WO2020110406A1 - 酸化膜形成装置 - Google Patents
酸化膜形成装置 Download PDFInfo
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- WO2020110406A1 WO2020110406A1 PCT/JP2019/034881 JP2019034881W WO2020110406A1 WO 2020110406 A1 WO2020110406 A1 WO 2020110406A1 JP 2019034881 W JP2019034881 W JP 2019034881W WO 2020110406 A1 WO2020110406 A1 WO 2020110406A1
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- WIPO (PCT)
- Prior art keywords
- gas
- oxide film
- shower head
- film
- ozone
- Prior art date
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 136
- 239000000758 substrate Substances 0.000 claims abstract description 83
- 230000015572 biosynthetic process Effects 0.000 claims description 54
- 229930195735 unsaturated hydrocarbon Natural products 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 25
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- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 10
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- 239000000470 constituent Substances 0.000 claims description 5
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- 238000009792 diffusion process Methods 0.000 abstract description 26
- 239000007789 gas Substances 0.000 description 294
- 239000010408 film Substances 0.000 description 177
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 20
- 238000005229 chemical vapour deposition Methods 0.000 description 17
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 16
- 239000005977 Ethylene Substances 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 15
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- 238000009826 distribution Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 12
- 229910001873 dinitrogen Inorganic materials 0.000 description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000012159 carrier gas Substances 0.000 description 5
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- -1 polypropylene Polymers 0.000 description 5
- 230000008016 vaporization Effects 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
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- 238000010586 diagram Methods 0.000 description 4
- 229910010271 silicon carbide Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
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- 239000004698 Polyethylene Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011368 organic material Substances 0.000 description 3
- 238000005240 physical vapour deposition Methods 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 229920006324 polyoxymethylene Polymers 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 2
- 230000007717 exclusion Effects 0.000 description 2
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- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
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- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 239000010948 rhodium Substances 0.000 description 2
- 229910000077 silane Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- QQQSFSZALRVCSZ-UHFFFAOYSA-N triethoxysilane Chemical compound CCO[SiH](OCC)OCC QQQSFSZALRVCSZ-UHFFFAOYSA-N 0.000 description 2
- DHKHKXVYLBGOIT-UHFFFAOYSA-N 1,1-Diethoxyethane Chemical compound CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
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- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
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- 239000004952 Polyamide Substances 0.000 description 1
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- 239000004743 Polypropylene Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 229910018540 Si C Inorganic materials 0.000 description 1
- 229910018557 Si O Inorganic materials 0.000 description 1
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Natural products C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 1
- SEQDDYPDSLOBDC-UHFFFAOYSA-N Temazepam Chemical compound N=1C(O)C(=O)N(C)C2=CC=C(Cl)C=C2C=1C1=CC=CC=C1 SEQDDYPDSLOBDC-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000011354 acetal resin Substances 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 150000001345 alkine derivatives Chemical class 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 238000004380 ashing Methods 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- IJKVHSBPTUYDLN-UHFFFAOYSA-N dihydroxy(oxo)silane Chemical compound O[Si](O)=O IJKVHSBPTUYDLN-UHFFFAOYSA-N 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000011474 orchiectomy Methods 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920011301 perfluoro alkoxyl alkane Polymers 0.000 description 1
- 229920013653 perfluoroalkoxyethylene Polymers 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
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- 229920001155 polypropylene Polymers 0.000 description 1
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- 229910052703 rhodium Inorganic materials 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 1
- 125000003698 tetramethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- WQJQOUPTWCFRMM-UHFFFAOYSA-N tungsten disilicide Chemical compound [Si]#[W]#[Si] WQJQOUPTWCFRMM-UHFFFAOYSA-N 0.000 description 1
- NXHILIPIEUBEPD-UHFFFAOYSA-H tungsten hexafluoride Chemical compound F[W](F)(F)(F)(F)F NXHILIPIEUBEPD-UHFFFAOYSA-H 0.000 description 1
- 229910021342 tungsten silicide Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/40—Oxides
- C23C16/401—Oxides containing silicon
- C23C16/402—Silicon dioxide
-
- 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
-
- 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
-
- 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
- C23C16/45587—Mechanical means for changing the gas flow
- C23C16/45591—Fixed means, e.g. wings, baffles
-
- 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
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
Definitions
- the present invention relates to an oxide film forming apparatus for supplying a source gas containing an element forming an oxide film to a film formation base to form an oxide film on the film formation base.
- an inorganic film is formed to protect the surface and add functionality.
- many of various electric devices have been studied to be flexible, and these are required to be formed on an organic film, for example. Therefore, a low temperature film forming technique capable of forming a film on a low heat resistant substrate such as an organic film has been studied.
- CVD chemical vapor deposition
- PVD physical vapor deposition
- a source gas containing a compound having various film-forming elements for example, silane (a generic name for silicon compounds), TEOS (TetraEthyl OrthoSililicate), TMA (TriMethyl Aluminum), tungsten fluoride (WF 6 ), etc.
- a source gas containing a compound having various film-forming elements for example, silane (a generic name for silicon compounds), TEOS (TetraEthyl OrthoSililicate), TMA (TriMethyl Aluminum), tungsten fluoride (WF 6 ), etc.
- various reaction gases are added and reacted to deposit a reaction product on the film formation substrate to form a film.
- This technique is carried out at a high temperature of several hundreds of degrees Celsius or higher in order to accelerate the reaction between gases and to improve the film quality on the film formation substrate. That is, in the chemical vapor deposition method, it is difficult to lower the temperature, and in many cases, the upper temperature limit of the organic material is exceeded.
- a SiO 2 film is formed on a substrate by using a high concentration ozone gas and TEOS gas at a high temperature of several hundreds of degrees Celsius or more (for example, Patent Document 1).
- Non-Patent Document 1 a method of forming an oxide film on a substrate on which a film is to be formed, by reacting a reactive raw material generated from a reaction between ozone gas and an unsaturated hydrocarbon with a CVD source gas (for example, Non-Patent Document 1).
- a film is formed by CVD in the vicinity where ozone gas, unsaturated hydrocarbon and source gas are mixed. Therefore, there is a possibility that the thickness of the oxide film formed on the film formation substrate may be uneven.
- the present invention has been made in view of the above circumstances, and when forming an oxide film on a deposition target substrate by the reaction of ozone gas, unsaturated hydrocarbon gas, and source gas, the film thickness distribution of the oxide film It is intended to provide a technique for reducing the bias of.
- an oxide film forming apparatus of the present invention for forming an oxide film on a film-forming substrate, comprising a processing furnace in which the film-forming substrate is disposed, and A shower head provided to face the processing surface of the film-forming substrate; the shower head has a first hole for supplying ozone gas to the film-forming substrate; and an unsaturated hydrocarbon gas for the film-forming substrate.
- the shower head is provided such that a gas supply surface of the shower head faces the processing surface of the film formation substrate at a distance of 1 mm or more and 100 mm or less, and the first hole and the second hole are formed.
- the diameter is 0.1 mm or more and 10 mm or less, and the interval between the adjacent first holes and the interval between the adjacent second holes is 1 mm or more and 100 mm or less.
- the processing furnace includes a first gas supply port to which the ozone gas is supplied and a second gas supply port to which the unsaturated hydrocarbon gas, the raw material gas or the mixed gas is supplied,
- a first gas buffer space for diffusing the ozone gas is provided between the first gas supply port and the showerhead, and the unsaturated hydrocarbon gas, the first gas buffer space between the second gas supply port and the showerhead.
- the second gas buffer space for diffusing the source gas or the mixed gas may be provided.
- first holes are arranged in a rectangular lattice shape at equal intervals in two directions orthogonal to each other along the processing surface, and the second holes are offset from the first holes along the processing surface.
- the positions may be those arranged in a rectangular lattice shape at equal intervals in the directions parallel to the two directions.
- the first hole may be formed along the outer peripheral portion of the shower head.
- the shower head may be a plate detachably provided inside the processing furnace.
- oxide film forming apparatus for forming an oxide film on a film-forming substrate, wherein a processing furnace in which the film-forming substrate is arranged and a processed surface of the film-forming substrate are provided.
- a shower head provided opposite to the shower head, wherein the shower head comprises a first slit for supplying ozone gas to the film formation base, and an unsaturated hydrocarbon gas and the oxide film on the film formation base.
- the two slits are arranged alternately in the lateral direction of the slit.
- the shower head is provided such that the gas supply surface of the shower head faces the processing surface of the film formation substrate at a distance of 1 mm or more and 100 mm or less, and the first slit and the second slit are provided.
- the slit width is 0.1 mm or more and 10 mm or less, and the distance between the slit centers of the adjacent first slits and the distance between the slit centers of the adjacent second slits are 1 mm or more and 100 mm or less.
- the oxide film when the oxide film is formed on the film formation substrate by the reaction of the ozone gas, the unsaturated hydrocarbon gas and the raw material gas, the deviation of the film thickness distribution of the oxide film is reduced.
- FIG. 3 is a plan view of a shower head included in the oxide film forming apparatus according to the first embodiment of the present invention.
- FIG. 4A is a diagram showing the result of measuring the thickness of the SiO 2 film in the surface direction
- FIG. 8B is a diagram showing the result of measuring the film thickness of the SiO 2 film taken along the line AA. It is a diagram illustrating a SiO 2 film thickness measurement result of which is formed without using a showerhead.
- FIG. 7 is a plan view of a shower head included in the oxide film forming apparatus according to the second embodiment of the present invention.
- an oxide film forming apparatus will be described in detail with reference to the drawings.
- an ozone gas having an ozone concentration of 100 vol%, ethylene gas as an unsaturated hydrocarbon gas, TEOS gas as a raw material gas, and nitrogen gas as a carrier gas are shown.
- an unsaturated hydrocarbon gas, a source gas or a carrier gas, which is described in detail later, is used the oxide film can be similarly formed.
- an oxide film forming apparatus 1 includes an ozone gas generator 2 (or a cylinder filled with high concentration ozone gas), an ethylene gas cylinder 3, a TEOS gas cylinder 4, and nitrogen.
- a gas cylinder 5 and a processing furnace 6 (chamber) for performing a film forming process are provided.
- the ozone gas generator 2 supplies ozone gas to the processing furnace 6.
- the ozone gas generator 2 is connected to the processing furnace 6 via a pipe 2a.
- the pipe 2a is provided with a variable flow rate valve V 1 to individually control the flow rate of ozone gas.
- the flow rate of the pipe 2a is calculated, for example, based on the differential pressure between the primary pressure and the secondary pressure of the valve V 1 and the cross-sectional area of the pipe 2a.
- the ethylene gas cylinder 3 supplies ethylene gas to the processing furnace 6.
- the ethylene gas cylinder 3 is connected to the processing furnace 6 via a pipe 3a.
- the pipe 3a, the valve V 2 of the variable flow rate is provided, the flow control ethylene gas is performed separately.
- the pipe 3a is equipped with a measuring device such as a mass flow meter for measuring the flow rate of ethylene gas.
- the TEOS gas cylinder 4 supplies TEOS gas to the processing furnace 6.
- the TEOS gas cylinder 4 is connected to the processing furnace 6 via a pipe 4a and a pipe 3a.
- the pipe 4a the is provided a flow rate variable valve V 3, flow rate control of the TEOS gas is performed separately.
- the flow rate of the TEOS gas is calculated, for example, based on the differential pressure between the primary pressure and the secondary pressure of the valve V 3 and the cross-sectional area of the pipe 4a.
- a vaporization chamber 7 is provided in the pipe 4a. For example, in the vaporization chamber 7, TEOS is heated to 70° C. or higher, and TEOS which is a liquid at room temperature is vaporized in the vaporization chamber 7 and then supplied to the processing furnace 6.
- the nitrogen gas cylinder 5 supplies nitrogen gas as a carrier gas for sending the TEOS gas to the processing furnace 6.
- the carrier gas in addition to nitrogen, for example, an inert gas such as argon is used.
- the nitrogen gas cylinder 5 is connected to the processing furnace 6 via a pipe 5a, a pipe 4a and a pipe 3a.
- the pipe 5a is provided with a variable flow rate valve V 4 , and the flow rate of nitrogen gas is individually controlled.
- the nitrogen gas (and other carrier gas) supplied from the nitrogen gas cylinder 5 can stir or purge the gas in the processing furnace 6.
- a film-forming substrate 8 on which an oxide film is formed is arranged in the processing furnace 6.
- an oxide film SiO 2 film in this embodiment
- the processing furnace 6 is a cold wall furnace because decomposition of ozone and the like on the wall surface of the processing furnace 6 is suppressed.
- An exhaust pipe 9 is connected to the processing furnace 6.
- the exhaust pipe 9 is provided with a vacuum pump 10 and an exclusion cylinder 11 for decomposing residual gas after exhaust, and the gas in the processing furnace 6 is released into the atmosphere through the exclusion cylinder 11.
- the exhaust pipe 9 is provided with a variable flow rate valve V 5 , and the valve V 5 controls the pressure in the processing furnace 6 during the film forming process.
- Fig. 2 shows the details of the processing furnace 6.
- the processing furnace 6 includes a furnace housing 6a in which the film formation substrate 8 is arranged, a furnace lid 6b, and a mixed gas diffusion portion 6c.
- a shield plate 12 is provided on the inner side of the furnace lid 6b inside the furnace housing 6a. Then, the mixed gas diffusion portion 6c is provided on the furnace lid 6b via the shield plate 12.
- a shower head plate 13 is provided on the surface of the mixed gas diffusion portion 6c opposite to the surface on which the shielding plate 12 is provided.
- Each component of the processing furnace 6 has, for example, a structure in which the pressure inside the processing furnace 6 is fixed by a vacuum specification that can reach 1 Pa or less.
- the shielding plate 12 is formed with a hole 12a through which ozone gas passes and a hole 12b through which mixed gas passes. Further, an ozone gas passage portion 14 through which the ozone gas passes is provided on the side of the hole 12a through which the ozone gas passes, where the mixed gas diffusion portion 6c is provided.
- the ozone gas passage portion 14 is, for example, a tubular member. The ozone gas that has passed through the holes 12a of the shielding plate 12 passes through the ozone gas passage portion 14, so that the ozone gas is provided in the furnace housing 6a without being mixed with other gas in the mixed gas diffusion portion 6c.
- the furnace housing 6a is formed of, for example, aluminum or SUS material (stainless steel) (the same applies to the furnace lid 6b, the mixed gas diffusion portion 6c, and the shielding plate 12).
- a sample stage 15 (heating susceptor) is provided in the furnace case 6 a, and the film formation substrate 8 is placed on the sample stage 15.
- the sample table 15 is made of, for example, quartz glass or SiC material in addition to aluminum or SUS material.
- a heater (not shown) that heats the sample table 15, for example, a light source that emits infrared rays, which is used as a heating unit in semiconductor manufacturing technology, is applied.
- the heating means is preferably capable of heating up to about 200° C., for example.
- the furnace lid 6b is provided so as to close the opening 16 formed in the upper part of the furnace housing 6a.
- An ozone gas buffer space 17 and a mixed gas passage 18 are formed in the furnace lid 6b.
- the ozone gas buffer space 17 has an opening on the furnace housing 6a side, and a shielding plate 12 is provided so as to cover the opening.
- An ozone gas introducing unit 19 to which the pipe 2a is connected is provided above the ozone gas buffer space 17, and ozone gas is supplied from the pipe 2a to the ozone gas buffer space 17 via the ozone gas introducing unit 19.
- a gas flow diffusion plate 20 is provided in the ozone gas buffer space 17.
- the mixed gas passage portion 18 is formed so as to penetrate the furnace lid 6b.
- a pipe 3a is connected to an outer end of the furnace case 6a of the mixed gas passage portion 18. Further, the end portion on the inner side of the furnace casing 6a of the mixed gas passage portion 18 communicates with the inside of the mixed gas diffusion portion 6c through a hole 12b formed in the shielding plate 12. Therefore, the mixed gas obtained by mixing the ethylene gas, the TEOS gas, and the nitrogen gas is supplied from the pipe 3a to the inside of the mixed gas diffusion unit 6c through the mixed gas passage unit 18. At least one mixed gas passage portion 18 is provided around the ozone gas buffer space 17.
- the mixed gas passages 18 are provided at equal intervals so as to surround the ozone gas buffer space 17, the deviation of the flow rate of the mixed gas is reduced.
- the flow channel cross-sectional area of the mixed gas passage portion 18 is, for example, the same as the flow channel cross-sectional area of the pipe 3 a connected to the mixed gas passage portion 18.
- the gas flow diffusion plate 20 has, for example, a circular plate shape, and is arranged so as to face the opening surface of the ozone gas introduction unit 19.
- the gas flow diffusion plate 20 is provided on the ceiling of the ozone gas buffer space 17 by a hook or the like. It is preferable that the size of the gas flow diffusion plate 20 is larger than the opening surface of the ozone gas introduction part 19 so that the ozone gas flowing from the ozone gas introduction part 19 cannot be directly sprayed to the shielding plate 12. Further, as the gas flow diffusion plate 20 becomes larger, the flow resistance of ozone gas passing near the gas flow diffusion plate 20 increases, so the diameter of the gas flow diffusion plate 20 is, for example, 1 of the cross-sectional area of the ozone gas buffer space 17. About /2 is preferable. Further, the gas flow diffusion plate 20 is provided between the ceiling portion of the ozone gas buffer space 17 and the shielding plate 12 or on the ozone gas introducing portion 19 side with respect to the middle. The thinner the gas flow diffusion plate 20, the more preferable.
- the mixed gas diffusion portion 6c is a box having an opening at the end contacting the shield plate 12.
- a mixed gas buffer space 21 is formed by the inner wall surface of the mixed gas diffusion portion 6c and the shield plate 12.
- a hole 21a through which ozone gas passes and a hole 21b through which mixed gas passes are formed on an end surface of the mixed gas diffusion portion 6c which is in contact with the shower head plate 13.
- the hole 21a is provided with the ozone gas passage portion 14.
- the shower head plate 13 is provided so as to face the processing surface of the film formation substrate 8.
- the shower head plate 13 has holes 13a through which ozone gas passes and holes 13b through which mixed gas passes.
- the holes 13a and 13b are arranged periodically (in the form of a plane lattice such as a rectangular lattice, an orthorhombic lattice, or a parallel body lattice or a concentric circle).
- the shower head plate 13 is formed of, for example, quartz glass or SiC material in addition to aluminum or SUS material.
- the film formation substrate 8 is formed.
- the thickness of the formed CVD film (SiO 2 film in the embodiment) is less uneven, which is preferable.
- the holes 13a and 13b of the shower head plate 13 are arranged in a square lattice, for example.
- the holes 13a are arranged at equal intervals in two directions orthogonal to each other along the processing surface of the film-forming substrate 8 (two d 1 directions depicted in the vertical and horizontal directions in FIG. 3). They are arranged in a rectangular grid.
- the holes 13b are displaced from the holes 13a along the processing surface of the film-forming substrate 8 (in FIG. 3, half of the arrangement interval of the holes 13a is displaced (to the face center side of the rectangular lattice related to the holes 13a). )), which are parallel to the two directions (in FIG.
- two d 2 directions depicted in the up, down, left, and right directions in the drawing) are arranged at equal intervals in a rectangular grid pattern.
- one of the holes 13a and 13b is located at the face center side position of the rectangular lattice, and the other is located (for example, the face center side position of the rectangular lattice related to the hole 13a.
- the hole 13b is located at the position).
- the arrangement of the holes 13a and 13b of the shower head plate 13 differs depending on the shape of the film-forming substrate 8.
- the lattice spacings d 1 and d 2 of the holes 13a and 13b are, for example, preferably 1 mm to 100 mm, more preferably 5 mm to 30 mm.
- the distance d 3 between the holes 13a and 13b is preferably, for example, 0.7 mm to 71 mm, more preferably 3.5 mm to 22 mm.
- the intervals d 1 to d 3 are intervals between the centers of the holes 13a and 13b.
- the hole diameter (diameter ⁇ ) of the holes 13a and 13b is, for example, preferably 0.1 mm to 10 mm, more preferably 0.5 mm to 2 mm.
- the diameters of the holes 13a and 13b are determined according to the shapes of the ozone gas buffer space 17 and the mixed gas buffer space 21. For example, when the ozone gas buffer space 17 and the mixed gas buffer space 21 cannot be large in size, the gas flow velocity and pressure are likely to be non-uniform, so the hole diameters of the holes 13a and 13b are reduced to increase the pressure loss. As a result, the uniformity of gas distribution in the ozone gas buffer space 17 and the mixed gas buffer space 21 is improved.
- holes 13a for supplying ozone gas may be formed along the outer periphery of the shower head plate 13, and holes 13a and 13b may be formed inside thereof. That is, by providing the hole 13a through which ozone gas is provided on the outermost side, unreacted substances that are easily adsorbed on the furnace wall of the furnace housing 6a are exposed to ozone. As a result, the reaction between the unreacted material and ozone is promoted, and the adhesion of the unreacted material to the furnace wall of the furnace housing 6a, the inner wall of the exhaust passage, and the like is suppressed.
- the ozone gas is supplied to the ozone gas introduction part 19 through the pipe 2a.
- the ozone gas introduced into the ozone gas introduction unit 19 is diffused in the ozone gas buffer space 17.
- the size of the ozone gas buffer space 17 is designed so that the gas flow rate and pressure of the ozone gas passing through the holes 12a of the shield plate 12 and the ozone gas passages 14 are the same.
- the volume of the ozone gas buffer space 17 is preferably as large as possible. For example, by setting the volume of the ozone gas buffer space 17 to be 1/2 or more of the space formed between the gas supply surface of the shower head plate 13 and the processing surface of the film formation substrate 8, The distribution of gas flow rate and pressure can be made uniform.
- the gas flow diffusion plate 20 in the ozone gas buffer space 17, the flow velocity and pressure distribution of the ozone gas passing through each hole 12a of the shield plate 12 and each ozone gas passage portion 14 are made more uniform.
- the ozone gas that has reached the shower head plate 13 is sprayed onto the film formation substrate 8 through the holes 13a.
- the mixed gas (a mixed gas of ethylene gas, TEOS gas and nitrogen gas) is introduced into each mixed gas passage portion 18 from the pipe 3a.
- the mixed gas introduced into the mixed gas passage portion 18 is diffused into the mixed gas buffer space 21.
- the size of the mixed gas buffer space 21 is designed so that the gas flow and pressure of the mixed gas passing through the holes 21b of the mixed gas diffusion portion 6c and the holes 13b of the shower head plate 13 are uniform.
- the larger the volume of the mixed gas buffer space 21 is, the more preferable it is. It is possible to make the gas flow rate and the pressure distribution of the gas uniform.
- the ozone gas and the mixed gas ejected from the shower head plate 13 reach the film formation target substrate 8 while mixing and causing a chemical reaction in the space between the shower head plate 13 and the film formation target substrate 8. Then, the gas provided on the film formation substrate 8 and the gas after the reaction flow in the outer peripheral direction of the film formation substrate 8 and pass through a plurality of exhaust ports 22 provided in the side wall portion of the furnace casing 6a. Is exhausted to the outside of the processing furnace 6.
- Ozone gas, a raw material gas containing various film-forming elements, and an unsaturated hydrocarbon gas are supplied to the processing furnace 6 in which the film-forming substrate 8 is arranged, and the film-forming substrate 8 is formed by a chemical vapor deposition method (CVD method). An oxide film is formed on top.
- CVD method chemical vapor deposition method
- the film-forming substrate 8 is a substrate, a film, or the like.
- the oxide film forming method using ozone and unsaturated hydrocarbon can form an oxide film at a low temperature, so that not only a substrate having relatively high heat resistance such as a Si substrate but also heat resistance can be compared.
- An oxide film can be formed on a substrate or film formed of a synthetic resin having a relatively low temperature.
- the synthetic resin forming the substrate or film include polyester resin, aramid resin, olefin resin, polypropylene, PPS (polyphenylene sulfide), PET (polyethylene terephthalate) and the like.
- PE polyethylene
- POM polyoxymethylene or acetal resin
- PEEK polyether ether ketone
- ABS resin acrylonitrile, butadiene, styrene copolymer synthetic resin
- PA polyamide
- PFA fluorine
- Polyethylene perfluoroalkoxyethylene copolymer
- PI polyimide
- PVD polyvinyl dichloride
- the ozone concentration (volume% concentration) of ozone gas is preferably 20 to 100 vol%, more preferably 80 to 100 vol%. This is because the closer the ozone concentration is to 100 vol%, the higher the density of the reactive species (OH) generated from ozone can reach the surface of the film-forming substrate.
- This reactive species (OH) reacts with carbon (C), which is an impurity in the film, in addition to the reaction required for chemical vapor deposition, and this carbon (C) can be removed as a gas. Therefore, by supplying a larger amount of reactive active species (OH) to the surface of the film-forming substrate, it is possible to form an oxide film with less impurities.
- the higher the ozone concentration that is, the lower the oxygen concentration
- the longer the life of atomic oxygen (O) generated by separation of ozone tends to be. Therefore, it is preferable to use a high concentration ozone gas. preferable. That is, by increasing the ozone concentration, the oxygen concentration decreases, and deactivation of atomic oxygen (O) due to collision with oxygen molecules is suppressed.
- the process pressure of the oxide film forming process can be reduced by increasing the ozone concentration, it is preferable to use a high-concentration ozone gas from the viewpoint of gas flow controllability and gas flow improvement.
- the flow rate of the ozone gas is, for example, preferably 0.2 sccm or more, more preferably 0.2 to 1000 sccm.
- sccm is 1 atm (1013 hPa) and ccm (cm 3 /min) at 25°C.
- the flow rate of the ozone gas is set to be at least twice the total flow rate of the unsaturated hydrocarbon gas and the raw material gas, so that the oxide film is formed at a good film formation rate. Can be formed.
- High-concentration ozone gas can be obtained by liquefying and separating only ozone from the ozone-containing gas based on the difference in vapor pressure, and then vaporizing the liquefied ozone again.
- An apparatus for obtaining high-concentration ozone gas is disclosed, for example, in Japanese Patent Laid-Open No. 2001-304756 and Japanese Patent Laid-Open No. 2003-20209. These devices that generate high-concentration ozone gas generate high-concentration ozone (ozone concentration ⁇ 100 vol%) by liquefying and separating only ozone based on the difference in vapor pressure between ozone and another gas (for example, oxygen). ing.
- the source gas is an element that forms an oxide film (for example, lithium (Li), magnesium (Mg), silicon (Si), titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron ( Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), gallium (Ga), germanium (Ge), yttrium (Y), zirconium (Zr), molybdenum (Mo), ruthenium ( Ru), rhodium (Rh), indium (In), tin (Sn), tungsten (W), iridium (Ir), platinum (Pt), lead (Pb), etc., and these elements are hereinafter referred to as metals or metal elements.)
- a raw material gas containing is used as a constituent element.
- a raw material gas containing an organic silicon having a Si—O bond or a Si—C bond or an organic metal having a metal element-oxygen bond or a metal element-carbon bond, a metal halide, an organometallic complex, silicon or a metal Raw material gas such as hydride is used.
- silane generally term for hydrogen silicate
- TEOS TetraEthyl OrthoSillicate
- TMS TriMthoxySilane
- TES TriEthoxySilane
- TMA TriMethylaluminum
- TEMAZ Tetramethyl
- TEMAZL Ethyl orchis
- Tungsten silicide (WF 6 ) or the like is used.
- a heterogeneous binuclear complex containing not only one kind of metal element but also plural kinds of metal elements can be used as a source gas.
- the flow rate of the raw material gas is, for example, preferably 0.1 sccm or more, more preferably 0.1 to 500 sccm.
- the unsaturated hydrocarbon a hydrocarbon having a double bond exemplified by ethylene (alkene) or a hydrocarbon having a triple bond exemplified by acetylene (alkyne) is used.
- a low molecular weight unsaturated hydrocarbon such as butylene (for example, an unsaturated hydrocarbon having a carbon number n of 4 or less) is preferably used.
- the flow rate of the unsaturated hydrocarbon gas is, for example, preferably 0.1 sccm or more, more preferably 0.1 to 500 sccm.
- FIG. 4 shows the film thickness distribution of the SiO 2 film formed by the oxide film forming apparatus 1.
- the oxide film forming apparatus 1 an apparatus capable of forming a film on the film forming substrate 8 having a diameter of 75 mm was used.
- a Si substrate was used as the film-forming substrate 8.
- film formation was performed for 3 minutes at a furnace pressure of the processing furnace 6 of about 30 Pa under the conditions of ozone gas 100 sccm (100 vol% concentration), ethylene gas 64 sccm, TEOS gas 1 sccm, and nitrogen gas 15 sccm.
- the film thickness distribution within the range shown by the solid line in the figure ( ⁇ 60 mm from the substrate center) was within 5%, and uniformity was achieved. That is, as shown in FIG. 4B, a uniform film thickness was realized at 30 mm from the substrate center, and the film thickness decreased in the periphery of the film as the distance from the substrate center increased. It is considered that this is because in the peripheral portion of the substrate, it takes a long time for the gas ejected from the shower head plate 13 to reach the gas, so that the CVD reaction is partially completed before reaching the gas.
- FIG. 5 shows the result of forming an oxide film on the deposition target substrate 8 (specifically, an 8-inch Si wafer) by chemical vapor deposition at room temperature (25° C.) without using the shower head plate 13 ( The film thickness distribution (nm) of SiO 2 is shown.
- the film forming range in FIG. 5 corresponds to the range surrounded by the solid line in FIG.
- an arrow A indicates a supply position of ozone gas
- a range B surrounded by a dotted line indicates a supply position of ethylene gas and TEOS gas.
- the ethylene gas and the TEOS gas were supplied from above the processing surface of the film formation substrate 8 toward the processing surface.
- the arrow C indicates the position of the exhaust port 22.
- the formation of the oxide film was performed for 3 minutes at a processing pressure of about 50 Pa in the processing furnace 6 under gas flow conditions in which the flow rate of ozone gas was 100 sccm, the flow rate of ethylene gas was 64 sccm, and the flow rate of TEOS gas was 0.3 sccm.
- the maximum film thickness of the oxide film was 138 nm, and the maximum film formation rate was 46 nm/min.
- the oxide film (SiO 2 film) could be formed at a high film formation rate.
- a film is often formed at a portion where the ozone gas and the mixed gas collide with each other, such as the central portion of the film-forming substrate 8, and an oxide film is formed only about half of the central portion at the end portion on the downstream side of the ozone gas. Was not done. It is considered that this is because the film formation process did not proceed because ozone was consumed by the reaction for forming the oxide film.
- the oxide film forming apparatus according to the second embodiment of the present invention differs from the oxide film forming apparatus 1 of the first embodiment in the structure of the shower head plate 23. Therefore, the same components as those of the oxide film forming apparatus 1 of the first embodiment are designated by the same reference numerals, and different portions will be described in detail.
- the shower head plate 23 for supplying the ozone gas or the mixed gas to the film formation substrate 8 has a rectangular ejection hole (slit structure).
- the oxide film forming apparatus includes a processing furnace 6.
- the processing furnace 6 includes a furnace housing 6a, a furnace lid 6b, and a mixed gas diffusion portion 6c.
- a shield plate 12 is provided inside the furnace cover 6b inside the furnace housing 6a, and a mixed gas diffusion portion 6c is provided on the furnace cover 6b via the shield plate 12.
- a shower head plate 23 is provided on the surface of the mixed gas diffusion portion 6c opposite to the surface on which the shield plate 12 is provided.
- the shower head plate 23 is provided so as to face the processing surface of the film formation substrate 8.
- the shower head plate 23 is formed of, for example, quartz glass or SiC material in addition to aluminum or SUS material.
- the distance L between the end surface (gas supply surface) of the shower head plate 23 and the processing surface of the film-forming substrate 8 is, for example, 1 mm to 100 mm, more preferably 5 mm to 30 mm, so that The thickness of the formed CVD film (SiO 2 film in the embodiment) is less uneven, which is preferable.
- the shower head plate 23 is formed with a slit 23a through which ozone gas passes and a slit 23b through which a mixed gas (a mixed gas in which ethylene gas, TEOS gas and nitrogen gas are mixed) passes.
- the slits 23a and 23b are alternately arranged adjacent to each other in the lateral direction of the slits 23a and 23b.
- the distance d 4 between the slits 23a and 23a and the distance d 5 between the slits 23b and 23b are preferably 1 mm to 100 mm, more preferably 5 mm to 50 mm.
- the distance d 6 between the slits 23a and the slits 23b is preferably 0.5 mm to 50 mm, more preferably 2.5 mm to 25 mm.
- the distances d 4 to d 6 are the distances between the centers of the slits.
- the slit width of the slits 23a and 23b (that is, the width of the openings of the slits 23a and 23b in the lateral direction) is preferably 0.1 mm to 10 mm, more preferably 0.5 mm to 2 mm.
- the slit widths of the slits 23a and 23b are determined by the shapes of the ozone gas buffer space 17 and the mixed gas buffer space 21. That is, when the space size of the ozone gas buffer space 17 or the mixed gas buffer space 21 cannot be made large and the gas flow velocity and pressure are non-uniform, the slit width of the slit 23a (or the slit 23b) should be reduced to increase the pressure loss.
- the slit lengths of the slits 23a and 23b are appropriately changed depending on the size of the film formation substrate 8. Further, by providing the slits 23a to which ozone gas is supplied in the outermost (uppermost and lowermost in FIG. 6) slits, the reaction between the ozone gas and the unreacted adsorbent is promoted, and the inner wall of the processing furnace 6 is promoted. And the deposits on the inner wall of the exhaust passage are reduced.
- the ozone gas passage portion that connects the ozone gas buffer space 17 and the furnace housing 6a is a rectangular parallelepiped channel having the cross section of the slit 23a. Therefore, the mixed gas flowing through the mixed gas buffer space 21 flows so as to bypass the ozone gas passage portion.
- the mixed gas passage portion 18 formed on the furnace lid 6b is provided so as to sandwich the slits 23a and 23b in the direction in which the slits 23a and 23b are aligned.
- the mixed gas passage portion 18 is provided in the furnace lid 6b so as to be located above and below in FIG.
- the shower head structure is provided, and the gas supply surfaces of the shower head plates 13 and 23 and the processing surface of the deposition target substrate 8 are processed.
- the holes 13a and 13b or the slits 23a and 23b formed in the shower head plates 13 and 23 are set to predetermined values, the film thickness of the oxide film formed on the film-forming substrate 8 is set.
- the distribution can be made more uniform. That is, since a uniform oxide film can be formed centering on the portion of the substrate 8 to be processed that faces the central portions of the shower head plates 13 and 23, a uniform oxide film is formed at the target position on the film-forming substrate 8. can do.
- the oxide film forming apparatus not only has a small film-forming substrate 8 having a diameter of 6 cm, but also a large area having a diameter of 10 cm or more, further 30 cm or more. It is suitable as an apparatus for forming an oxide film having a more uniform film thickness distribution on the film forming substrate 8.
- ozone gas and mixed gas are mixed after passing through the shower head plates 13 and 23 to generate active species. Further, by uniformly supplying the active species and the raw material gas to the processed surface of the film formation base 8, a more uniform oxide film can be formed on the film formation base 8.
- adsorbed substances are generated on the shower head plates 13 and 23 in the film forming process. Therefore, by equipping the processing furnace 6 with the shower head plates 13 and 23 in a detachable manner, the shower head plates 13 and 23 can be removed periodically to be replaced or washed.
- an oxide film can be formed on the film-forming substrate 8 at a low temperature of 200° C. or lower.
- an oxide film can be formed on the film-forming substrate 8 (substrate or film) formed of a material having a low heat resistance temperature (for example, an organic material such as synthetic resin).
- the oxide film can be formed on the film formation base 8 without using plasma, damage to the film formation base 8 is suppressed.
- a thin film for example, a base film (mainly an organic thin film) that constitutes an electronic device) is formed in advance before forming an oxide film (for example, a SiO 2 film) on an electronic device or an organic film. Even in this case, the oxide film can be formed on the electronic device or the organic film without damaging the thin film such as dielectric breakdown.
- the oxide film forming apparatus can form an oxide film at a high film forming rate under a processing condition of 200° C. or lower.
- the oxide film formed in the example has a withstand voltage of 5 MV/cm, and the oxide film forming method according to the embodiment of the present invention forms an oxide film with excellent withstand voltage and gas barrier property. can do.
- the temperature at which a film is formed on a material that requires gas barrier properties is 80°C or lower. Therefore, the oxide film forming method according to the embodiment of the present invention can be suitably applied to the oxide film formation for a material required to have a gas barrier property.
- the oxide film forming apparatus of the present invention has been described above with reference to the specific embodiments, the oxide film forming apparatus of the present invention is not limited to the embodiments and is appropriately designed within a range that does not impair the characteristics thereof. Those that can be changed and whose design has been changed belong to the technical scope of the present invention.
- the ozone gas is supplied to the central portion of the furnace lid, but it is also possible to supply the mixed gas to the central portion of the furnace lid.
- the mixed gas may be individually supplied to the processing furnace and mixed in the processing furnace.
- a gas buffer space similar to that of the embodiment may be provided between each gas supply pipe and the shower head plate.
- the shower head plate When the shower head plate is provided with holes from which each gas is ejected, the distance between the shower head and the film-forming substrate, the distance between the holes from which ozone gas is ejected and the holes from which unsaturated hydrocarbon gas or source gas is ejected, and By setting the hole diameter from which the gas is ejected to the same range as in the embodiment, a uniform oxide film can be formed on the film formation substrate.
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Abstract
Description
Claims (6)
- 被成膜基体に酸化膜を形成する酸化膜形成装置であって、
前記被成膜基体が配置される処理炉と、
前記被成膜基体の処理面と対向して備えられるシャワーヘッドと、を備え、
前記シャワーヘッドは、
前記被成膜基体にオゾンガスを供給する第1孔と、
前記被成膜基体に不飽和炭化水素ガス、前記酸化膜を構成する元素であるSiまたは金属元素を構成元素として含む原料ガス、または、前記不飽和炭化水素ガスと前記原料ガスを混合した混合ガスを供給する第2孔と、を備え、
前記シャワーヘッドは、当該シャワーヘッドのガス供給面が前記被成膜基体の処理面に対して1mm以上、100mm以下離れた距離に向かい合って備えられ、
前記第1孔および前記第2孔の直径は、0.1mm以上、10mm以下であり、
隣り合う第1孔の間隔および隣り合う第2孔の間隔は、1mm以上、100mm以下である、酸化膜形成装置。 - 前記処理炉は、
前記オゾンガスが供給される第1ガス供給口と、
前記不飽和炭化水素ガス、前記原料ガスまたは前記混合ガスが供給される第2ガス供給口と、を備え、
前記第1ガス供給口と前記シャワーヘッドの間には、前記オゾンガスを拡散させる第1ガスバッファ空間が備えられ、
前記第2ガス供給口と前記シャワーヘッドの間には、前記不飽和炭化水素ガス、前記原料ガスまたは前記混合ガスを拡散させる第2ガスバッファ空間が備えられた、請求項1に記載の酸化膜形成装置。 - 前記第1孔は、前記処理面に沿って互いに直交する2方向において等間隔で並んで矩形格子状に配置され、
前記第2孔は、前記処理面に沿って前記第1孔から偏倚した位置であって、前記2方向にそれぞれ平行な方向において等間隔で並んで矩形格子状に配置された、請求項1または請求項2に記載の酸化膜形成装置。 - 前記シャワーヘッドの外周部に沿って、前記第1孔が形成された、請求項1から請求項3のいずれか1項に記載の酸化膜形成装置。
- 前記シャワーヘッドは、前記処理炉内部に着脱可能に備えられる板である、請求項1から請求項4のいずれか1項に記載の酸化膜形成装置。
- 被成膜基体に酸化膜を形成する酸化膜形成装置であって、
前記被成膜基体が配置される処理炉と、
前記被成膜基体の処理面と対向して備えられるシャワーヘッドと、を備え、
前記シャワーヘッドは、
前記被成膜基体にオゾンガスを供給する第1スリットと、
前記被成膜基体に不飽和炭化水素ガス、前記酸化膜を構成する元素であるSiまたは金属元素を構成元素として含む原料ガス、または、前記不飽和炭化水素ガスと前記原料ガスを混合した混合ガスを供給する第2スリットと、を備え、
前記第1スリットと前記第2スリットは、スリットの短手方向に交互に並んで備えられ、
前記シャワーヘッドは、当該シャワーヘッドのガス供給面が前記被成膜基体の処理面に対して1mm以上、100mm以下離れた距離に向かい合って備えられ、
前記第1スリットおよび前記第2スリットのスリット幅は、0.1mm以上、10mm以下であり、
隣り合う第1スリットのスリット中心間の間隔および隣り合う第2スリットのスリット中心間の間隔は、1mm以上、100mm以下である、酸化膜形成装置。
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JP2019551404A JP6702514B1 (ja) | 2018-11-30 | 2019-09-05 | 酸化膜形成装置 |
CN201980078450.3A CN113196455B (zh) | 2018-11-30 | 2019-09-05 | 氧化膜形成装置 |
US17/297,652 US11306396B2 (en) | 2018-11-30 | 2019-09-05 | Oxide film forming device |
KR1020217019238A KR102390560B1 (ko) | 2018-11-30 | 2019-09-05 | 산화막 형성 장치 |
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CN113196455A (zh) | 2021-07-30 |
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