開けて複数の開口部を設け、前記開口部の内側に、当該開口部の内側面との間に隙間を形成して第2の電極部を配置することにより、前記強プラズマ生成空間を形成したことを特徴とする請求項1に記載の成膜装置。
- 前記排気部は、前記電極部内に形成された排気路と、前記弱プラズマ生成空間の反応ガスをこの排気路に排気するために当該電極の下面に設けられた排気孔とを備えていることを特徴とする請求項1に記載の成膜装置。
- 第1の反応ガスは水素ガスであり、第2の反応ガスはシリコン化合物ガスであることを特徴とする請求項1に記載の成膜装置。
- 前記処理容器内の圧力が100Pa以上、2000Pa以下であることを特徴とする請求項1に記載の成膜装置。
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JPWO2016013131A1 (ja) * | 2014-07-25 | 2017-06-08 | 東芝三菱電機産業システム株式会社 | ラジカルガス発生システム |
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US20140373783A1 (en) | 2014-12-25 |
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JP2016174159A (ja) | 2016-09-29 |
KR20140135202A (ko) | 2014-11-25 |
JP6103104B2 (ja) | 2017-03-29 |
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