WO2009087906A1 - 成膜方法および成膜装置 - Google Patents
成膜方法および成膜装置 Download PDFInfo
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- WO2009087906A1 WO2009087906A1 PCT/JP2008/073546 JP2008073546W WO2009087906A1 WO 2009087906 A1 WO2009087906 A1 WO 2009087906A1 JP 2008073546 W JP2008073546 W JP 2008073546W WO 2009087906 A1 WO2009087906 A1 WO 2009087906A1
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- WIPO (PCT)
- Prior art keywords
- carboxylic acid
- metal salt
- substrate
- gas
- acid metal
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 91
- 229910052751 metal Inorganic materials 0.000 claims abstract description 290
- 239000002184 metal Substances 0.000 claims abstract description 290
- 239000000758 substrate Substances 0.000 claims abstract description 139
- 150000007942 carboxylates Chemical class 0.000 claims abstract description 41
- 238000000151 deposition Methods 0.000 claims abstract description 9
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 231
- 150000003839 salts Chemical class 0.000 claims description 184
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 100
- HFDWIMBEIXDNQS-UHFFFAOYSA-L copper;diformate Chemical compound [Cu+2].[O-]C=O.[O-]C=O HFDWIMBEIXDNQS-UHFFFAOYSA-L 0.000 claims description 99
- 239000010949 copper Substances 0.000 claims description 91
- 238000006243 chemical reaction Methods 0.000 claims description 65
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 52
- 229910052802 copper Inorganic materials 0.000 claims description 51
- 235000019253 formic acid Nutrition 0.000 claims description 51
- 230000007246 mechanism Effects 0.000 claims description 51
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 48
- 238000012545 processing Methods 0.000 claims description 42
- 238000010438 heat treatment Methods 0.000 claims description 40
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 33
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 25
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 claims description 23
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 claims description 23
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims description 22
- 238000003860 storage Methods 0.000 claims description 17
- 239000000843 powder Substances 0.000 claims description 14
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 13
- 229910052709 silver Inorganic materials 0.000 claims description 13
- 239000004332 silver Substances 0.000 claims description 13
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 12
- 229910017052 cobalt Inorganic materials 0.000 claims description 11
- 239000010941 cobalt Substances 0.000 claims description 11
- 229910052759 nickel Inorganic materials 0.000 claims description 11
- 235000019260 propionic acid Nutrition 0.000 claims description 11
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 claims description 11
- 229940005605 valeric acid Drugs 0.000 claims description 11
- 235000011054 acetic acid Nutrition 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 5
- 230000008021 deposition Effects 0.000 claims description 2
- 230000026683 transduction Effects 0.000 claims description 2
- 238000010361 transduction Methods 0.000 claims description 2
- 150000001735 carboxylic acids Chemical class 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 156
- 239000010408 film Substances 0.000 description 153
- 235000012431 wafers Nutrition 0.000 description 106
- 239000002994 raw material Substances 0.000 description 27
- 238000012546 transfer Methods 0.000 description 21
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 description 19
- 238000000137 annealing Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 14
- 238000011068 loading method Methods 0.000 description 13
- 238000001816 cooling Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000004065 semiconductor Substances 0.000 description 10
- 238000001179 sorption measurement Methods 0.000 description 10
- 238000005755 formation reaction Methods 0.000 description 9
- 239000013078 crystal Substances 0.000 description 7
- 239000002243 precursor Substances 0.000 description 7
- 238000010926 purge Methods 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 6
- 210000002381 plasma Anatomy 0.000 description 6
- 229910021591 Copper(I) chloride Inorganic materials 0.000 description 5
- OXBLHERUFWYNTN-UHFFFAOYSA-M copper(I) chloride Chemical compound [Cu]Cl OXBLHERUFWYNTN-UHFFFAOYSA-M 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000011261 inert gas Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 239000006227 byproduct Substances 0.000 description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 4
- 239000012159 carrier gas Substances 0.000 description 4
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 description 4
- 229940112669 cuprous oxide Drugs 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 238000005979 thermal decomposition reaction Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000005240 physical vapour deposition Methods 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- FSGSLHGEFPNBBN-UHFFFAOYSA-M copper(1+);formate Chemical compound [Cu+].[O-]C=O FSGSLHGEFPNBBN-UHFFFAOYSA-M 0.000 description 2
- -1 cupric formate Chemical class 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000007792 gaseous phase Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- TZNFGOYNQQEGJT-UHFFFAOYSA-L copper;diformate;dihydrate Chemical compound O.O.[Cu+2].[O-]C=O.[O-]C=O TZNFGOYNQQEGJT-UHFFFAOYSA-L 0.000 description 1
- NOHDJXFJXJZYGO-UHFFFAOYSA-L copper;diformate;hydrate Chemical compound O.[Cu+2].[O-]C=O.[O-]C=O NOHDJXFJXJZYGO-UHFFFAOYSA-L 0.000 description 1
- COUNCWOLUGAQQG-UHFFFAOYSA-N copper;hydrogen peroxide Chemical compound [Cu].OO COUNCWOLUGAQQG-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000013110 organic ligand Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000000243 solution Substances 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
- 238000009834 vaporization Methods 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
Images
Classifications
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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
- C23C16/06—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 metallic material
- C23C16/18—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 metallic material from metallo-organic compounds
-
- 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
- C23C16/06—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 metallic material
- C23C16/16—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 metallic material from metal carbonyl compounds
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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
- C23C16/448—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 generating reactive gas streams, e.g. by evaporation or sublimation of precursor materials
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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
- C23C16/448—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 generating reactive gas streams, e.g. by evaporation or sublimation of precursor materials
- C23C16/4488—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 generating reactive gas streams, e.g. by evaporation or sublimation of precursor materials by in situ generation of reactive gas by chemical or electrochemical reaction
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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
- C23C16/46—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 heating the substrate
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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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
- C23C18/08—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of metallic material
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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
- 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
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/285—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation
- H01L21/28506—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers
- H01L21/28512—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table
- H01L21/28556—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table by chemical means, e.g. CVD, LPCVD, PECVD, laser CVD
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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
- H01L21/04—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
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/288—Deposition of conductive or insulating materials for electrodes conducting electric current from a liquid, e.g. electrolytic deposition
Definitions
- the present invention relates to a film forming method and a film forming apparatus for forming a metal film such as a copper film used as a semiconductor wiring.
- PVD physical vapor deposition
- MOCVD chemical vapor deposition
- the PVD method has poor step coverage and is difficult to embed in a fine pattern.
- impurities such as carbon (C), oxygen (O), fluorine (F), etc. from the side chain group coordinated to the Cu atom remain in the Cu film. It is difficult to improve the film quality.
- the side chain group coordinated to Cu atom is complicated, the raw material is very expensive. Moreover, since it is thermally unstable and has a low vapor pressure, it is difficult to supply a stable raw material gas.
- Patent Document 1 a CuCl plate is placed in a chamber, Ar gas plasma is generated to etch the CuCl plate, and CuCl desorbed species are generated.
- a technique is disclosed in which a dissociated species of Cu and Cl is generated from this desorbed species by Ar gas plasma, and the temperature of the substrate is made lower than the temperature of the CuCl plate to form a Cu film on the substrate by direct reduction. .
- this technique it is said that an inexpensive raw material can be used with a high deposition rate, and a Cu film in which no impurities remain in the film can be produced.
- Patent Document 1 it is difficult to completely remove Cl in the Cu film, and a trace amount of Cl may remain. Even if the residual amount of Cl is small, it causes an increase in wiring resistance and a decrease in reliability due to corrosion of the Cu wiring.
- the substrate surface is exposed to plasma at the initial stage of film formation, there is a concern that the substrate may be chemically or physically damaged.
- a low-k film used for wiring tends to cause an increase in dielectric constant and destruction of fine structure (plasma damage) due to these plasmas.
- the plasma also sputters members other than the CuCl plate inside the reactor, it causes damage to the members, impurities in the film due to the sputtered particles, and contamination contamination. Therefore, applying the technique of Patent Document 1 to a Cu multilayer wiring has the disadvantage that a costly mechanism or material must be required to overcome the above problems.
- Patent Document 2 discloses a method of manufacturing Cu wiring by using a cheap raw material by a method other than the wet plating method, other than the semiconductor manufacturing process. This is a method for producing a Cu thin film by applying copper diformate (Cu (OCHO) 2 ), which is an inexpensive organic Cu compound, or a hydrate thereof to a substrate and applying heat in a non-oxidizing atmosphere. is there. Similarly, a report of forming Cu wiring by heating copper dihydrate diformate coated on a substrate with laser light with a narrowed light diameter has been reported in A. Gupta and R.
- Non-Patent Document 1 discloses the fact that cupric formate becomes Cu by a thermal decomposition reaction. Although these methods can form a metal Cu film at low cost, they are not suitable for embedding metal in a fine shape processed at the nanometer level, such as a wiring of a super integrated circuit (ULSI). Therefore, the electrical conductivity also becomes worse than the original value of Cu.
- ULSI super integrated circuit
- Non-patent Document 3 it is known that the vaporized component generated inside the raw material container is cuprous formate. Copper formate (Cu (OCHO)), which is easily vaporized, is generated as a gas from copper diformate which is difficult to be vaporized by the reaction formula shown in the following formula (1), and this is transported to the substrate. 2Cu (OCHO) 2 ⁇ 2Cu (OCHO) + CO + CO 2 + H 2 O (1) As reported in Non-Patent Document 3, copper primary formate is a substance that is very easily thermally decomposed. Therefore, Cu can be easily formed from copper formate by the reaction formula shown in the following formula (2) at low temperature.
- Non-Patent Document 3 silver is cited as a metal species that exhibits the same reaction as an ant oxide, and silver can be formed as a wiring layer by a similar method. The same problem arises.
- An object of the present invention is to provide a film forming method and a film forming method capable of forming a high-quality metal film practically and inexpensively with good step coverage, stable supply of raw materials, and no deterioration of the raw materials.
- Another object is to provide a storage medium storing a program for executing such a method.
- a divalent carboxylic acid metal salt and a carboxylic acid are reacted to generate a monovalent carboxylic acid metal salt gas, and the monovalent carboxylic acid metal is formed on a substrate.
- a film forming method including supplying a salt gas, applying energy to the substrate, and decomposing the metal carboxylate supplied on the substrate to form a metal film.
- the divalent carboxylic acid metal salt is in a powder form, and a monovalent carboxylic acid metal salt gas is obtained by supplying a carboxylic acid gas or a liquid carboxylic acid thereto. be able to. Moreover, it is preferable to heat when making a bivalent carboxylic acid metal salt and carboxylic acid react.
- the substrate is placed in a processing vessel held in a vacuum, and a monovalent carboxylic acid metal salt gas generated by a reaction between the divalent carboxylic acid metal salt and carboxylic acid is introduced into the processing vessel.
- a monovalent carboxylic acid metal salt gas generated by a reaction between the divalent carboxylic acid metal salt and carboxylic acid is introduced into the processing vessel.
- the monovalent carboxylic acid metal salt is deposited on the substrate by supplying the monovalent carboxylic acid metal salt gas onto the substrate, and the monovalent carboxylic acid metal salt is deposited.
- the metal carboxylate on the substrate may be decomposed by applying energy to the substrate, or energy may be applied to the substrate while supplying the monovalent carboxylate metal salt gas onto the substrate. Also good.
- the metal can be selected from the group consisting of copper, silver, cobalt, and nickel
- the carboxylic acid can be selected from formic acid, acetic acid, propionic acid, valeric acid, and butyric acid.
- the divalent carboxylic acid metal salt is preferably second copper formate
- the carboxylic acid is formic acid
- the monovalent carboxylic acid metal salt gas is preferably first copper formate.
- a divalent carboxylic acid metal salt is reacted with the metal to generate a monovalent carboxylic acid metal salt gas, and the monovalent carboxylic acid metal is formed on a substrate.
- a film forming method including supplying a salt gas, applying energy to the substrate, and decomposing the metal carboxylate supplied on the substrate to form a metal film.
- a monovalent carboxylic acid metal salt gas can be obtained by heating in the state where the divalent carboxylic acid metal salt and the metal coexist.
- the substrate is placed on a substrate in a processing container held in a vacuum, and a monovalent carboxylic acid metal salt gas generated by a reaction between the divalent carboxylic acid metal salt and the metal is placed in the processing container. Can be introduced.
- the carboxylate is deposited on the substrate, and energy is applied to the substrate on which the carboxylate is deposited.
- the carboxylate on the substrate may be decomposed, or energy may be applied to the substrate while supplying the monovalent carboxylate gas onto the substrate.
- the metal can be selected from the group consisting of copper, silver, cobalt, and nickel, and formic acid, acetic acid can be used as the carboxylic acid constituting the divalent carboxylic acid metal salt.
- acetic acid can be used as the carboxylic acid constituting the divalent carboxylic acid metal salt.
- propionic acid, valeric acid, and butyric acid can be used.
- the divalent carboxylic acid metal salt is preferably second copper formate, and the monovalent carboxylate gas is preferably first copper formate.
- a processing container that is held in a vacuum and in which a substrate is disposed, a substrate support member that supports the substrate in the processing container, a divalent carboxylic acid metal salt, and a carboxylic acid, Generating a monovalent carboxylic acid metal salt gas, a gas supply mechanism for supplying the monovalent carboxylic acid metal salt gas onto the substrate in the processing vessel, and the substrate support member And an exhaust mechanism for exhausting the inside of the processing container, and the first carboxylate is decomposed by the energy provided by the energy application mechanism to form a metal film on the substrate.
- a film forming apparatus is provided.
- the gas generation mechanism includes a carboxylic acid gas generation unit that generates a carboxylic acid gas and the divalent carboxylic acid metal salt, and the carboxylic acid generated by the carboxylic acid gas generation mechanism. And a reaction part that generates a monovalent carboxylic acid metal salt by a reaction between the divalent carboxylic acid metal salt and a carboxylic acid gas supply pipe that supplies the monovalent carboxylic acid gas to the reaction part.
- the gas supply mechanism can be configured to have a carboxylic acid metal salt introduction part that guides the generated monovalent carboxylic acid metal salt gas to the processing vessel.
- reaction unit can be configured to have a reaction vessel for storing the divalent carboxylic acid metal salt powder.
- the carboxylic acid metal salt introduction portion may have a shower head that guides the monovalent carboxylic acid metal salt gas into a shower shape.
- the monovalent carboxylic acid metal salt gas is supplied onto the substrate by the gas supply mechanism, and the monovalent carboxylic acid metal salt is deposited on the substrate by the energy from the energy application mechanism.
- the deposited carboxylate may be decomposed, and energy is applied to the substrate by the energy application mechanism while the monovalent carboxylic acid metal salt gas is supplied onto the substrate by the gas supply mechanism. It can also be set as the structure made.
- the metal may be selected from the group consisting of copper, silver, cobalt, and nickel, and the carboxylic acid used in the gas generating means is formic acid, acetic acid, It may be selected from propionic acid, valeric acid, butyric acid.
- a processing container that is held in a vacuum and in which a substrate is disposed, a substrate support member that supports the substrate in the processing container, a divalent carboxylic acid metal salt, and the metal Generating a monovalent carboxylic acid metal salt gas, a gas supply mechanism for supplying the monovalent carboxylic acid metal salt gas onto the substrate in the processing vessel, and the substrate support member And an exhaust mechanism for exhausting the inside of the processing container, and the first carboxylic acid metal salt is decomposed by energy generated by the energy application mechanism to form a metal film on the substrate.
- a film forming apparatus is provided.
- the gas generation mechanism has a reaction part in which a divalent carboxylic acid metal salt and the metal are arranged and reacts them by heating, and the gas supply mechanism is It can be set as the structure which has a carboxylic acid metal salt introduction
- the carboxylic acid metal salt introduction part may have a shower head for guiding the monovalent carboxylic acid metal salt gas into a shower shape.
- the monovalent carboxylic acid metal salt gas is supplied onto the substrate by the gas supply mechanism, and the monovalent carboxylic acid metal salt is deposited on the substrate by the energy from the energy application mechanism.
- the deposited carboxylate may be decomposed, and energy is applied to the substrate by the energy applying mechanism while the monovalent carboxylic acid metal salt gas is supplied onto the substrate by the gas supply means. It can also be set as the structure made.
- the metal may be selected from the group consisting of copper, silver, cobalt, and nickel
- the carboxylic acid constituting the divalent carboxylic acid metal salt is: It can be selected from formic acid, acetic acid, propionic acid, valeric acid, butyric acid.
- the energy application mechanism a mechanism that applies thermal energy to the substrate can be suitably used.
- a storage medium that operates on a computer and stores a program for controlling a film forming apparatus, wherein the program is a divalent carboxylic acid metal salt at the time of execution. And a carboxylic acid are reacted to generate a monovalent carboxylic acid metal salt gas, the monovalent carboxylic acid metal salt gas is supplied onto the substrate, energy is applied to the substrate, and the substrate is supplied onto the substrate.
- a storage medium that allows a computer to control a film forming apparatus so that a film forming method including decomposing the metal carboxylate formed to form a metal film is performed.
- a storage medium that operates on a computer and stores a program for controlling a film forming apparatus, wherein the program is a divalent carboxylic acid metal salt at the time of execution. And reacting the metal with the metal to generate a monovalent carboxylic acid metal salt gas, supplying the monovalent carboxylic acid metal salt gas onto the substrate, applying energy to the substrate, and supplying the substrate with the energy.
- a storage medium that allows a computer to control a film forming apparatus so that a film forming method including decomposing the metal carboxylate formed to form a metal film is performed.
- a divalent carboxylic acid metal salt such as cupric formate
- a divalent carboxylic acid metal salt such as cupric formate
- carboxylic acid or the metal constituting the metal salt such as copper
- thermally decomposed with low energy By supplying a monovalent carboxylic acid metal salt, for example, cuprous formate, for example, to the substrate, and applying energy to the monovalent carboxylate, an effective wiring layer such as a Cu film is obtained.
- a metal film can be obtained with high step coverage.
- a particularly good step is achieved by using a technique in which a monovalent carboxylic acid metal salt is deposited on a substrate and then a metal film is formed by applying energy to the monovalent carboxylic acid metal salt on the substrate.
- the organic ligand to the metal atom in the divalent carboxylic acid metal salt as the raw material is exhausted as a gas that does not affect the metal film (Cu film) by thermal decomposition, so the impurities in the film are very A few and extremely good quality films can be obtained.
- Divalent carboxylic acid metal salts are extremely cheaper than existing Cu-CVD raw material organic compounds, and have the advantage of lowering raw material costs.
- the divalent carboxylic acid metal salt is reacted with the metal constituting the carboxylic acid or the metal salt to produce a monovalent carboxylic acid metal salt gas
- the amount of the produced monovalent carboxylic acid metal salt can be easily obtained. Can be adjusted to.
- the raw material can be supplied in a stable and adjustable manner, and the deterioration of the raw material is less than the conventional method of heating the powdery cupric formate to obtain the cuprous formate gas. .
- the schematic diagram for demonstrating an example of the film-forming method which concerns on the 1st Embodiment of this invention The schematic diagram for demonstrating the other example of the film-forming method which concerns on the 1st Embodiment of this invention.
- the schematic diagram for demonstrating an example of the film-forming method which concerns on the 2nd Embodiment of this invention The schematic diagram for demonstrating the other example of the film-forming method which concerns on the 2nd Embodiment of this invention.
- Sectional drawing which shows schematic structure of an example of the film-forming apparatus for enforcing the method which concerns on the 1st Embodiment of this invention.
- Sectional drawing which shows schematic structure of the other example of the film-forming apparatus for enforcing the method concerning the 1st Embodiment of this invention.
- Sectional drawing which shows schematic structure of the further another example of the film-forming apparatus for enforcing the method concerning the 1st Embodiment of this invention.
- Sectional drawing which shows schematic structure of an example of the film-forming apparatus for enforcing the method concerning the 2nd Embodiment of this invention.
- the top view which shows schematic structure of the multi-chamber system for enforcing the method of this invention.
- Sectional drawing which shows the annealing unit used for the system of FIG.
- FIG. 1 is a schematic diagram for explaining the concept of the film forming method according to the first embodiment of the present invention.
- a divalent carboxylic acid metal salt containing a metal of a metal film to be obtained is reacted with a carboxylic acid to generate a monovalent carboxylic acid metal salt gas.
- a powdered divalent carboxylic acid metal salt is typically heated, and a gaseous or liquid carboxylic acid is supplied thereto to react with the divalent carboxylic acid.
- the metal salt is reduced to produce a monovalent carboxylic acid metal salt.
- the divalent carboxylic acid metal salt usually has water of crystallization, and when the metal is M, it can be expressed as M (II) (R—COO) 2 (H 2 O) n, and this can be expressed as carboxylic acid (R When —COOH) is supplied and heated, a monovalent carboxylic acid metal salt represented by M (I) (R—COO) can be obtained by a reduction reaction.
- the amount of the monovalent carboxylic acid metal salt produced can be adjusted by adjusting the amount of the carboxylic acid to be supplied, and the raw material can be stably supplied with good controllability.
- the water of crystallization may be removed by heating, or may be reacted without removing the water of crystallization.
- carboxylic acid those having a high vapor pressure and suitable for vaporization and reaction are preferable, and as such, formic acid (HCOOH), acetic acid (CH 3 COOH), propionic acid (CH 3 CH 2 COOH), Examples thereof include valeric acid (CH 3 (CH 2 ) 3 COOH) and butyric acid (CH 3 (CH 2 ) 2 COOH), and it is preferable to use those selected.
- formic acid having the highest vapor pressure is preferable.
- formic acid is considered to have only a portion other than the carboxyl group containing only H, and the amount of the intermediate decomposition product taken in as a by-product is minimal.
- the carboxylic acid constituting the divalent carboxylic acid metal salt is preferably selected from formic acid, acetic acid, propionic acid, valeric acid, and butyric acid.
- the carboxylic acid constituting the divalent carboxylic acid metal salt and the carboxylic acid supplied thereto may be the same or different, but are preferably the same.
- copper (Cu) is preferably applied, and silver (Ag), nickel (Ni), and cobalt (Co) can also be used. These can form a monovalent carboxylic acid metal salt that is easily thermally decomposed, and have low copper (Cu) and silver (Ag) resistance, and copper (Cu) has been attracting attention as a wiring material.
- Nickel (Ni) and cobalt (Co) are used as an electrode of a semiconductor device transistor part, a contact material to a source / drain part, and a semiconductor memory capacitor electrode.
- the monovalent carboxylic acid metal salt gas generated as described above is supplied onto the substrate 1.
- a monovalent carboxylic acid metal salt that is more easily thermally decomposed it can be easily decomposed into a metal by applying energy.
- a carboxylic acid having a high vapor pressure as described above it can be easily decomposed by heat, and a metal film can be easily formed.
- the monovalent carboxylic acid metal salt is easily decomposed into a metal, and in the present invention, a metal film is formed by utilizing the property.
- cupric formate as the divalent carboxylic acid metal salt and using formic acid as the carboxylic acid, it produces unstable cuprous formate that is known to be easily decomposed into copper. Therefore, it is possible to easily form a copper film using such properties.
- cuprous formate exists as a gas in a vacuum, it is easily oxidized in the atmosphere to become cuprous oxide. Therefore, the cuprous formate is supplied in a vacuum. At this time, the cuprous formate is brought to a temperature of about 50 to 150 ° C. so as to be kept in a gaseous state.
- copper monoformate contains not only a monomer but a multimer.
- the partial pressure of the formic acid gas during the first copper formate formation reaction is preferably about 133 to 6650 Pa (1 to 50 Torr).
- a monovalent carboxylic acid metal salt is adsorbed on the substrate 1 and deposited in a predetermined amount to form a monovalent carboxylic acid metal salt film 2 as a precursor of the metal film.
- the temperature of the substrate 1 is preferably about ⁇ 30 to 50 ° C.
- heat energy is used as energy. Since the heat energy can be applied by a resistance heating element, a heating lamp, or the like used in a normal film forming apparatus, the application is easy.
- a normal monovalent carboxylic acid metal salt which is a raw material gas
- a metal film is adsorbed on the substrate surface without thermal decomposition in the gas phase, and then given energy to form a metal film.
- step coverage can be improved. Therefore, it can be applied to a fine pattern in the ULSI wiring process.
- film formation for metal wiring can be performed at low cost.
- a monovalent carboxylic acid metal salt is produced from a divalent carboxylic acid metal salt and a carboxylic acid as in (a) of FIG. 1, and then, as shown in (b), the substrate 1
- the produced monovalent carboxylic acid metal salt gas may be supplied onto the substrate 1 in a state where energy such as thermal energy is applied to the substrate 1.
- energy such as thermal energy
- the step coverage tends to be slightly inferior to the method of FIG. 1, but the metal film is formed by adsorbing the monovalent metal carboxylate as shown in FIG. There is an advantage that the metal film can be formed in a shorter time than the case where the film is formed.
- FIG. 3 is a schematic view for explaining the concept of the film forming method according to the second embodiment of the present invention.
- a divalent carboxylic acid metal salt containing a metal of the metal film to be obtained is reacted with a metal constituting the metal salt to obtain a monovalent carboxylic acid metal.
- Generate salt gas Specifically, for example, typically, a powdered divalent carboxylic acid metal salt and a metal constituting the metal salt are allowed to coexist and heated to react with each other, thereby reacting the divalent carboxylic acid.
- the acid metal salt is reduced to produce a monovalent carboxylic acid metal salt.
- Divalent carboxylic acid metal salts usually have water of crystallization.
- the metal is M, it can be expressed as M (II) (R—COO) 2 (H 2 O) n, and this and the metal M coexist.
- a monovalent carboxylic acid metal salt represented by M (I) (R—COO) can be obtained by a reduction reaction.
- the amount of the monovalent carboxylic acid metal salt produced can be adjusted by adjusting the ratio of the divalent carboxylic acid metal salt to the metal, the supply amount of the carrier gas, and the like.
- the raw material can be stably supplied with good controllability.
- the crystal water may be removed by heating before reacting the metal salt of the divalent carboxylic acid with the metal, or the reaction may be performed without removing the crystal water.
- carboxylic acid constituting the divalent carboxylic acid metal salt it is preferable to use one selected from formic acid, acetic acid, propionic acid, valeric acid and butyric acid as in the first embodiment.
- Cu copper
- the monovalent carboxylic acid metal salt gas generated as described above is supplied onto the substrate 1.
- a monovalent carboxylic acid metal salt that is more easily thermally decomposed it can be easily decomposed into a metal by applying energy.
- copper diformate is used as a divalent carboxylic acid metal salt and this is reacted with copper, which is an unstable substance and easily decomposed into copper, as in the first embodiment. Since the produced copper formate can be produced, a copper film can be easily formed using such properties.
- the cuprous formate is easily oxidized in the atmosphere to become cuprous oxide, the cuprous formate is supplied in a vacuum. At this time, the cuprous formate is brought to a temperature of about 50 to 150 ° C. so as to be kept in a gaseous state.
- the partial pressure of the formic acid gas during the first copper formate formation reaction is preferably about 133 to 6650 Pa (1 to 50 Torr).
- a monovalent carboxylic acid metal salt is adsorbed on the substrate 1 and deposited in a predetermined amount to form a monovalent carboxylic acid metal salt film 2 as a precursor of the metal film.
- the temperature of the substrate 1 is preferably about ⁇ 30 to 50 ° C.
- thermo energy is typically used as in the first embodiment. Since the heat energy can be applied by a resistance heating element, a heating lamp, or the like used in a normal film forming apparatus, the application is easy.
- a normal monovalent carboxylic acid metal salt which is a raw material gas
- a metal film is adsorbed on the substrate surface without thermal decomposition in the gas phase, and then given energy to form a metal film.
- step coverage can be improved. Therefore, it can be applied to a fine pattern in the ULSI wiring process.
- film formation for metal wiring can be performed at low cost.
- the carboxylate is adsorbed on the surface of the substrate and then given energy to form a metal film, but it can also be as shown in FIG. 4.
- a monovalent carboxylic acid metal salt is produced from a divalent carboxylic acid metal salt and a metal.
- the generated monovalent carboxylic acid metal salt gas may be supplied onto the substrate 1 in a state where energy such as thermal energy is applied.
- the carboxylic acid metal salt gas reaches the substrate 1, it is immediately decomposed and the metal film 3 is formed.
- the step coverage tends to be slightly inferior to the method of FIG. 3, but the metal film is formed by adsorbing the monovalent carboxylic acid metal salt as shown in FIG. There is an advantage that the metal film can be formed in a shorter time than the case where the film is formed.
- FIG. 5 is a cross-sectional view showing a schematic configuration of an example of a film forming apparatus for performing the method according to the first embodiment of the present invention.
- the film forming apparatus shown in FIG. 5 has a chamber 11 formed into a cylindrical shape or a box shape with aluminum or the like, for example, and inside the chamber 11 is a semiconductor wafer (hereinafter simply referred to as a wafer) to be processed.
- a susceptor 12 for horizontally supporting W is arranged in a state where it is supported by a cylindrical support member 13 provided at the lower center of the susceptor 12.
- a heater 14 is embedded in the susceptor 12, and the heater 14 is heated by a heater power supply 15 to heat the wafer W as a substrate to be processed to a predetermined temperature.
- the susceptor 12 can be made of ceramics such as AlN.
- a shower head 20 is formed on the top wall 11 a of the chamber 11.
- the shower head 20 includes a flat gas diffusion space 21 formed in the top wall 11a of the chamber 11 and extending horizontally, and a shower plate 22 having a large number of gas discharge holes 23 provided below the gas diffusion space 21. is doing.
- a heater 20 a is provided on the inner surface of the shower head 20.
- An exhaust port 24 is formed in the lower portion of the side wall of the chamber 11, and an exhaust pipe 25 is connected to the exhaust port 24.
- An exhaust device 26 having a vacuum pump is connected to the exhaust pipe 25. By operating the exhaust device 26, the inside of the chamber 11 is depressurized to a predetermined degree of vacuum via the exhaust pipe 25.
- a loading / unloading port 27 for loading / unloading the wafer W and a gate valve 28 for opening / closing the loading / unloading port 27 are provided on the side wall of the chamber 11, a loading / unloading port 27 for loading / unloading the wafer W and a gate valve 28 for opening / closing the loading / unloading port 27 are provided.
- a formic acid storage container 31 for storing formic acid (HCOOH) is disposed outside the chamber 11, and a pipe 32 extends from the formic acid storage container 31.
- the pipe 32 is provided with a valve 33 and a mass flow controller (MFC) 34 for flow rate control.
- MFC mass flow controller
- a reaction vessel 35 that stores the copper formate powder 36 is disposed, and the pipe 32 is inserted into the reaction vessel 35.
- a heater 35 a is provided around the reaction vessel 35.
- a pipe 37 is connected to the upper part of the reaction vessel 35, and this pipe 37 extends from above the chamber 11 to a position facing the gas diffusion space 21 inside the shower head 20.
- a heater 37 a is provided around the pipe 37.
- a gas line 16a for purging the pipe 32 with an inert gas is connected to the downstream side of the mass flow controller (MFC) 34 of the pipe 32.
- the gas line 16a is provided with a valve 17a and a mass flow controller (MFC) 18a from the upstream side.
- a gas line 16 b for supplying by-product purge and dilution gas is connected in the gas diffusion space 21 of the shower head 20.
- the gas line 16b is provided with a valve 17b and a mass flow controller (MFC) 18b from the upstream side.
- the formic acid in the formic acid storage container 31 is made into a gaseous state by appropriate means such as heating or bubbling, and this formic acid gas is introduced into the reaction container 35 through the pipe 32.
- a purge gas is supplied into the reaction vessel 35 through the gas line 16 a while heating the reaction vessel 35 to about 50 to 150 ° C. by the heater 35 a, and the second formic acid is supplied. Copper formate water is removed, and then the formic acid gas is reacted with the formic acid gas in the state where the reaction vessel 35 is maintained at 100 to 250 ° C. by the heater 35a. According to the formula (3), copper formate gas is generated.
- the formic acid gas may be supplied to the reaction vessel 35 without removing the crystal water of the cupric formate.
- liquid formic acid may be supplied to the vaporizer and gasified there, or formic acid may be supplied to the reaction chamber in a liquid state to cause the above reaction.
- Each component constituting the film forming apparatus is connected to and controlled by a process controller 80 having a microprocessor (computer). Also connected to the process controller 80 is a user interface 81 including a keyboard for an operator to input commands for managing the film forming apparatus, a display for visualizing and displaying the operating status of the film forming apparatus, and the like. ing. Further, the process controller 80 causes each component of the film forming apparatus to execute processing according to a control program for realizing various processes executed by the film forming apparatus under the control of the process controller 80 and processing conditions.
- a storage unit 82 that stores a program for storing the recipe is connected. The recipe is stored in a storage medium.
- the storage medium may be a fixed one such as a hard disk or a portable one such as a CDROM or DVD.
- the gate valve 28 is opened, and the wafer W is loaded into the chamber 11 from the loading / unloading port 27 and placed on the susceptor 12.
- the exhaust port 24 and the exhaust pipe 25 By exhausting the chamber 11 through the exhaust port 24 and the exhaust pipe 25 by the exhaust device 26, the inside of the chamber 11 is brought to a predetermined pressure.
- the valve 33 is opened and the formic acid gas adjusted to a predetermined flow rate by the mass flow controller (MFC) 34 is supplied to the reaction vessel through the pipe 32.
- MFC mass flow controller
- the reaction vessel 35 is heated to about 50 to 150 ° C. by the heater 35a, whereby the copper dioxide powder 36 in the reaction vessel 35 reacts with the formic acid gas according to the above-described formula (3) to produce the first copper formate gas. Is generated.
- the first copper formate gas reaches the gas diffusion space 21 of the shower head 20 through the pipe 37 and is discharged toward the wafer W from a number of gas discharge holes 23 formed in the shower plate 22.
- the first copper formate gas is maintained at 50 to 150 ° C. by the heater 37 a provided on the outer periphery of the pipe 37 and the heater 20 a provided on the inner surface of the shower head 20. Supplied.
- the copper formate gas is adsorbed on the wafer W held at a temperature of room temperature to about 50 ° C. to form a first copper formate film as a precursor.
- the film thickness of the first copper formate film at this time can be controlled by the supply time of the first copper formate gas and the wafer temperature.
- the film formation of the first copper formate as the precursor is performed for a predetermined time, and when the predetermined thickness is reached, the supply of the first copper formate gas is stopped, and then the wafer W is moved to 100 by the heater 14.
- the copper formate is decomposed according to the reaction formula shown in the above formula (2) by the heat energy at that time, and a copper film having a predetermined thickness is formed.
- the output of the heater 14 is stopped, the gas lines are switched to the purge gas lines 16a and 16b, and the by-product gas and excess formic acid gas are purged with an inert gas such as N 2 or Ar.
- an inert gas such as N 2 or Ar.
- a good quality Cu film with good step coverage can be formed at low cost.
- formic acid gas is introduced into the reaction vessel 35 to generate a first copper formate gas, and the first copper formate gas thus generated is guided into the chamber to adsorb the first copper formate to the wafer W; Thereafter, a copper film can be formed by an extremely simple method such as heating.
- the wafer W is heated to 100 to 250 ° C. by the heater 14 while being heated in the reaction vessel 35.
- the generated copper formate gas may be discharged toward the wafer W by the shower head 20.
- FIG. 6 is a cross-sectional view showing a schematic configuration of another example of a film forming apparatus for performing the method according to the first embodiment of the present invention.
- This film forming apparatus is different from the apparatus in FIG. 5 in the mechanism for heating the wafer on the susceptor and the exhaust path, and the other configurations are basically the same as those in the apparatus in FIG. The description is omitted.
- a susceptor 12 ′ having no heater is provided instead of the susceptor 12, and a lamp heating unit 50 is provided below the susceptor 12 ′.
- the lamp heating unit 50 is configured by arranging a plurality of lamp heaters 51 made of ultraviolet lamps and providing a transmission window 52 made of a heat ray transmitting material such as quartz on the lamp heater 51.
- the susceptor 12 ' is placed thereon.
- an exhaust port 53 is opened at a height position corresponding to the susceptor 12 ′ on the side wall of the chamber 11.
- the side wall of the chamber 11 extends horizontally from the exhaust port 53 and extends downward in the middle to reach the bottom surface of the chamber 11.
- An open exhaust passage 54 is formed, and an exhaust pipe 55 is connected to the exhaust passage 54.
- An exhaust device 56 having a vacuum pump is connected to the exhaust pipe 55. Then, by operating the exhaust device 56, the inside of the chamber 11 is depressurized to a predetermined degree of vacuum via the exhaust path 54 and the exhaust pipe 55.
- a wafer W is loaded and placed on the susceptor 12 'basically in the same manner as in the apparatus shown in FIG. (MFC) 34 formic acid adjusted to a predetermined flow rate is introduced into reaction vessel 35 via pipe 32, and the inside of reaction vessel 35 is maintained at 50 to 150 ° C. by heater 35a, and the second copper formate powder therein 36 and formic acid gas are reacted to produce a first copper formate gas.
- the first copper formate gas reaches the shower head 20 via the pipe 37 and is discharged toward the wafer W from the discharge hole 23.
- the first copper formate gas is maintained at 50 to 150 ° C.
- the first copper formate gas discharged from the shower head 20 is adsorbed on the wafer W to form a solid first copper formate film as a precursor.
- the wafer on which the copper formate film having a desired thickness is formed is heated to 100 to 250 ° C. by a lamp heater and heated, and the heat energy at that time is changed according to the reaction equation shown in the above equation (2).
- the copper monoformate is decomposed to form a copper film having a predetermined thickness.
- the apparatus of FIG. 6 heats the wafer W by the lamp heating unit 50, the heating rate after forming the first copper formate film is fast. Therefore, the reaction formula shown in the above formula (2) can be rapidly advanced, and in addition to the extremely simple technique, a copper film can be formed with high throughput.
- the wafer W is heated to 100 to 250 ° C. by the lamp heating unit 50,
- the copper formate gas generated in 35 may be discharged toward the wafer W by the shower head 20.
- the copper formate can be decomposed according to the reaction formula (2) described above to form a copper film having a predetermined thickness on the wafer W. For this reason, it becomes possible to further shorten the film formation time of the copper film.
- FIG. 7 is a cross-sectional view showing a schematic configuration of still another example of a film forming apparatus for performing the method according to the first embodiment of the present invention.
- the film forming apparatus shown in FIG. 7 is different from the film forming apparatus shown in FIG. 5 in that a lamp heating unit 50 is provided in the upper part of the chamber 11 instead of providing a heater in the susceptor 12, and An introduction port 71 is provided, and a heater 71a is provided on the inner surface thereof.
- the other configurations are basically the same as those in FIG. 5, and the same components as those in FIG.
- the wafer W is loaded into the chamber 11 and placed on the susceptor 12 as in the film forming apparatus of FIG.
- the formic acid gas adjusted to a predetermined flow rate by the mass flow controller (MFC) 34 is guided to the reaction vessel 35 through the pipe 32.
- the reaction vessel 35 is heated to about 50 to 150 ° C. by the heater 35a, whereby the second copper formate powder 36 and the formic acid gas in the reaction vessel 35 react with each other in accordance with the above-described reaction formula (3).
- Produce copper formate gas The first copper formate gas is introduced into the chamber 11 through the pipe 37 and the gas inlet 71. At this time, the copper formate gas is maintained at 50 to 150 ° C.
- a solid copper formate film having a predetermined thickness is formed by supplying the cuprous formate gas for a predetermined time.
- the wafer W is heated by the lamp heating unit 50, and the copper formate is decomposed according to the reaction of the reaction formula shown in the equation (2) by the heat energy at that time, thereby forming a copper film having a predetermined thickness.
- the cuprous formate is decomposed by the lamp heating from above, so that the lamp heating unit is connected to the susceptor.
- the wafer W can be heated more quickly than the apparatus of FIG. 6 provided below 12, and the throughput can be further improved. Since no heating mechanism is provided in the susceptor 12, a cooling mechanism can be provided. Since the adsorption amount of the first copper formate gas on the surface of the wafer W is larger as the temperature is lower, this method is more advantageous than the apparatus shown in FIGS.
- the wafer W is placed on the susceptor 12 and the inside of the chamber 11 is adjusted to a predetermined pressure, and then the wafer W is heated to 100 to 250 ° C. by the lamp heating unit 50,
- the copper formate gas generated in the inside may be supplied from the gas introduction port 71 toward the wafer W.
- the copper formate can be decomposed according to the reaction formula (2) described above to form a copper film having a predetermined thickness on the wafer W. For this reason, it becomes possible to shorten the film-forming time of a copper film.
- FIG. 8 is a cross-sectional view showing a schematic configuration of an example of a film forming apparatus for performing the method according to the second embodiment of the present invention.
- This film forming apparatus differs from the apparatus shown in FIG. 5 in that the raw material charged into the reaction vessel 35 is different from the apparatus shown in FIG. 5 and is not provided with a formic acid supply mechanism. Since the configuration is basically the same as that of the apparatus shown in FIG. 5, the same members are denoted by the same reference numerals and the description thereof is omitted.
- a mixed powder 61 of second copper formate powder and copper powder is stored in a reaction vessel 35.
- Purge gas is supplied into the reaction vessel 35 through the gas line 16a to remove the crystal water of the cupric formate powder, and then the reaction vessel 35 is kept at about 150 to 250 ° C. by the heater 35a, whereby the second formic acid
- the copper powder and the copper powder react to produce a cuprous formate gas according to the following formula (4).
- Cu (II) (HCOO) 2 + Cu ⁇ 2Cu (I) (HCOO) (4) In addition, you may make it raise to the temperature which such a reaction produces, without removing the crystal water of cupric formate.
- the wafer W is loaded and placed on the susceptor 12 basically as in the apparatus of FIG. 5, and the inside of the chamber 11 is maintained at a predetermined pressure.
- the inside of the reaction vessel 35 is heated to about 150 to 250 ° C. by the heater 35a, and the cupric formate powder of the mixed powder 61 therein And copper powder are reacted according to the above-described formula (4) to produce a copper formate gas.
- the first copper formate gas reaches the gas diffusion space 21 of the shower head 20 through the pipe 37 and is discharged toward the wafer W from a number of gas discharge holes 23 formed in the shower plate 22.
- the first copper formate gas is maintained at 50 to 150 ° C. by the heater 37 a provided on the outer periphery of the pipe 37 and the heater 20 a provided on the inner surface of the shower head 20. Supplied.
- the copper formate gas is adsorbed on the wafer W held at a temperature of room temperature to about 50 ° C. to form a first copper formate film as a precursor.
- the film thickness of the first copper formate film at this time can be controlled by the supply time of the first copper formate gas and the wafer temperature.
- the film formation of the first copper formate as the precursor is performed for a predetermined time, and when the predetermined thickness is reached, the supply of the first copper formate gas is stopped, and then the wafer W is moved to 100 by the heater 14.
- the copper formate is decomposed according to the reaction formula shown in the above formula (2) by the heat energy at that time, and a copper film having a predetermined thickness is formed.
- the output of the heater 14 is stopped, and the by-product gas and the like are purged by supplying an inert gas such as N 2 or Ar not only from the purge gas line 16a but also from the purge gas line 16b.
- an inert gas such as N 2 or Ar not only from the purge gas line 16a but also from the purge gas line 16b.
- a good quality Cu film with good step coverage can be formed at low cost.
- the second copper formate and copper are reacted in the reaction vessel 35 to generate a first copper formate gas, and the first copper formate gas generated in this way is introduced into the chamber to the wafer W for the first time.
- a copper film can be formed by an extremely simple method of adsorbing copper formate and then heating.
- the wafer W is heated to 100 to 250 ° C. by the heater 14 while being heated in the reaction vessel 35.
- the generated copper formate gas may be discharged toward the wafer W by the shower head 20.
- the configuration of the apparatus of FIG. 6 or the apparatus of FIG. 7 can be applied to the apparatus of FIG.
- FIG. 9 is a plan view showing a schematic structure of a multi-chamber system in which chambers for performing these steps are clustered.
- an adsorption processing unit 101 that adsorbs copper first formate on the wafer W and a thermal energy is applied to the first copper formate adsorbed on the wafer W by annealing the wafer W to form a copper film.
- An annealing unit 102 and a cooling unit 103 for cooling the annealed wafer W are provided, and these are provided corresponding to the three sides of the heptagonal wafer transfer chamber 104.
- Load lock chambers 105 and 106 are provided on the other two sides of the wafer transfer chamber 104, respectively.
- a wafer loading / unloading chamber 108 is provided on the opposite side of the load lock chambers 105 and 106 from the wafer transfer chamber 104, and a wafer W can be accommodated on the opposite side of the wafer loading / unloading chamber 108 to the load lock chambers 105 and 106.
- Ports 109, 110, and 111 for attaching three carriers C are provided.
- the adsorption processing unit 101, the annealing unit 102, the cooling unit 103, and the load lock chambers 105 and 106 are connected to each side of the wafer transfer chamber 104 via a gate valve G as shown in FIG. Opening the gate valve G communicates with the wafer transfer chamber 104, and closing the corresponding gate valve G blocks the wafer transfer chamber 104.
- a gate valve G is also provided at a portion of the load lock chambers 105 and 106 connected to the wafer loading / unloading chamber 108, and the load lock chambers 105 and 106 open the corresponding gate valves G by opening the corresponding gate valves G. When the corresponding gate valve G is closed, the wafer loading / unloading chamber 108 is shut off.
- a wafer transfer device 112 that loads and unloads the wafer W with respect to the adsorption processing unit 101, the annealing unit 102, the cooling unit 103, and the load lock chambers 105 and 106 is provided.
- the wafer transfer device 112 is disposed substantially at the center of the wafer transfer chamber 104, and has two blades 114a and 114b that hold the wafer W at the tip of a rotatable / extensible / retractable portion 113 that can rotate and expand / contract. These two blades 114a and 114b are attached to the rotating / extending / contracting portion 113 so as to face opposite directions.
- the inside of the wafer transfer chamber 104 is maintained at a predetermined degree of vacuum.
- the three ports 109, 110, and 111 for attaching the carrier C in the wafer loading / unloading chamber 108 are provided with shutters (not shown), respectively, so that the wafer C containing the wafer W or an empty carrier C can be directly attached to these ports. It has become.
- An alignment chamber 115 is provided on the side surface of the wafer loading / unloading chamber 108, where the wafer W is aligned.
- a wafer transfer device 116 for loading / unloading the wafer W into / from the carrier C and loading / unloading the wafer W into / from the load lock chambers 105 and 106 is provided.
- the wafer transfer device 116 has an articulated arm structure and can run on the rail 118 along the arrangement direction of the carrier C.
- the wafer W is placed on the hand 117 at the tip thereof and transferred. I do.
- Control of the entire system, such as operations of the wafer transfer apparatuses 112 and 116, is performed by the control unit 119.
- the control unit 119 has the functions of the process controller 80, the user interface 81, and the storage unit 82.
- adsorption processing unit 101 a unit basically having a configuration excluding the heating means from the apparatus of FIGS. 5 and 8 can be used.
- the annealing unit 102 may be any unit that can heat the wafer W, but the unit shown in FIG. 10 can be used preferably.
- the annealing unit 102 has a flat chamber 121, and a susceptor 122 on which the wafer W on which the first copper formate film 200 is formed is placed at the bottom of the chamber 121.
- the top wall portion of the chamber 121 has a lamp heating unit 130 composed of a lamp heater 131 composed of a plurality of ultraviolet lamps and a transmission window 132 so that heat rays are irradiated downward with the transmission window 132 facing down. Is arranged.
- a gas inlet 141 is provided on the side wall of the chamber 121, and a gas inlet pipe 142 is connected to the gas inlet 141.
- a gas supply mechanism 143 that supplies an inert gas such as N 2 gas, Ar gas, or He gas is connected to the gas introduction pipe 142.
- An exhaust port 144 is formed on the side wall of the chamber 121 opposite to the gas inlet 141, and an exhaust pipe 145 is connected to the exhaust port 144.
- An exhaust device 146 having a vacuum pump is connected to the exhaust pipe 145. By operating the exhaust device 146, the inside of the chamber 121 is depressurized to a predetermined degree of vacuum via the exhaust pipe 145.
- this unit is a module dedicated to annealing, the degree of freedom of processing is high, and for example, it is easy to reduce the carbon and oxygen in the film by annealing at a temperature higher than the Cu film forming wafer temperature.
- the cooling unit 103 has a simple configuration in which a cooling stage having a refrigerant flow path is arranged in the chamber, and is for cooling the wafer W that has been heated to a high temperature by annealing.
- the wafer W is taken out from one of the carriers C by the wafer transfer device 116 and loaded into the load lock chamber 105, and is transferred from the load lock chamber 105 to the transfer chamber 104 by the wafer transfer device 112. .
- the wafer W is transported to the adsorption processing unit 101 and the first copper formate adsorption process is performed.
- the wafer W on which the first copper formate film having a predetermined thickness is formed in the adsorption processing unit 101 is taken out from the adsorption processing unit 101 by the wafer transfer device 112 and subsequently carried into the annealing unit 102.
- the cuprous oxide film is decomposed by lamp heating to form a copper film.
- the wafer W on which the copper film is formed is taken out from the annealing unit 102 by the wafer transfer device 112 and subsequently carried into the cooling unit 103.
- the cooling unit 103 cools the wafer W to a predetermined temperature on the wafer stage.
- the wafer W cooled by the cooling unit 103 is transferred to the load lock chamber 106 by the wafer transfer device 112, and is carried into the predetermined carrier C from the load lock chamber 106 by the wafer transfer device 116.
- Such a series of processing is continuously performed on the number of wafers W accommodated in the carrier C.
- each process is performed by different devices, and by clustering them, the processing can be dedicated to each device (unit), and throughput can be increased compared to performing all the steps with one device. Can be improved.
- the present invention is not limited to the above-described embodiment, and various modifications can be made.
- the means for producing copper formate and the means for heating the first copper formate film are merely examples, and any other means may be used.
- copper formate is produced using copper formate and formic acid or copper formate and copper, and supplying this to the substrate and applying energy to decompose it to form a Cu film.
- the metal film is generated by decomposing the metal, it is not limited to the Cu film.
- the production temperature and pressure of the monovalent carboxylic acid metal salt may be different from the decomposition temperature of the monovalent carboxylic acid metal salt.
- the semiconductor wafer was used as a board
- FPD flat panel displays
- the method for forming a copper film according to the present invention is suitable as a Cu wiring of a semiconductor device because a good film can be obtained at a low cost with good step coverage.
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Abstract
Description
2Cu(OCHO)2 → 2Cu(OCHO)+CO+CO2+H2O……(1)
第一蟻酸銅は、非特許文献3に報告されているように、非常に熱分解しやすい物質であるため、低温で以下の(2)式に示す反応式により第一蟻酸銅から容易にCu薄膜が成膜される。
2Cu(OCHO) → 2Cu+2CO2+H2……(2)
この方法によれば、配位子であるフォルメート基(OCHO)はCO2やH2に熱分解して排気されやすいためにCu膜中に取り込まれ難い。そのため不純物を含まない、高純度のCu膜が生成されやすい。しかし、一般に固体原料から気化させたものをキャリアガスで運ぶ方法は、減圧下での固体原料容器内部の熱伝導状態に大きく影響され、安定した供給が難しい。また、固体原料容器内部で原料の第二蟻酸銅が熱分解してしまい、そこでCuが成膜されてしまう。つまり、原料の劣化が起こりやすい。
また、他の目的は、このような方法を実行させるプログラムが記憶された記憶媒体を提供することにある。
まず、本発明の第1の実施形態に係る成膜方法について説明する。図1は、本発明の第1の実施形態に係る成膜方法の概念を説明するための模式図である。
まず、上記第1の実施形態の具体例について説明する。ここでは、2価のカルボン酸金属塩とカルボン酸から1価のカルボン酸金属塩を形成する典型例として、第二蟻酸銅と蟻酸とを用いて第一蟻酸銅を形成する例を挙げ、これを基板としての半導体ウエハに供給し、エネルギーを与えて金属膜として銅膜を形成する場合について説明する。
図5に示す成膜装置は、例えばアルミニウムなどにより円筒状あるいは箱状に成形されたチャンバ11を有しており、チャンバ11の内部には、被処理体である半導体ウエハ(以下、単にウエハと記す)Wを水平に支持するためのサセプタ12がその中央下部に設けられた円筒状の支持部材13により支持された状態で配置されている。サセプタ12にはヒーター14が埋め込まれており、このヒーター14はヒーター電源15から給電されることにより被処理基板であるウエハWを所定の温度に加熱する。なお、サセプタ12はセラミックス例えばAlNで構成することができる。
2Cu(II)(HCOO)2+HCOOH→2Cu(I)(HCOO)+2H2+3CO2…(3)
なお、第二蟻酸銅の結晶水を除去せずに、反応容器35へ蟻酸ガスを供給するようにしてもよい。また、蟻酸の供給に関しては、液体状の蟻酸を気化器に供給し、そこでガス状にしてもよいし、蟻酸を液体状のまま反応室に供給して上記反応を生じさせることもできる。
まず、ゲートバルブ28を開にして、ウエハWを搬入出口27からチャンバ11内に搬入し、サセプタ12上に載置する。排気装置26により排気口24および排気管25を介してチャンバ11内を排気することによりチャンバ11内を所定の圧力にする。
この成膜装置は、サセプタ上のウエハを加熱する機構および排気経路が図5の装置と異なっており、その他の構成は基本的に図5の装置と同じであるので、同じ部材については同じ符号を付して説明を省略する。
この成膜装置は、反応容器35内に装入される原料が図5の装置と異なっており、また、蟻酸の供給機構が設けられていない点が図5の装置と異なっているが、その他の構成は基本的に図5の装置と同じであるので、同じ部材については同じ符号を付して説明を省略する。
Cu(II)(HCOO)2+Cu→2Cu(I)(HCOO)…(4)
なお、第二蟻酸銅の結晶水を除去せずに、このような反応が生じる温度に上昇させるようにしてもよい。
Claims (36)
- 2価のカルボン酸金属塩とカルボン酸とを反応させて1価のカルボン酸金属塩ガスを生成することと、
基板上に前記1価のカルボン酸金属塩ガスを供給することと、
基板にエネルギーを与え、基板上に供給された前記金属のカルボン酸塩を分解して金属膜を形成することと
を有する、成膜方法。 - 前記2価のカルボン酸金属塩は粉末状であり、これにカルボン酸ガスまたは液体状のカルボン酸を供給することにより1価のカルボン酸金属塩ガスを得る請求項1に記載の成膜方法。
- 2価のカルボン酸金属塩とカルボン酸とを反応させる際に加熱する、請求項1に記載の成膜方法。
- 前記基板は真空に保持された処理容器内に配置され、前記2価のカルボン酸金属塩とカルボン酸とが反応して生成された1価のカルボン酸金属塩ガスを前記処理容器内に導入する、請求項1に記載の成膜方法。
- 基板上に前記1価のカルボン酸金属塩ガスを供給することにより基板上に前記カルボン酸塩を堆積させ、
前記1価のカルボン酸金属塩が堆積された基板にエネルギーを与えることにより基板上のカルボン酸塩を分解する、請求項1に記載の成膜方法。 - 基板上に前記1価のカルボン酸金属塩ガスを供給しながら、基板にエネルギーを与える、請求項1に記載の成膜方法。
- 前記金属は銅、銀、コバルト、ニッケルからなる群から選択されるものである、請求項1に記載の成膜方法。
- 前記カルボン酸は、蟻酸、酢酸、プロピオン酸、吉草酸、酪酸から選択されたものである、請求項1に記載の成膜方法。
- 前記2価のカルボン酸金属塩は第2蟻酸銅であり、前記カルボン酸は蟻酸であり、前記1価のカルボン酸金属塩ガスは第1蟻酸銅である、請求項1に記載の成膜方法。
- 2価のカルボン酸金属塩と当該金属とを反応させて1価のカルボン酸金属塩ガスを生成することと、
基板上に前記1価のカルボン酸金属塩ガスを供給することと、
基板にエネルギーを与え、基板上に供給された前記金属のカルボン酸塩を分解して金属膜を形成することと
を有する成膜方法。 - 2価のカルボン酸金属塩と当該金属とを共存させた状態で加熱することにより1価のカルボン酸金属塩ガスを得る、請求項10に記載の成膜方法。
- 前記基板は真空に保持された処理容器内に基板に配置され、前記2価のカルボン酸金属塩と当該金属とが反応して生成された1価のカルボン酸金属塩ガスを前記処理容器内に導入する、請求項10に記載の成膜方法。
- 基板上に前記1価のカルボン酸金属塩ガスを供給することにより基板上に前記カルボン酸塩を堆積させ、
前記カルボン酸塩が堆積された基板にエネルギーを与えることにより基板上のカルボン酸塩を分解する、請求項10に記載の成膜方法。 - 基板上に前記1価のカルボン酸金属塩ガスを供給しながら、基板にエネルギーを与える、請求項10に記載の成膜方法。
- 前記金属は銅、銀、コバルト、ニッケルからなる群から選択されるものである、請求項10に記載の成膜方法。
- 前記2価のカルボン酸金属塩を構成するカルボン酸は、蟻酸、酢酸、プロピオン酸、吉草酸、酪酸から選択されたものである、請求項10に記載の成膜方法。
- 前記2価のカルボン酸金属塩は第2蟻酸銅であり、前記1価のカルボン酸金属塩ガスは第1蟻酸銅である、請求項10に記載の成膜方法。
- 真空に保持され、基板が配置される処理容器と、
前記処理容器内で基板を支持する基板支持部材と、
2価のカルボン酸金属塩とカルボン酸とを反応させて1価のカルボン酸金属塩ガスを生成するガス生成機構と、
前記処理容器内の基板上に前記1価のカルボン酸金属塩ガスを供給するガス供給機構と、
前記基板支持部材上の基板にエネルギーを与えるエネルギー付与機構と、
前記処理容器内を排気する排気機構と
を具備し、
前記エネルギー付与機構によるエネルギーによって第1カルボン酸塩が分解して基板上に金属膜が形成される成膜装置。 - 前記ガス生成機構は、カルボン酸ガスを生成するカルボン酸ガス生成部と、前記2価のカルボン酸金属塩が配置され、前記カルボン酸ガス生成機構で生成されたカルボン酸と前記2価のカルボン酸金属塩との反応により1価のカルボン酸金属塩を生成する反応部と、前記1価のカルボン酸ガスを前記反応部に供給するカルボン酸ガス供給配管とを有し、前記ガス供給機構は、生成された1価のカルボン酸金属塩ガスを前記処理容器に導くカルボン酸金属塩導入部を有する、請求項18に記載の成膜装置。
- 前記反応部は、前記2価のカルボン酸金属塩粉末を貯留する反応容器を有する、請求項19に記載の成膜装置。
- 前記カルボン酸金属塩導入部は、前記1価のカルボン酸金属塩ガスをシャワー状に導くシャワーヘッドを有する、請求項19に記載の成膜装置。
- 前記ガス供給機構により基板上に前記1価のカルボン酸金属塩ガスが供給されて前記1価のカルボン酸金属塩が堆積し、前記エネルギー付与機構によるエネルギーによって基板上に堆積したカルボン酸塩が分解する、請求項18に記載の成膜装置。
- 前記ガス供給機構により基板上に前記1価のカルボン酸金属塩ガスが供給されながら、前記エネルギー付与機構により基板にエネルギーが付与される、請求項18に記載の成膜装置。
- 前記金属は銅、銀、コバルト、ニッケルからなる群から選択されるものである、請求項18に記載の成膜装置。
- 前記ガス生成手段で用いられるカルボン酸は、蟻酸、酢酸、プロピオン酸、吉草酸、酪酸から選択されたものである、請求項18に記載の成膜装置。
- 前記エネルギー付与機構は、前記基板に熱エネルギーを与える、請求項18に記載の成膜装置。
- 真空に保持され、基板が配置される処理容器と、
前記処理容器内で基板を支持する基板支持部材と、
2価のカルボン酸金属塩と当該金属とを反応させて1価のカルボン酸金属塩ガスを生成するガス生成機構と、
前記処理容器内の基板上に前記1価のカルボン酸金属塩ガスを供給するガス供給機構と、
前記基板支持部材上の基板にエネルギーを与えるエネルギー付与機構と、
前記処理容器内を排気する排気機構と
を具備し、
前記エネルギー付与機構によるエネルギーによって前記第1カルボン酸金属塩が分解して基板上に金属膜が形成される成膜装置。 - 前記ガス生成機構は、2価のカルボン酸金属塩と当該金属とが配置され、加熱によりこれらを反応させる反応部を有し、前記ガス供給機構は、生成された1価のカルボン酸金属塩ガスを前記処理容器に導くカルボン酸金属塩導入部を有する、請求項27に記載の成膜装置。
- 前記カルボン酸金属塩導入部は、前記1価のカルボン酸金属塩ガスをシャワー状に導くシャワーヘッドを有する、請求項28に記載の成膜装置。
- 前記ガス供給機構により基板上に前記1価のカルボン酸金属塩ガスが供給されて前記1価のカルボン酸金属塩が堆積し、前記エネルギー付与機構によるエネルギーによって基板上に堆積したカルボン酸塩が分解する、請求項27に記載の成膜装置。
- 前記ガス供給機構により基板上に前記1価のカルボン酸金属塩ガスが供給されながら、前記エネルギー付与機構により基板にエネルギーが付与される、請求項27に記載の成膜装置。
- 前記金属は銅、銀、コバルト、ニッケルからなる群から選択されるものである、請求項27に記載の成膜装置。
- 前記2価のカルボン酸金属塩を構成するカルボン酸は、蟻酸、酢酸、プロピオン酸、吉草酸、酪酸から選択されたものである、請求項27に記載の成膜装置。
- 前記エネルギー付与機構は、前記基板に熱エネルギーを与える、請求項27に記載の成膜装置。
- コンピュータ上で動作し、成膜装置を制御するためのプログラムが記憶された記憶媒体であって、
前記プログラムは、実行時に、
2価のカルボン酸金属塩とカルボン酸とを反応させて1価のカルボン酸金属塩ガスを生成することと、
基板上に前記1価のカルボン酸金属塩ガスを供給することと、
基板にエネルギーを与え、基板上に供給された前記金属のカルボン酸塩を分解して金属膜を形成することとを有する成膜方法が実施されるようにコンピュータに成膜装置を制御させる記憶媒体。 - コンピュータ上で動作し、成膜装置を制御するためのプログラムが記憶された記憶媒体であって、
前記プログラムは、実行時に、
2価のカルボン酸金属塩と当該金属とを反応させて1価のカルボン酸金属塩ガスを生成することと、
基板上に前記1価のカルボン酸金属塩ガスを供給することと、
基板にエネルギーを与え、基板上に供給された前記金属のカルボン酸塩を分解して金属膜を形成することとを有する成膜方法が実施されるようにコンピュータに成膜装置を制御させる記憶媒体。
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MARIE-JOSE MOUCHE ET AL.: "Metal-organic chemical vapor deposition of copper using hydrated copper formate as a new precursor", THIN SOLID FILMS, vol. 262, 1995, pages 1 - 6 * |
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CN101910459A (zh) | 2010-12-08 |
US8551565B2 (en) | 2013-10-08 |
US20100316799A1 (en) | 2010-12-16 |
KR20100072089A (ko) | 2010-06-29 |
KR101237634B1 (ko) | 2013-02-27 |
JP2009161814A (ja) | 2009-07-23 |
CN101910459B (zh) | 2012-06-20 |
JP5145052B2 (ja) | 2013-02-13 |
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