WO2022059170A1 - 半導体装置の製造方法、記録媒体及び基板処理装置 - Google Patents
半導体装置の製造方法、記録媒体及び基板処理装置 Download PDFInfo
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- WO2022059170A1 WO2022059170A1 PCT/JP2020/035478 JP2020035478W WO2022059170A1 WO 2022059170 A1 WO2022059170 A1 WO 2022059170A1 JP 2020035478 W JP2020035478 W JP 2020035478W WO 2022059170 A1 WO2022059170 A1 WO 2022059170A1
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- gas
- reducing gas
- substrate
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- 239000000758 substrate Substances 0.000 title claims abstract description 64
- 239000004065 semiconductor Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 230000001603 reducing effect Effects 0.000 claims abstract description 183
- 229910052751 metal Inorganic materials 0.000 claims abstract description 69
- 239000002184 metal Substances 0.000 claims abstract description 69
- 239000007789 gas Substances 0.000 claims description 414
- 238000000034 method Methods 0.000 claims description 62
- 230000008569 process Effects 0.000 claims description 31
- 239000000460 chlorine Substances 0.000 claims description 30
- 229910052801 chlorine Inorganic materials 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 230000009467 reduction Effects 0.000 claims description 8
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims description 6
- 239000011733 molybdenum Substances 0.000 claims description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- BQBYSLAFGRVJME-UHFFFAOYSA-L molybdenum(2+);dichloride Chemical compound Cl[Mo]Cl BQBYSLAFGRVJME-UHFFFAOYSA-L 0.000 claims description 2
- 229910000073 phosphorus hydride Inorganic materials 0.000 claims 3
- 235000012431 wafers Nutrition 0.000 description 68
- 239000010408 film Substances 0.000 description 46
- 239000011261 inert gas Substances 0.000 description 31
- 229910020818 PH 3 Inorganic materials 0.000 description 18
- 238000006243 chemical reaction Methods 0.000 description 18
- 230000004048 modification Effects 0.000 description 17
- 238000012986 modification Methods 0.000 description 17
- 238000003860 storage Methods 0.000 description 15
- 239000006227 byproduct Substances 0.000 description 12
- RLOWWWKZYUNIDI-UHFFFAOYSA-N phosphinic chloride Chemical compound ClP=O RLOWWWKZYUNIDI-UHFFFAOYSA-N 0.000 description 10
- 238000001179 sorption measurement Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000003779 heat-resistant material Substances 0.000 description 5
- 239000010453 quartz Substances 0.000 description 5
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000010926 purge Methods 0.000 description 4
- 229910010271 silicon carbide Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 2
- UORVGPXVDQYIDP-UHFFFAOYSA-N borane Chemical compound B UORVGPXVDQYIDP-UHFFFAOYSA-N 0.000 description 2
- 229910052805 deuterium Inorganic materials 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- -1 for example Substances 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ZEHJQFZMRFDWTH-UHFFFAOYSA-J 1k48qh7w29 Chemical compound Cl[Po](Cl)(Cl)Cl ZEHJQFZMRFDWTH-UHFFFAOYSA-J 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910000085 borane Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- ZOCHARZZJNPSEU-UHFFFAOYSA-N diboron Chemical compound B#B ZOCHARZZJNPSEU-UHFFFAOYSA-N 0.000 description 1
- PZPGRFITIJYNEJ-UHFFFAOYSA-N disilane Chemical compound [SiH3][SiH3] PZPGRFITIJYNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- OYMJNIHGVDEDFX-UHFFFAOYSA-J molybdenum tetrachloride Chemical compound Cl[Mo](Cl)(Cl)Cl OYMJNIHGVDEDFX-UHFFFAOYSA-J 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 210000003254 palate Anatomy 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
- VEDJZFSRVVQBIL-UHFFFAOYSA-N trisilane Chemical compound [SiH3][SiH2][SiH3] VEDJZFSRVVQBIL-UHFFFAOYSA-N 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- 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
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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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- 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
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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
- C23C16/08—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 halides
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45523—Pulsed gas flow or change of composition over time
- C23C16/45525—Atomic layer deposition [ALD]
- C23C16/45527—Atomic layer deposition [ALD] characterized by the ALD cycle, e.g. different flows or temperatures during half-reactions, unusual pulsing sequence, use of precursor mixtures or auxiliary reactants or activations
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45523—Pulsed gas flow or change of composition over time
- C23C16/45525—Atomic layer deposition [ALD]
- C23C16/45553—Atomic layer deposition [ALD] characterized by the use of precursors specially adapted for ALD
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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
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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
- H01L21/28562—Selective deposition
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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
- H01L21/28568—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 the conductive layers comprising transition metals
Definitions
- the present disclosure relates to a method for manufacturing a semiconductor device, a recording medium, and a substrate processing device.
- a low resistance tungsten (W) film is used as a word line of a NAND flash memory or DRAM having a three-dimensional structure.
- a titanium nitride (TiN) film may be used as a barrier film between the W film and the insulating film (see, for example, Patent Document 1 and Patent Document 2).
- the present disclosure aims to provide a technique capable of improving at least one of the electrical characteristics and the throughput of a metal-containing film.
- A The process of accommodating the substrate in the processing container and (B) A step of supplying the metal-containing gas to the substrate and (C) A step of supplying the first reducing gas to the substrate and (D) A step of supplying a second reducing gas different from the first reducing gas to the substrate.
- At least one of the electrical characteristics and the throughput of the metal-containing film can be improved.
- FIG. 1 is a schematic cross-sectional view taken along the line AA in FIG.
- FIG. 1 is a schematic block diagram of the controller of the substrate processing apparatus in one Embodiment of this disclosure, and is the figure which shows the control system of the controller by the block diagram.
- It is a figure which shows the substrate processing process in one Embodiment of this disclosure.
- It is a figure which shows the modification of the substrate processing process in one Embodiment of this disclosure.
- FIGS. 7 (A) and 7 (B) are diagrams showing a modified example of the substrate processing step in one embodiment of the present disclosure. It is a figure which shows the modification of the substrate processing process in one Embodiment of this disclosure.
- 9 (A) and 9 (B) are vertical cross-sectional views showing an outline of a processing furnace of a substrate processing apparatus according to another embodiment of the present disclosure.
- FIGS. 1 to 4. the drawings used in the following description are all schematic, and the dimensional relationship of each element, the ratio of each element, etc. shown in the drawings do not always match the actual ones. Further, even between the plurality of drawings, the relationship between the dimensions of each element, the ratio of each element, and the like do not always match.
- the substrate processing device 10 includes a processing furnace 202 provided with a heater 207 as a heating means (heating mechanism, heating system).
- the heater 207 has a cylindrical shape and is vertically installed by being supported by a heater base (not shown) as a holding plate.
- an outer tube 203 constituting a reaction tube (reaction vessel, processing vessel) concentrically with the heater 207 is arranged.
- the outer tube 203 is made of a heat-resistant material such as quartz (SiO 2 ) or silicon carbide (SiC), and is formed in a cylindrical shape with the upper end closed and the lower end open.
- a manifold (inlet flange) 209 is arranged concentrically with the outer tube 203.
- the manifold 209 is made of a metal such as stainless steel (SUS), and is formed in a cylindrical shape with open upper and lower ends.
- An O-ring 220a as a sealing member is provided between the upper end portion of the manifold 209 and the outer tube 203.
- the inner tube 204 constituting the reaction vessel is arranged inside the outer tube 203.
- the inner tube 204 is made of a heat-resistant material such as quartz or SiC, and is formed in a cylindrical shape with the upper end closed and the lower end open.
- a processing container (reaction container) is mainly composed of an outer tube 203, an inner tube 204, and a manifold 209.
- a processing chamber 201 is formed in the hollow portion of the processing container (inside the inner tube 204).
- the processing chamber 201 is configured to accommodate the wafer 200 as a substrate in a state of being arranged in multiple stages in the vertical direction in a horizontal posture by a boat 217 as a support.
- Nozzles 410, 420, 430 are provided in the processing chamber 201 so as to penetrate the side wall of the manifold 209 and the inner tube 204.
- Gas supply pipes 310, 320, 330 are connected to the nozzles 410, 420, 430, respectively.
- the processing furnace 202 of the present embodiment is not limited to the above-mentioned embodiment.
- the gas supply pipes 310, 320, and 330 are provided with mass flow controllers (MFCs) 312, 322, and 332, which are flow control units (flow control units), in order from the upstream side. Further, the gas supply pipes 310, 320, and 330 are provided with valves 314, 324, and 334, which are on-off valves, respectively. Gas supply pipes 510, 520, 530 for supplying the inert gas are connected to the downstream side of the valves 314, 324, 334 of the gas supply pipes 310, 320, 330, respectively.
- MFCs mass flow controllers
- valves 314, 324, and 334 which are on-off valves, respectively.
- Gas supply pipes 510, 520, 530 for supplying the inert gas are connected to the downstream side of the valves 314, 324, 334 of the gas supply pipes 310, 320, 330, respectively.
- the gas supply pipes 510, 520, and 530 are provided with MFC 512, 522, 532, which is a flow rate controller (flow control unit), and valves 514, 524, 534, which are on-off valves, in this order from the upstream side.
- MFC 512, 522, 532 which is a flow rate controller (flow control unit)
- valves 514, 524, 534 which are on-off valves, in this order from the upstream side.
- Nozzles 410, 420, 430 are connected to the tips of the gas supply pipes 310, 320, 330, respectively.
- the nozzles 410, 420, 430 are configured as L-shaped nozzles, and their horizontal portions are provided so as to penetrate the side wall of the manifold 209 and the inner tube 204.
- the vertical portion of the nozzles 410, 420, 430 is provided inside the channel-shaped (groove-shaped) spare chamber 201a formed so as to project radially outwardly and extend vertically of the inner tube 204. It is provided in the spare chamber 201a toward the upper side (upper in the arrangement direction of the wafer 200) along the inner wall of the inner tube 204.
- the nozzles 410, 420, 430 are provided so as to extend from the lower region of the processing chamber 201 to the upper region of the processing chamber 201, and a plurality of gas supply holes 410a, 420a, 430a are provided at positions facing the wafer 200, respectively. Is provided.
- the processing gas is supplied to the wafer 200 from the gas supply holes 410a, 420a, 430a of the nozzles 410, 420, 430, respectively.
- a plurality of the gas supply holes 410a, 420a, and 430a are provided from the lower part to the upper part of the inner tube 204, each having the same opening area, and further provided at the same opening pitch.
- the gas supply holes 410a, 420a, 430a are not limited to the above-mentioned form.
- the opening area may be gradually increased from the lower part to the upper part of the inner tube 204. This makes it possible to make the flow rate of the gas supplied from the gas supply holes 410a, 420a, 430a more uniform.
- a plurality of gas supply holes 410a, 420a, 430a of the nozzles 410, 420, 430 are provided at height positions from the lower part to the upper part of the boat 217, which will be described later. Therefore, the processing gas supplied into the processing chamber 201 from the gas supply holes 410a, 420a, 430a of the nozzles 410, 420, 430 is supplied to the entire area of the wafer 200 accommodated from the lower part to the upper part of the boat 217.
- the nozzles 410, 420, 430 may be provided so as to extend from the lower region to the upper region of the processing chamber 201, but are preferably provided so as to extend to the vicinity of the ceiling of the boat 217.
- a raw material gas (metal-containing gas) containing a metal element is supplied into the processing chamber 201 as a processing gas via the MFC 312, a valve 314, and a nozzle 410.
- the first reducing gas as the processing gas is supplied into the processing chamber 201 via the MFC 322, the valve 324, and the nozzle 420.
- a second reducing gas different from the first reducing gas is supplied into the processing chamber 201 via the MFC 332, the valve 334, and the nozzle 430.
- nitrogen (N 2 ) gas as an inert gas is introduced into the processing chamber via MFC512,522,532, valves 514,524,534, and nozzles 410,420,430, respectively. It is supplied in 201.
- N 2 gas used as the inert gas
- the inert gas for example, argon (Ar) gas, helium (He) gas, neon (Ne) gas, xenone, in addition to N 2 gas, will be described.
- a rare gas such as (Xe) gas may be used.
- the raw material gas supply system When the raw material gas is mainly flowed from the gas supply pipe 310, the raw material gas supply system is mainly composed of the gas supply pipe 310, the MFC 312, and the valve 314, but even if the nozzle 410 is included in the raw material gas supply system, it may be considered. good.
- the raw material gas supply system can also be referred to as a metal-containing gas supply system.
- the first reducing gas when the first reducing gas is flowed from the gas supply pipe 320, the first reducing gas supply system is mainly composed of the gas supply pipe 320, the MFC 322, and the valve 324, but the nozzle 420 is used as the first reducing gas supply system. You may consider including it.
- the second reducing gas supply system is mainly composed of the gas supply pipe 330, the MFC 332, and the valve 334, but the nozzle 430 is used as the second reducing gas supply system. You may consider including it.
- the metal-containing gas supply system, the first reduction gas supply system, and the second reduction gas supply system can also be referred to as a processing gas supply system.
- the nozzles 410, 420, 430 may be included in the processing gas supply system.
- the inert gas supply system is mainly composed of gas supply pipes 510, 520, 530, MFC 512, 522, 532, and valves 514, 524, 534.
- the method of gas supply in the present embodiment is the nozzles 410, 420, arranged in the spare chamber 201a in the annular vertically long space defined by the inner wall of the inner tube 204 and the ends of the plurality of wafers 200. Gas is transported via 430. Then, gas is ejected into the inner tube 204 from a plurality of gas supply holes 410a, 420a, 430a provided at positions facing the wafers of the nozzles 410, 420, 430.
- the gas supply hole 410a of the nozzle 410, the gas supply hole 420a of the nozzle 420, and the gas supply hole 430a of the nozzle 430 eject the raw material gas or the like in the direction parallel to the surface of the wafer 200.
- the exhaust hole (exhaust port) 204a is a through hole formed at a position facing the nozzles 410, 420, 430 on the side wall of the inner tube 204, and is, for example, a slit-shaped through hole formed elongated in the vertical direction. Is.
- the gas supplied into the processing chamber 201 from the gas supply holes 410a, 420a, 430a of the nozzles 410, 420, 430 and flowing on the surface of the wafer 200 passes through the exhaust holes 204a into the inner tube 204 and the outer tube 203. It flows through the gap (inside the exhaust passage 206) formed between them. Then, the gas that has flowed into the exhaust passage 206 flows into the exhaust pipe 231 and is discharged to the outside of the processing furnace 202.
- the exhaust holes 204a are provided at positions facing the plurality of wafers 200, and the gas supplied from the gas supply holes 410a, 420a, 430a to the vicinity of the wafer 200 in the processing chamber 201 flows in the horizontal direction. After that, it flows into the exhaust passage 206 through the exhaust hole 204a.
- the exhaust hole 204a is not limited to the case where it is configured as a slit-shaped through hole, and may be configured by a plurality of holes.
- the manifold 209 is provided with an exhaust pipe 231 for exhausting the atmosphere in the processing chamber 201.
- a pressure sensor 245 as a pressure detector (pressure detection unit) for detecting the pressure in the processing chamber 201
- an APC (AutoPressure Controller) valve 243 is connected in order from the upstream side.
- the APC valve 243 can perform vacuum exhaust and vacuum exhaust stop in the processing chamber 201 by opening and closing the valve with the vacuum pump 246 operating, and further, the valve with the vacuum pump 246 operating. By adjusting the opening degree, the pressure in the processing chamber 201 can be adjusted.
- the exhaust system is mainly composed of the exhaust hole 204a, the exhaust passage 206, the exhaust pipe 231 and the APC valve 243 and the pressure sensor 245.
- the vacuum pump 246 may be included in the exhaust system.
- a seal cap 219 is provided as a furnace palate body that can airtightly close the lower end opening of the manifold 209.
- the seal cap 219 is configured to abut on the lower end of the manifold 209 from the lower side in the vertical direction.
- the seal cap 219 is made of a metal such as SUS and is formed in a disk shape.
- An O-ring 220b as a sealing member that comes into contact with the lower end of the manifold 209 is provided on the upper surface of the seal cap 219.
- a rotation mechanism 267 for rotating the boat 217 accommodating the wafer 200 is installed on the opposite side of the processing chamber 201 in the seal cap 219.
- the rotation shaft 255 of the rotation mechanism 267 penetrates the seal cap 219 and is connected to the boat 217.
- the rotation mechanism 267 is configured to rotate the wafer 200 by rotating the boat 217.
- the seal cap 219 is configured to be raised and lowered in the vertical direction by a boat elevator 115 as a raising and lowering mechanism vertically installed outside the outer tube 203.
- the boat elevator 115 is configured so that the boat 217 can be carried in and out of the processing chamber 201 by raising and lowering the seal cap 219.
- the boat elevator 115 is configured as a transport device (transport mechanism, transport system) for transporting the wafers 200 housed in the boat 217 and the boat 217 into and out of the processing chamber 201.
- the boat 217 is configured to arrange a plurality of wafers, for example, 25 to 200 wafers 200, in a horizontal posture and with their centers aligned with each other at intervals in the vertical direction.
- the boat 217 is made of a heat resistant material such as quartz or SiC.
- a dummy substrate 218 made of a heat-resistant material such as quartz or SiC is supported in multiple stages in a horizontal posture. With this configuration, the heat from the heater 207 is less likely to be transmitted to the seal cap 219 side.
- this embodiment is not limited to the above-mentioned embodiment.
- a heat insulating cylinder configured as a tubular member made of a heat-resistant material such as quartz or SiC may be provided.
- a temperature sensor 263 as a temperature detector is installed in the inner tube 204, and the amount of electricity supplied to the heater 207 is adjusted based on the temperature information detected by the temperature sensor 263.
- the temperature in the processing chamber 201 is configured to have a desired temperature distribution.
- the temperature sensor 263 is L-shaped like the nozzles 410, 420, 430, and is provided along the inner wall of the inner tube 204.
- the controller 121 which is a control unit (control means), is configured as a computer including a CPU (Central Processing Unit) 121a, a RAM (Random Access Memory) 121b, a storage device 121c, and an I / O port 121d.
- the RAM 121b, the storage device 121c, and the I / O port 121d are configured so that data can be exchanged with the CPU 121a via the internal bus.
- An input / output device 122 configured as, for example, a touch panel or the like is connected to the controller 121.
- the storage device 121c is composed of, for example, a flash memory, an HDD (Hard Disk Drive), or the like.
- a control program for controlling the operation of the substrate processing device, a process recipe in which procedures and conditions of a method for manufacturing a semiconductor device to be described later are described, and the like are readablely stored.
- the process recipes are combined so that the controller 121 can execute each step (each step) in the method of manufacturing a semiconductor device described later and obtain a predetermined result, and functions as a program.
- this process recipe, control program, etc. are collectively referred to simply as a program.
- the RAM 121b is configured as a memory area (work area) in which programs, data, and the like read by the CPU 121a are temporarily held.
- the I / O port 121d has the above-mentioned MFC 312,322,332,512,522,532, valve 314,324,334,514,524,534, pressure sensor 245, APC valve 243, vacuum pump 246, heater 207, temperature. It is connected to a sensor 263, a rotation mechanism 267, a boat elevator 115, and the like.
- the CPU 121a is configured to read a control program from the storage device 121c and execute it, and to read a recipe or the like from the storage device 121c in response to an input of an operation command from the input / output device 122 or the like.
- the CPU 121a has an operation of adjusting the flow rate of various gases by MFC 312,322,332,512,522,532, an opening / closing operation of valves 314,324,334,514,524,534, and an APC valve so as to follow the contents of the read recipe.
- the controller 121 is stored in an external storage device (for example, a magnetic tape, a magnetic disk such as a flexible disk or a hard disk, an optical disk such as a CD or DVD, a magneto-optical disk such as MO, a semiconductor memory such as a USB memory or a memory card) 123.
- the above-mentioned program can be configured by installing it on a computer.
- the storage device 121c and the external storage device 123 are configured as a computer-readable recording medium. Hereinafter, these are collectively referred to simply as a recording medium.
- the recording medium may include only the storage device 121c alone, may include only the external storage device 123 alone, or may include both of them.
- the program may be provided to the computer by using a communication means such as the Internet or a dedicated line without using the external storage device 123.
- Substrate processing step As one step of the manufacturing process of the semiconductor device (device), an example of a step of forming a Mo-containing film containing molybdenum (Mo) used as a control gate electrode of, for example, 3D NAND on a wafer 200. , FIG. 4 will be described.
- the step of forming the Mo-containing film is performed using the processing furnace 202 of the substrate processing apparatus 10 described above. In the following description, the operation of each part constituting the substrate processing device 10 is controlled by the controller 121.
- wafer When the word “wafer” is used in the present specification, it may mean “wafer itself” or “a laminate of a wafer and a predetermined layer, film, etc. formed on the surface thereof". be.
- wafer surface When the term “wafer surface” is used in the present specification, it may mean “the surface of the wafer itself” or “the surface of a predetermined layer, film, etc. formed on the wafer”. be.
- the use of the term “wafer” in the present specification is also synonymous with the use of the term “wafer”.
- the inside of the processing chamber 201 that is, the space where the wafer 200 is present, is evacuated by the vacuum pump 246 so as to have a desired pressure (degree of vacuum).
- the pressure in the processing chamber 201 is measured by the pressure sensor 245, and the APC valve 243 is feedback-controlled based on the measured pressure information (pressure adjustment).
- the vacuum pump 246 is always kept in operation until at least the processing for the wafer 200 is completed. Further, the inside of the processing chamber 201 is heated by the heater 207 so as to have a desired temperature.
- the amount of electricity supplied to the heater 207 is feedback-controlled based on the temperature information detected by the temperature sensor 263 so that the inside of the processing chamber 201 has a desired temperature distribution (temperature adjustment).
- the heating in the processing chamber 201 by the heater 207 is continuously performed at least until the processing on the wafer 200 is completed.
- the valve 314 is opened to allow a metal-containing gas, which is a raw material gas, to flow into the gas supply pipe 310.
- the flow rate of the metal-containing gas is adjusted by the MFC 312, is supplied into the processing chamber 201 from the gas supply hole 410a of the nozzle 410, and is exhausted from the exhaust pipe 231.
- the metal-containing gas is supplied to the wafer 200.
- the valve 514 is opened to allow an inert gas such as N 2 gas to flow into the gas supply pipe 510.
- the flow rate of the inert gas flowing in the gas supply pipe 510 is adjusted by the MFC 512, is supplied into the processing chamber 201 together with the metal-containing gas, and is exhausted from the exhaust pipe 231.
- the valves 524 and 534 are opened to allow the inert gas to flow into the gas supply pipes 520 and 530.
- the inert gas is supplied into the processing chamber 201 via the gas supply pipes 320, 330 and the nozzles 420, 430, and is exhausted from the exhaust pipe 231.
- the APC valve 243 is adjusted so that the pressure in the processing chamber 201 is, for example, a pressure in the range of 1 to 3990 Pa, for example, 1000 Pa.
- the supply flow rate of the metal-containing gas controlled by the MFC 312 is, for example, a flow rate in the range of 0.1 to 1.0 slm, preferably 0.3 to 0.9 slm.
- the supply flow rate of the inert gas controlled by the MFC 512,522,532 is, for example, a flow rate within the range of 0.1 to 20 slm.
- the temperature of the heater 207 is set to a temperature such that the temperature of the wafer 200 is in the range of, for example, 300 to 650 ° C.
- the gas flowing in the processing chamber 201 is only the metal-containing gas and the inert gas.
- the metal-containing gas for example, a molybdenum (Mo) -containing gas containing molybdenum (Mo) as a metal element can be used.
- Mo-containing gas for example, molybdenum dichloride (MoO 2 Cl 2 ) gas containing Mo, oxygen (O) and chlorine (Cl), and molybdenum tetrachloride (MoOCl 4 ) gas can be used.
- Mo-containing gas for example, molybdenum dichloride (MoO 2 Cl 2 ) gas containing Mo, oxygen (O) and chlorine (Cl), and molybdenum tetrachloride (MoOCl 4 ) gas can be used.
- Mo-containing gas By supplying the Mo-containing gas, a Mo-containing layer is formed on the wafer 200 (the base film on the surface).
- the Mo-containing layer may be a Mo layer containing Cl
- the valve 314 of the gas supply pipe 310 is closed to stop the supply of the metal-containing gas. That is, the time for supplying the metal-containing gas to the wafer 200 is, for example, a time in the range of 1 to 60 seconds.
- the APC valve 243 of the exhaust pipe 231 is left open, the inside of the processing chamber 201 is evacuated by the vacuum pump 246, and the unreacted or metal-containing layer remaining in the processing chamber 201 is contributed to the formation of the metal-containing gas. Is excluded from the processing chamber 201.
- the inside of the processing chamber 201 is purged.
- the valves 514, 524, 534 are left open to maintain the supply of the inert gas into the processing chamber 201.
- the inert gas acts as a purge gas, and can enhance the effect of removing the unreacted metal-containing gas remaining in the treatment chamber 201 or the metal-containing gas after contributing to the formation of the metal-containing layer from the treatment chamber 201.
- the first reducing gas and the second reducing gas are simultaneously supplied to the wafer 200.
- the valves 514, 524, 534 are kept open to maintain the supply of the inert gas into the gas supply pipes 510, 520, 530.
- the flow rate of the inert gas flowing in the gas supply pipes 510, 520, and 530 is adjusted by the MFC 512, 522, 532, respectively.
- the inert gas flowing in the gas supply pipe 520 is supplied to the processing chamber 201 together with the first reducing gas through the gas supply pipe 320 and the nozzle 420, and is exhausted from the exhaust pipe 231.
- the inert gas flowing in the gas supply pipe 530 is supplied to the processing chamber 201 together with the second reducing gas through the gas supply pipe 330 and the nozzle 430, and is exhausted from the exhaust pipe 231. Further, the inert gas flowing in the gas supply pipe 510 is supplied into the processing chamber 201 via the gas supply pipe 310 and the nozzle 410, exhausted from the exhaust pipe 231 and the first reducing gas and the first reducing gas into the nozzle 410. 2 Prevent the intrusion of reducing gas.
- the APC valve 243 is adjusted so that the pressure in the processing chamber 201 is, for example, a pressure in the range of 1 to 13300 Pa, for example, 10000 Pa.
- the supply flow rate of the first reducing gas controlled by the MFC 322 is, for example, a flow rate within the range of 1 to 50 slm, preferably 15 to 30 slm.
- the supply flow rate of the second reducing gas controlled by the MFC 332 is, for example, a flow rate in the range of 0.1 to 1.0 slm, preferably 0.1 to 0.5 slm.
- the supply flow rate of the inert gas controlled by the MFC 512,522,532 is, for example, a flow rate within the range of 0.1 to 30 slm.
- the temperature of the heater 207 is set to a temperature such that the temperature of the wafer 200 is in the range of, for example, 300 to 650 ° C.
- the gases flowing in the processing chamber 201 are the first reducing gas, the second reducing gas, and the inert gas. That is, the first reducing gas and the second reducing gas are simultaneously supplied to the wafer 200. In other words, the first reducing gas and the second reducing gas have timings to be supplied at the same time.
- the first reducing gas for example, hydrogen (H 2 ) gas or deuterium (D 2 ), which is a gas composed of hydrogen (H), can be used.
- the second reducing gas for example, phosphine (PH 3 ) gas, which is a gas containing hydrogen (H) and other elements, can be used.
- PH 3 phosphine
- the second reducing gas a gas having a higher reducing action than the first reducing gas is used.
- the second reducing gas is a gas of a compound having a larger negative value of the standard generated Gibbs energy than the first reducing gas.
- a chemical reaction is likely to occur between the MoO 2 Cl 2 gas and the PH 3 gas. That is, the larger the negative value of the standard generated Gibbs energy, the easier it is for the reaction to occur, and the easier it is to generate a gas such as POCl 4 .
- POCl 4 has the property of being easily desorbed and not easily adsorbed on the membrane. That is, by supplying PH 3 gas, POCl 4 that is easily desorbed from the membrane and is not easily adsorbed on the membrane can be produced as a reaction by-product.
- the flow rate of the inert gas flowing in the gas supply pipes 510, 520, and 530 is adjusted by the MFC 512, 522, 532, respectively.
- the inert gas flowing in the gas supply pipe 520 is supplied to the processing chamber 201 together with the first reducing gas through the gas supply pipe 320 and the nozzle 420, and is exhausted from the exhaust pipe 231.
- the inert gas flowing through the gas supply pipes 510 and 530 is supplied into the processing chamber 201 via the gas supply pipes 310 and 330 and the nozzles 410 and 430, respectively, and is exhausted from the exhaust pipe 231 to the nozzles 410 and 430. Prevents the intrusion of the first reducing gas into the inside.
- the gases flowing in the processing chamber 201 are the first reducing gas and the inert gas. That is, the first reducing gas and the inert gas are supplied to the wafer 200.
- the supply of the first reducing gas and the supply of the second reducing gas are started at the same time, the supply of the second reducing gas is stopped, and then the supply of the first reducing gas is stopped.
- the supply of the first reducing gas and the supply of the second reducing gas are partially performed in parallel, and the supply time of the second reducing gas to the wafer 200 is made shorter than the supply time of the first reducing gas.
- the supply time of the first reducing gas is longer than the supply time of the second reducing gas.
- the supply time of PH 3 gas is set longer than the supply time of PH 3 gas.
- POCl 4 which is a reaction by-product can be removed, the residue of POCl 4 can be suppressed, and the phosphorus (P) content in the Mo-containing layer can be reduced.
- a metal-containing film having a predetermined thickness is formed on the wafer 200 by performing the cycle of sequentially performing the first step to the fifth step described above at least once (predetermined number of times (n times)).
- the above cycle is preferably repeated multiple times.
- the metal-containing gas is a Mo-containing gas
- a Mo-containing film as the metal-containing film is formed.
- the Mo-containing film is a film containing molybdenum as a main component.
- Inert gas is supplied into the processing chamber 201 from each of the gas supply pipes 510, 520, and 530, and is exhausted from the exhaust pipe 231.
- the inert gas acts as a purge gas, whereby the inside of the treatment chamber 201 is purged with the inert gas, and the gas and reaction by-products remaining in the treatment chamber 201 are removed from the inside of the treatment chamber 201 (after-purge).
- the atmosphere in the processing chamber 201 is replaced with the inert gas (replacement of the inert gas), and the pressure in the treatment chamber 201 is restored to the normal pressure (return to atmospheric pressure).
- the seal cap 219 is lowered by the boat elevator 115, and the lower end of the outer tube 203 is opened. Then, the processed wafer 200 is carried out (boat unloading) from the lower end of the outer tube 203 to the outside of the outer tube 203 in a state of being supported by the boat 217. After that, the processed wafer 200 is taken out from the boat 217 (wafer discharge).
- Modification 1 In this modification, as shown in FIG. 5, after the metal-containing gas supply which is the first step described above and the residual gas removal which is the second step described above, the supply of the second reducing gas is performed as the third step. Is started, and after a predetermined time has elapsed from the start of the supply of the second reducing gas, for example, 1 to 20 seconds later, the supply of the first reducing gas is started as the fourth step. Then, after a predetermined time has elapsed from the simultaneous supply of the first reducing gas and the second reducing gas, for example, 1 to 20 seconds later, the supply of the second reducing gas is stopped, and the second reducing gas is used as the fifth step.
- the supply of the first reducing gas is stopped after a lapse of a predetermined time, for example, 1 to 120 seconds after the supply of the first reducing gas is stopped. Then, as the sixth step, the residual gas is removed, and the cycle in which the first step to the sixth step are sequentially performed is performed at least once (predetermined number of times (n times)), whereby a predetermined number is determined on the wafer 200. Form a metal-containing film of the same thickness. Also in this modification, the supply time of the second reducing gas to the wafer 200 is shorter than the supply time of the first reducing gas.
- the supply of the second reducing gas is started, the supply of the first reducing gas is started, the supply of the first reducing gas and the supply of the second reducing gas are partially performed in parallel, and the supply of the second reducing gas is performed. After stopping, the supply of the first reducing gas is stopped. In this way, by supplying the second reducing gas before the first reducing gas, the adsorbed layer of the metal-containing gas molecule and the metal-containing layer containing an element other than the metal contained in the metal-containing gas can be changed to other than the metal. The element can be removed to form a film in a state where it can be easily reduced with the first reducing gas.
- the contact probability between the adsorption layer of the metal-containing gas molecule and the second reducing gas molecule can be improved, and the first reducing gas can be improved. It is possible to form a film in a state where it can be easily reduced. Further, by stopping the supply of the first reducing gas after stopping the supply of the second reducing gas, the residual reaction by-products can be suppressed. Even in this case, the same effect as the sequence shown in FIG. 4 described above can be obtained.
- the metal-containing gas is MoO 2 Cl 2 gas
- O and Cl are removed from the MoO 2 Cl 2 adsorption layer and the Mo-containing layer containing Cl and O, and the reduction is easy with the first reducing gas.
- the film can be formed.
- Modification 2 In this modification, as shown in FIG. 6, after the metal-containing gas supply which is the first step described above and the residual gas removal which is the second step described above, the supply of the first reducing gas is performed as the third step. Is started, and after a predetermined time has elapsed from the start of the supply of the first reducing gas, for example, 1 to 60 seconds later, the supply of the second reducing gas is started as the fourth step. Then, after a predetermined time has elapsed from the simultaneous supply of the first reducing gas and the second reducing gas, for example, 1 to 60 seconds later, the supply of the second reducing gas is stopped, and the second reducing gas is used as the fifth step.
- the supply of the first reducing gas is stopped after a lapse of a predetermined time, for example, 1 to 60 seconds after the supply of the first reducing gas is stopped. That is, the supply of the second reducing gas is started during the supply of the first reducing gas, and the supply of the second reducing gas is stopped. That is, the second reducing gas is supplied while the first reducing gas is being supplied. In other words, the supply of the second reducing gas is started after the supply of the first reducing gas is started, the supply of the second reducing gas is stopped, and then the supply of the first reducing gas is stopped.
- a predetermined time for example, 1 to 60 seconds after the supply of the first reducing gas is stopped. That is, the supply of the second reducing gas is started during the supply of the first reducing gas, and the supply of the second reducing gas is stopped. That is, the second reducing gas is supplied while the first reducing gas is being supplied.
- the supply of the second reducing gas is started after the supply of the first reducing gas is started, the supply of
- the sixth step the residual gas is removed, and the cycle in which the first step to the sixth step are sequentially performed is performed at least once (predetermined number of times (n times)), whereby a predetermined number is determined on the wafer 200.
- n times predetermined number of times
- the supply time of the second reducing gas to the wafer 200 is shorter than the supply time of the first reducing gas.
- the supply of the first reducing gas is started, the supply of the second reducing gas is started, the supply of the first reducing gas and the supply of the second reducing gas are partially performed in parallel, and the supply of the second reducing gas is performed. After stopping, the supply of the first reducing gas is stopped.
- the residual reaction by-products can be suppressed. Even in this case, the same effect as the sequence shown in FIG. 4 described above can be obtained.
- Modification 3 In this modification, as shown in FIGS. 7 (A) and 7 (B), the metal-containing gas supply which is the first step, the residual gas removal which is the second step described above, and the third step. After supplying the second reducing gas, the first reducing gas is supplied as the fourth step, and the residual gas is removed as the fifth step. Then, a metal-containing film having a predetermined thickness is formed on the wafer 200 by performing at least one cycle (predetermined number of times (n times)) in which the first step to the fifth step are sequentially performed. That is, the supply of the second reducing gas and the supply of the first reducing gas are not performed in parallel but separately. As shown in FIG.
- the supply of the second reducing gas and the supply of the first reducing gas may be performed continuously, and as shown in FIG. 7B, the second reduction gas may be supplied.
- the inside of the processing chamber 201 may be purged by removing the residual gas between the supply of the reducing gas and the supply of the first reducing gas. Also in this modification, the supply time of the second reducing gas to the wafer 200 is shorter than the supply time of the first reducing gas.
- the supply of the second reducing gas is started before the supply of the first reducing gas, the second reducing gas is supplied, and then the first reducing gas is supplied.
- H 2 gas is used as the first reducing gas
- PH 3 gas is used as the second reducing gas.
- Modification example 4 In this modification, as shown in FIG. 8, after performing the metal-containing gas supply which is the first step and the residual gas removal which is the second step described above, the second reducing gas is used as the third step.
- the step of supplying and the step of removing the residual gas as the fourth step are performed, and the cycle of sequentially performing the above-mentioned first step to the fourth step is performed at least once (predetermined number of times (n times)).
- a metal-containing film having a predetermined thickness is formed on the wafer 200. That is, the above-mentioned first reducing gas is not supplied.
- MoO 2 Cl 2 gas is used as the metal-containing gas (Mo-containing gas)
- Mo-containing gas Mo-containing gas
- H 2 gas used as the first reducing gas
- deuterium (D 2 ) is activated.
- Other reducing gases such as hydrogen gas containing hydrogen can be used.
- PH 3 gas used as the second reducing gas
- the present disclosure is not limited to this, and for example, monosilane (SiH 4 ) gas and disilane (Si 2 ).
- Other reductions such as H 6 ) gas, trisilane (Si 3 H 8 ) gas, silane gas such as tetrasilane (Si 4 H 10 ), and borane gas such as monoborane (BH 3 ) and diborane (B 2 H 6 ). Gas can be used.
- H 6 monosilane
- Si 3 H 8 trisilane
- silane gas such as tetrasilane
- borane gas such as monoborane (BH 3 ) and diborane (B 2 H 6 ).
- BH 3 monoborane
- B 2 H 6 diborane
- PH 3 gas is preferable as the second reducing gas.
- the present disclosure can be suitably applied to the case where a film is formed by using a substrate processing apparatus provided with the processing furnace 302 shown in FIG. 9 (A).
- the processing furnace 302 serves as a support for supporting the processing container 303 forming the processing chamber 301, the shower head 303s for supplying gas into the processing chamber 301 in a shower shape, and one or several wafers 200 in a horizontal posture.
- the support base 317, a rotating shaft 355 that supports the support base 317 from below, and a heater 307 provided on the support base 317 are provided.
- the gas supply port 332a for supplying the metal-containing gas, the gas supply port 332b for supplying the first reducing gas, and the second reducing gas described above are supplied to the inlet (gas inlet) of the shower head 303s.
- Gas supply port 332c is connected.
- a gas supply system similar to the metal-containing gas supply system of the above-described embodiment is connected to the gas supply port 332a.
- a gas supply system similar to the first reducing gas supply system of the above-described embodiment is connected to the gas supply port 332b.
- a gas supply system similar to the above-mentioned second reducing gas supply system is connected to the gas supply port 332c.
- the outlet (gas discharge port) of the shower head 303s is provided with a gas dispersion plate that supplies gas in a shower shape in the processing chamber 301.
- the processing container 303 is provided with an exhaust port 331 for exhausting the inside of the processing chamber 301.
- An exhaust system similar to the exhaust system of the above-described embodiment is connected to the exhaust port 331.
- the processing furnace 402 includes a processing container 403 forming the processing chamber 401, a support base 417 as a support tool for supporting one or several wafers 200 in a horizontal posture, and a rotary shaft 455 for supporting the support base 417 from below.
- a lamp heater 407 that irradiates the wafer 200 of the processing container 403 with light, and a quartz window 403w that transmits the light of the lamp heater 407 are provided.
- the above-mentioned gas supply port 432a for supplying the metal-containing gas, the above-mentioned gas supply port 432b for supplying the first reducing gas, and the above-mentioned gas supply port 432c for supplying the second reducing gas are connected to the processing container 403.
- a gas supply system similar to the metal-containing gas supply system of the above-described embodiment is connected to the gas supply port 432a.
- a gas supply system similar to the first reducing gas supply system of the above-described embodiment is connected to the gas supply port 432b.
- a gas supply system similar to the second reducing gas supply system of the above-described embodiment is connected to the gas supply port 432c.
- the processing container 403 is provided with an exhaust port 431 for exhausting the inside of the processing chamber 401.
- An exhaust system similar to the exhaust system of the above-described embodiment is connected to the exhaust port 431.
- film formation can be performed under the same sequence and processing conditions as those in the above-described embodiment.
- the process recipe (program that describes the treatment procedure, treatment conditions, etc.) used for forming these various thin films is the content of the substrate treatment (film type, composition ratio, film quality, film thickness, treatment procedure, treatment of the thin film to be formed). It is preferable to prepare each individually (multiple preparations) according to conditions, etc.). Then, when starting the substrate processing, it is preferable to appropriately select an appropriate process recipe from a plurality of process recipes according to the content of the substrate processing.
- the board processing device includes a plurality of process recipes individually prepared according to the content of the board processing via a telecommunication line or a recording medium (external storage device 123) in which the process recipe is recorded. It is preferable to store (install) it in the storage device 121c in advance.
- the CPU 121a included in the substrate processing apparatus appropriately selects an appropriate process recipe from the plurality of process recipes stored in the storage device 121c according to the content of the substrate processing. Is preferable. With this configuration, it becomes possible to form thin films of various film types, composition ratios, film qualities, and film thicknesses with a single substrate processing device in a versatile and reproducible manner. In addition, the operator's operation load (input load such as processing procedure and processing conditions) can be reduced, and the board processing can be started quickly while avoiding operation mistakes.
- the present disclosure can also be realized by, for example, changing the process recipe of the existing substrate processing apparatus.
- the process recipe according to the present disclosure may be installed on an existing board processing device via a telecommunications line or a recording medium on which the process recipe is recorded, or input / output of the existing board processing device. It is also possible to operate the device and change the process recipe itself to the process recipe according to the present disclosure.
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Abstract
Description
この課題を解決するために、上述したようなTiN膜とW膜を用いる代わりに、モリブデン(Mo)膜を形成して用いる場合がある。しかし、低抵抗でかつ異物の少ないMo膜を形成するには、大流量のH2ガスを長時間流す必要がある。それ故、スループットの低下が課題となっている。
(a)基板を処理容器に収容する工程と、
(b)前記基板に対して金属含有ガスを供給する工程と、
(c)前記基板に対して第1還元ガスを供給する工程と、
(d)前記基板に対して前記第1還元ガスとは異なる第2還元ガスを供給する工程と、を有し、
(b)と(c)と(d)とを1回以上行うことにより、前記基板上に金属含有膜を形成する
技術が提供される。
基板処理装置10は、加熱手段(加熱機構、加熱系)としてのヒータ207が設けられた処理炉202を備える。ヒータ207は円筒形状であり、保持板としてのヒータベース(図示せず)に支持されることにより垂直に据え付けられている。
半導体装置(デバイス)の製造工程の一工程として、ウエハ200上に、例えば3DNANDのコントロールゲート電極として用いられるモリブデン(Mo)を含有するMo含有膜を形成する工程の一例について、図4を用いて説明する。Mo含有膜を形成する工程は、上述した基板処理装置10の処理炉202を用いて実行される。以下の説明において、基板処理装置10を構成する各部の動作はコントローラ121により制御される。
(a)ウエハ200を処理容器内である処理室201に収容する工程と、
(b)ウエハ200に対して金属含有ガスを供給する工程と、
(c)ウエハ200に対して第1還元ガスを供給する工程と、
(d)ウエハ200に対して第2還元ガスを供給する工程と、を有し、
(b)と(c)と(d)とを1回以上行うことにより、ウエハ200上に金属含有膜としてMo含有膜を形成する。
複数枚のウエハ200がボート217に装填(ウエハチャージ)されると、図1に示されているように、複数枚のウエハ200を支持したボート217は、ボートエレベータ115によって持ち上げられて、処理室201内に搬入(ボートロード)され、処理容器に収容される。この状態で、シールキャップ219はOリング220を介してアウタチューブ203の下端開口を閉塞した状態となる。
処理室201内、すなわち、ウエハ200が存在する空間が所望の圧力(真空度)となるように真空ポンプ246によって真空排気される。この際、処理室201内の圧力は、圧力センサ245で測定され、この測定された圧力情報に基づき、APCバルブ243がフィードバック制御される(圧力調整)。真空ポンプ246は、少なくともウエハ200に対する処理が完了するまでの間は常時作動させた状態を維持する。また、処理室201内が所望の温度となるようにヒータ207によって加熱される。この際、処理室201内が所望の温度分布となるように、温度センサ263が検出した温度情報に基づきヒータ207への通電量がフィードバック制御される(温度調整)。ヒータ207による処理室201内の加熱は、少なくともウエハ200に対する処理が完了するまでの間は継続して行われる。
(金属含有ガス供給)
バルブ314を開き、ガス供給管310内に原料ガスである金属含有ガスを流す。金属含有ガスは、MFC312により流量調整され、ノズル410のガス供給孔410aから処理室201内に供給され、排気管231から排気される。このとき、ウエハ200に対して金属含有ガスが供給される。このとき同時にバルブ514を開き、ガス供給管510内にN2ガス等の不活性ガスを流す。ガス供給管510内を流れた不活性ガスは、MFC512により流量調整され、金属含有ガスと一緒に処理室201内に供給され、排気管231から排気される。このとき、ノズル420,430内への金属含有ガスの侵入を防止するために、バルブ524,534を開き、ガス供給管520,530内に不活性ガスを流す。不活性ガスは、ガス供給管320,330、ノズル420,430を介して処理室201内に供給され、排気管231から排気される。
(残留ガス除去)
金属含有ガスの供給を開始してから所定時間経過後であって例えば1~60秒後に、ガス供給管310のバルブ314を閉じて、金属含有ガスの供給を停止する。つまり、金属含有ガスをウエハ200に対して供給する時間は、例えば1~60秒の範囲内の時間とする。このとき排気管231のAPCバルブ243は開いたままとして、真空ポンプ246により処理室201内を真空排気し、処理室201内に残留する未反応もしくは金属含有層形成に寄与した後の金属含有ガスを処理室201内から排除する。すなわち、処理室201内をパージする。このときバルブ514,524,534は開いたままとして、不活性ガスの処理室201内への供給を維持する。不活性ガスはパージガスとして作用し、処理室201内に残留する未反応もしくは金属含有層形成に寄与した後の金属含有ガスを処理室201内から排除する効果を高めることができる。
(第1還元ガスと第2還元ガスの同時供給)
処理室201内の残留ガスを除去した後、バルブ324,334を同時に開き、ガス供給管320,330内に、それぞれ第1還元ガスと第2還元ガスを流す。第1還元ガスは、MFC322により流量調整され、ノズル420のガス供給孔420aから処理室201内に供給され、排気管231から排気される。第2還元ガスは、MFC332により流量調整され、ノズル430のガス供給孔430aから処理室201内に供給され、排気管231から排気される。このときウエハ200に対して、第1還元ガスと第2還元ガスが同時に供給される。このときバルブ514,524,534は開いたままとしてガス供給管510,520,530内への不活性ガスの供給を維持する。ガス供給管510,520,530内を流れた不活性ガスは、MFC512,522,532によりそれぞれ流量調整される。ガス供給管520内は流れた不活性ガスは第1還元ガスと一緒にガス供給管320、ノズル420を介して処理室201内に供給され、排気管231から排気される。またガス供給管530内を流れた不活性ガスは第2還元ガスと一緒にガス供給管330、ノズル430を介して処理室201内に供給され、排気管231から排気される。またガス供給管510内を流れた不活性ガスは、ガス供給管310、ノズル410を介して処理室201内に供給され、排気管231から排気され、ノズル410内への第1還元ガス、第2還元ガスの侵入を防止する。
(第1還元ガス供給)
第1還元ガスと第2還元ガスの同時供給を開始してから所定時間経過後であって例えば1~1200秒後に、ガス供給管330のバルブ334を閉じて、第2還元ガスの供給を停止する。つまり、第1還元ガスと第2還元ガスを同時にウエハ200に対して供給する時間は、例えば1~1200秒の範囲内の時間とする。このときバルブ514,524,534は開いたままとしてガス供給管510,520,530内への不活性ガスの供給を維持する。ガス供給管510,520,530内を流れた不活性ガスは、MFC512,522,532によりそれぞれ流量調整される。ガス供給管520内は流れた不活性ガスは第1還元ガスと一緒にガス供給管320、ノズル420を介して処理室201内に供給され、排気管231から排気される。またガス供給管510,530内を流れた不活性ガスは、ガス供給管310,330、ノズル410,430を介して処理室201内にそれぞれ供給され、排気管231から排気され、ノズル410,430内への第1還元ガスの侵入を防止する。
(残留ガス除去)
第1還元ガスの供給を開始してから所定時間経過後であって例えば1~1200秒後に、ガス供給管320のバルブ324を閉じて、第1還元ガスの供給を停止する。そして、上述した第2の工程と同様の処理手順により、処理室201内に残留する未反応もしくは金属含有層の形成に寄与した後の第1還元ガスや反応副生成物を処理室201内から排除する。すなわち、処理室201内をパージする。
上記した第1の工程~第5の工程を順に行うサイクルを少なくとも1回以上(所定回数(n回))行うことにより、ウエハ200上に、所定の厚さの金属含有膜を形成する。上述のサイクルは、複数回繰り返すのが好ましい。ここで、金属含有ガスがMo含有ガスの場合、金属含有膜としてのMo含有膜を形成することとなる。なお、Mo含有膜は、モリブデンを主成分とする膜である。
ガス供給管510,520,530のそれぞれから不活性ガスを処理室201内へ供給し、排気管231から排気する。不活性ガスはパージガスとして作用し、これにより処理室201内が不活性ガスでパージされ、処理室201内に残留するガスや反応副生成物が処理室201内から除去される(アフターパージ)。その後、処理室201内の雰囲気が不活性ガスに置換され(不活性ガス置換)、処理室201内の圧力が常圧に復帰される(大気圧復帰)。
その後、ボートエレベータ115によりシールキャップ219が下降されて、アウタチューブ203の下端が開口される。そして、処理済ウエハ200がボート217に支持された状態でアウタチューブ203の下端からアウタチューブ203の外部に搬出(ボートアンロード)される。その後、処理済のウエハ200は、ボート217より取り出される(ウエハディスチャージ)。
本実施形態によれば、以下に示す1つまたは複数の効果を得ることができる。
(a)Mo含有膜の電気的特性を向上させることができる。
(b)異物(副生成物等)が低減された、低抵抗なMo含有膜を形成することができる。
(c)生産性(スループット)を向上させることができる。
次に、上述した実施形態における基板処理工程の変形例について詳述する。以下の変形例では、上述した実施形態と第1還元ガスと第2還元ガスの供給タイミングが異なる。以下の変形例では、上述した実施形態と異なる点のみ詳述する。
本変形例では、図5に示すように、上述した第1の工程である金属含有ガス供給と、上述した第2の工程である残留ガス除去後に、第3の工程として第2還元ガスの供給を開始し、第2還元ガスの供給を開始してから所定時間経過後であって例えば1~20秒後に、第4の工程として第1還元ガスの供給を開始する。そして、第1還元ガスと第2還元ガスが同時供給されてから所定時間経過後であって例えば1~20秒後に、第2還元ガスの供給を停止し、第5の工程として第2還元ガスの供給を停止してから所定時間経過後であって例えば1~120秒後に、第1還元ガスの供給を停止する。そして、第6の工程として残留ガスの除去を行い、第1の工程~第6の工程を順に行うサイクルを少なくとも1回以上(所定回数(n回))行うことにより、ウエハ200上に、所定の厚さの金属含有膜を形成する。なお、本変形例においてもウエハ200に対する第2還元ガスの供給時間を第1還元ガスの供給時間よりも短くする。
本変形例では、図6に示すように、上述した第1の工程である金属含有ガス供給と、上述した第2の工程である残留ガス除去後に、第3の工程として第1還元ガスの供給を開始し、第1還元ガスの供給を開始してから所定時間経過後であって例えば1~60秒後に、第4の工程として第2還元ガスの供給を開始する。そして、第1還元ガスと第2還元ガスが同時供給されてから所定時間経過後であって例えば1~60秒後に、第2還元ガスの供給を停止し、第5の工程として第2還元ガスの供給を停止してから所定時間経過後であって例えば1~60秒後に、第1還元ガスの供給を停止する。つまり、第1還元ガスの供給中に第2還元ガスの供給を開始し、第2還元ガスの供給を停止する。つまり、第1還元ガスの供給を行っている間に第2還元ガスの供給を行う。言い換えれば、第1還元ガスの供給を開始した後に第2還元ガスの供給を開始し、第2還元ガスの供給を停止した後に、第1還元ガスの供給を停止する。そして、第6の工程として残留ガスの除去を行い、第1の工程~第6の工程を順に行うサイクルを少なくとも1回以上(所定回数(n回))行うことにより、ウエハ200上に、所定の厚さの金属含有膜を形成する。なお、本変形例においてもウエハ200に対する第2還元ガスの供給時間は第1還元ガスの供給時間よりも短いこととなる。
本変形例では、図7(A)及び図7(B)に示すように、第1の工程である金属含有ガス供給と、上述した第2の工程である残留ガス除去と、第3の工程として第2還元ガスの供給を行った後に、第4の工程として第1還元ガスの供給と、第5の工程として残留ガスの除去を行う。そして、第1の工程~第5の工程を順に行うサイクルを少なくとも1回以上(所定回数(n回))行うことにより、ウエハ200上に、所定の厚さの金属含有膜を形成する。すなわち、第2還元ガスの供給と第1還元ガスの供給とを並行して行わずに別々に行う。なお、図7(A)に示すように、第2還元ガスの供給と第1還元ガスの供給とは、連続して行うようにしてもよく、図7(B)に示すように、第2還元ガスの供給と第1還元ガスの供給の間に残留ガスの除去を行って処理室201内をパージしてもよい。なお、本変形例においてもウエハ200に対する第2還元ガスの供給時間を第1還元ガスの供給時間よりも短くする。
本変形例では、図8に示すように、第1の工程である金属含有ガス供給と、上述した第2の工程である残留ガス除去を行った後、第3の工程として第2還元ガスを供給する工程と、第4の工程として残留ガスを除去する工程とを行い、上記した第1の工程~第4の工程を順に行うサイクルを少なくとも1回以上(所定回数(n回))行うことにより、ウエハ200上に、所定の厚さの金属含有膜を形成する。すなわち、上述した第1還元ガスの供給を行わない。金属含有ガスとしてMoO2Cl2を用い、第2還元ガスとしてPH3を用いる場合、PH3ガスを供給することにより、MoO2Cl2の吸着層や、ClやOを含むMo含有層からOとClを除去し、上述した図4に示すシーケンスと同様の効果が得られる。
121 コントローラ
200 ウエハ(基板)
201 処理室
Claims (19)
- (a)基板を処理容器に収容する工程と、
(b)前記基板に対して金属含有ガスを供給する工程と、
(c)前記基板に対して第1還元ガスを供給する工程と、
(d)前記基板に対して前記第1還元ガスとは異なる第2還元ガスを供給する工程と、を有し、
(b)と(c)と(d)とを1回以上行うことにより、前記基板上に金属含有膜を形成する半導体装置の製造方法。 - (c)と(d)を、一部並行して行う請求項1記載の半導体装置の製造方法。
- (c)と(d)を、同時に開始する請求項1又は2記載の半導体装置の製造方法。
- (d)を終了した後に、(c)を終了する請求項3記載の半導体装置の製造方法。
- (d)を開始した後に、(c)を開始する請求項1又は2記載の半導体装置の製造方法。
- (d)を終了した後に、(c)を終了する請求項5記載の半導体装置の製造方法。
- (c)を開始した後に、(d)を開始する請求項1又は2記載の半導体装置の製造方法。
- (d)を終了した後に、(c)を終了する請求項7記載の半導体装置の製造方法。
- (d)は、(c)を行っている間に行う請求項1又は2記載の半導体装置の製造方法。
- (d)を行った後に、(c)を行う請求項1記載の半導体装置の製造方法。
- (c)の時間は、(d)の時間よりも長い請求項1から7のいずれか記載の半導体装置の製造方法。
- 前記金属含有ガスは、モリブデンと酸素と塩素を含むガスであり、
前記第1還元ガスは、水素で構成されるガスであり、
前記第2還元ガスは、水素と他の元素を含むガスである
請求項1から7のいずれか記載の半導体装置の製造方法。 - 前記金属含有ガスは、二塩化二酸化モリブデンガスである請求項12記載の半導体装置の製造方法。
- 前記第1還元ガスは、水素ガスである請求項12又は13に記載の半導体装置の製造方法。
- 前記第2還元ガスは、ホスフィンガスである請求項12記載の半導体装置の製造方法。
- 前記第2還元ガスは、ホスフィンガスである請求項13記載の半導体装置の製造方法。
- 前記第2還元ガスは、ホスフィンガスである請求項14記載の半導体装置の製造方法。
- (a)基板処理装置の処理容器に基板を収容する手順と、
(b)前記基板に対して金属含有ガスを供給する手順と、
(c)前記基板に対して第1還元ガスを供給する手順と、
(d)前記基板に対して前記第1還元ガスとは異なる第2還元ガスを供給する手順と、を有し、
(b)と(c)と(d)とを1回以上行うことにより、前記基板上に金属含有膜を形成する処理をコンピュータにより前記基板処理装置に実行させるプログラムが記録されたコンピュータ読み取り可能な記録媒体。 - 処理容器と、
前記処理容器内に基板を収容する搬送系と、
前記処理容器内に金属含有ガスを供給する金属含有ガス供給系と、
前記処理容器内に第1還元ガスを供給する第1還元ガス供給系と、
前記処理容器内に前記第1還元ガスとは異なる第2還元ガスを供給する第2還元ガス供給系と、
前記処理容器内を排気する排気系と、
(a)前記基板を前記処理容器に収容する処理と、
(b)前記基板に対して前記金属含有ガスを供給する処理と、
(c)前記基板に対して前記第1還元ガスを供給する処理と、
(d)前記基板に対して前記第2還元ガスを供給する処理と、を有し、
(b)と(c)と(d)とを1回以上行うことにより、前記基板上に金属含有膜を形成する処理を行わせるように、前記搬送系、前記金属含有ガス供給系、前記第1還元ガス供給系、前記第2還元ガス供給系及び前記排気系を制御することが可能なように構成される制御部と、
を有する基板処理装置。
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