WO2004086481A1 - 成膜装置 - Google Patents
成膜装置 Download PDFInfo
- Publication number
- WO2004086481A1 WO2004086481A1 PCT/JP2004/004076 JP2004004076W WO2004086481A1 WO 2004086481 A1 WO2004086481 A1 WO 2004086481A1 JP 2004004076 W JP2004004076 W JP 2004004076W WO 2004086481 A1 WO2004086481 A1 WO 2004086481A1
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- WIPO (PCT)
- Prior art keywords
- film forming
- substrate
- gas
- chamber
- film
- Prior art date
Links
- 230000015572 biosynthetic process Effects 0.000 title claims description 49
- 238000000137 annealing Methods 0.000 claims description 88
- 239000000758 substrate Substances 0.000 claims description 77
- 238000010438 heat treatment Methods 0.000 claims description 75
- 238000010926 purge Methods 0.000 claims description 50
- 230000007246 mechanism Effects 0.000 claims description 25
- 230000008021 deposition Effects 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 91
- 229910052751 metal Inorganic materials 0.000 abstract description 12
- 239000002184 metal Substances 0.000 abstract description 10
- 125000004429 atom Chemical group 0.000 abstract description 2
- 125000004430 oxygen atom Chemical group O* 0.000 abstract description 2
- 238000004151 rapid thermal annealing Methods 0.000 abstract 2
- 239000010408 film Substances 0.000 description 241
- 239000007789 gas Substances 0.000 description 192
- 230000008569 process Effects 0.000 description 56
- 239000010409 thin film Substances 0.000 description 37
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 36
- 238000010586 diagram Methods 0.000 description 25
- 238000000231 atomic layer deposition Methods 0.000 description 22
- 239000012535 impurity Substances 0.000 description 19
- 229910052757 nitrogen Inorganic materials 0.000 description 19
- 239000002994 raw material Substances 0.000 description 18
- 238000005192 partition Methods 0.000 description 15
- 238000001816 cooling Methods 0.000 description 14
- 239000000463 material Substances 0.000 description 11
- 229910052739 hydrogen Inorganic materials 0.000 description 9
- 150000002736 metal compounds Chemical class 0.000 description 9
- 239000001257 hydrogen Substances 0.000 description 8
- 229910044991 metal oxide Inorganic materials 0.000 description 8
- 150000004706 metal oxides Chemical class 0.000 description 8
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 238000003795 desorption Methods 0.000 description 7
- 238000009826 distribution Methods 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 6
- 238000000151 deposition Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000011109 contamination Methods 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 239000011261 inert gas Substances 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 229910052735 hafnium Inorganic materials 0.000 description 3
- 238000005224 laser annealing Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 150000004767 nitrides Chemical class 0.000 description 3
- 229910017464 nitrogen compound Inorganic materials 0.000 description 3
- 150000002830 nitrogen compounds Chemical class 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 229910052746 lanthanum Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- PDPJQWYGJJBYLF-UHFFFAOYSA-J hafnium tetrachloride Chemical compound Cl[Hf](Cl)(Cl)Cl PDPJQWYGJJBYLF-UHFFFAOYSA-J 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- DUNKXUFBGCUVQW-UHFFFAOYSA-J zirconium tetrachloride Chemical compound Cl[Zr](Cl)(Cl)Cl DUNKXUFBGCUVQW-UHFFFAOYSA-J 0.000 description 1
Classifications
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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
- H01L21/20—Deposition of semiconductor materials on a substrate, e.g. epitaxial growth solid phase epitaxy
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- 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
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- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
- H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
- H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
- H01L21/0228—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition deposition by cyclic CVD, e.g. ALD, ALE, pulsed 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
- C23C16/44—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]
- C23C16/45527—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
- C23C16/45529—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 specially adapted for making a layer stack of alternating different compositions or gradient compositions
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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
- C23C16/56—After-treatment
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- 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
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- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
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- H01L21/3141—Deposition using atomic layer deposition techniques [ALD]
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- H01L21/02107—Forming insulating materials on a substrate
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- H01L21/02175—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides characterised by the metal
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/314—Inorganic layers
- H01L21/316—Inorganic layers composed of oxides or glassy oxides or oxide based glass
- H01L21/31604—Deposition from a gas or vapour
- H01L21/31616—Deposition of Al2O3
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/314—Inorganic layers
- H01L21/316—Inorganic layers composed of oxides or glassy oxides or oxide based glass
- H01L21/31604—Deposition from a gas or vapour
- H01L21/31637—Deposition of Tantalum oxides, e.g. Ta2O5
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/314—Inorganic layers
- H01L21/316—Inorganic layers composed of oxides or glassy oxides or oxide based glass
- H01L21/31604—Deposition from a gas or vapour
- H01L21/31641—Deposition of Zirconium oxides, e.g. ZrO2
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/314—Inorganic layers
- H01L21/316—Inorganic layers composed of oxides or glassy oxides or oxide based glass
- H01L21/31604—Deposition from a gas or vapour
- H01L21/31645—Deposition of Hafnium oxides, e.g. HfO2
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/314—Inorganic layers
- H01L21/316—Inorganic layers composed of oxides or glassy oxides or oxide based glass
- H01L21/31691—Inorganic layers composed of oxides or glassy oxides or oxide based glass with perovskite structure
Definitions
- the present invention relates to a film forming apparatus capable of forming a metal compound thin film by an atomic layer deposition method.
- the high dielectric constant thin film is formed by a chemical vapor deposition (CVD) method, an ALD (Atomic LayerDeposition: atomic layer deposition) method, a sputtering method, or the like.
- CVD chemical vapor deposition
- ALD Atomic LayerDeposition: atomic layer deposition
- sputtering method or the like.
- the ALD method forms a thin film not by thermal decomposition but by chemical replacement through periodic supply of each reactant.
- excellent step coverage can be obtained as compared with a physical vapor deposition method such as a sputtering method, and a low-temperature process can be performed. Therefore, this method is promising as a method for forming a high dielectric constant thin film constituting a semiconductor device.
- Patent Document 1 Patent Document 1, etc.
- Patent Document 2 describes an apparatus for performing film formation by such an ALD method.
- This film forming apparatus realizes a process of supplying a first source gas to a substrate installed in a deposition chamber, purging the source gas, and then supplying a second source gas. is there.
- the source gas and the purge gas By alternately switching between the source gas and the purge gas at a high speed, film formation by such a process becomes possible, and film formation in which atomic layers are deposited one by one becomes possible.
- Patent Document 3 describes a film forming apparatus in which a chamber for performing a film forming process and a chamber for performing a pre-process are separately provided.
- FIG. 14 is a diagram schematically showing the structure of this ALD device. According to the document, A1 In forming the 2 [Theta] 3, it is described that desorbs hydrogen terminated silicon surface.
- This hydrogen desorption process for example, while treatment with 4 0 0 ° C or higher temperature atmosphere is performed, the deposition of A 1 2 0 3 is 3 0 0 ° about C, typical ALD apparatus Assuming that these processes are performed successively using, once the temperature of the sample is raised to 400 ° C or more, hydrogen desorption is performed, and then until the temperature of the sample falls to about 300 ° C. The film must be formed after waiting. If this series of operations is performed for each wafer, the number of processing steps in the ALD apparatus increases and the cost of the semiconductor apparatus increases.
- the film-forming apparatus shown in Fig. 14 solves these problems.
- the sample introduction chamber 13 stores the processed sample in the ALD device, and the reaction chamber forms a predetermined film on the sample. 12.
- a hydrogen desorption chamber 11 for performing the desorption of hydrogen is provided, and the hydrogen desorption is performed by the heating lamp 16 in the hydrogen desorption chamber 11. This makes it possible to continuously perform the hydrogen desorption process and the deposition of the dielectric film at different processing temperatures. In this way, by separately providing the chambers for performing the film formation process and the pre-process, the process can be performed continuously without waiting for the temperature to stabilize. It is said that the manufacturing cost of the semiconductor device can be reduced.
- All of the film forming apparatuses that perform film formation by such an ALD method have a basic configuration in which a source gas and a purge gas are alternately supplied.
- a general ALD method film forming process realized by these film forming apparatuses will be described with reference to FIG.
- an example of an aluminum oxide film will be described.
- the substrate is set in the reaction chamber, and then the film raw material A is supplied to the substrate surface.
- trimethylaluminum (A 1 (CH 3 ) 3 called “TMA” is supplied (S 101).
- the raw material A in the reaction chamber is exhausted by purging with an inert gas (S 102).
- a reactive gas is supplied to the reaction chamber (S103). Oxygen, water vapor, or the like can be used as the reactive gas.
- an atomic layer of oxygen is formed on the atomic layer of Subsequently, in order to remove by-products and reactive gas generated in the gas phase, the gas is exhausted by purging with an inert gas (S104).
- the above S101 to S104 are repeated to form a high dielectric constant thin film. Thereafter, it is confirmed whether or not the film thickness has reached a predetermined value by a film thickness measuring device provided in the film forming device (S107). After it is confirmed that the film thickness has reached a predetermined value (Yes in S107), a film quality improvement process by thermal annealing is performed (S108). This thermal annealing is performed after the layer formation is completed (Patent Document 1, paragraph 047). Thus, the film forming process is completed.
- FIG. 2 is a schematic diagram of a layer structure when a high dielectric constant thin film is formed according to the process of FIG. FIGS. 2 (a) and 2 (b) correspond to the states before and after the film quality improvement processing by the thermal annealing indicated by S108 in FIG. 1, respectively.
- the impurities are distributed throughout the high dielectric constant thin film. After annealing, impurities are removed from the entire film and the film is densified. However, impurities are not sufficiently removed in the lower part of the high dielectric constant thin film, particularly in a region near the substrate, and tend to remain. In addition, metal oxides are generally easy to crystallize, and in the state shown in FIG. 2 (b) after annealing, crystallization occurs in a part of the film. Such residual impurities and crystallization of the film may cause deterioration of characteristics of devices including the high dielectric constant thin film. For example, when a high-dielectric-constant thin film is applied to a gate insulating film of a transistor, it causes an increase in leakage current, variation in threshold characteristics, and the like.
- Patent Document 3 JP 2002-314072 A (FIG. 8) Disclosure of the Invention
- the present invention has been made in view of the above problems, and an object of the present invention is to form a film in an ALD method for suppressing contamination of impurities and defects in a film and for stably obtaining a thin film of good film quality. It is to provide a device. Another object of the present invention is to provide a film forming apparatus capable of introducing a heterogeneous component into a thin film in a desired distribution.
- a film forming apparatus configured to perform film formation by alternately supplying a source gas and a purge gas
- the film forming chamber includes: a substrate holding unit configured to hold a substrate in the film forming chamber; A source gas supply unit that supplies the source gas to the film formation chamber, a reactive gas supply unit that supplies a reactive gas to the film formation chamber, a purge gas supply unit that supplies the purge gas to the film formation chamber, An exhaust unit that exhausts the source gas, the reactive gas, and the purge gas from the film forming chamber; a first heating unit that heats the substrate disposed in the film forming chamber and maintains the substrate at a predetermined temperature; And a second heating means for rapidly heating the substrate disposed in the film formation chamber.
- a film forming apparatus includes first and second heating means for heating a substrate disposed in a film forming chamber.
- the first heating means sets the substrate at a film forming temperature at which an atomic layer is deposited. While maintaining it, rapid heating can be performed by the second heating means. Therefore, both the atomic layer deposition step and the annealing step can be performed in the same film formation chamber without removing the substrate, and the film formation can be performed by rapidly switching these steps.
- a film forming process comprising a step of performing a layer formation time was Fu c
- impurities mixed in the layer and defects of the layer can be sufficiently removed, and the film can be densified.
- an annealing gas such as ammonia is introduced in the annealing step, and a layer into which nitrogen or the like is introduced by annealing can be arbitrarily formed in the thin film.
- annealing after film formation is performed by taking out the substrate from the film forming apparatus and using another apparatus.
- atomic layer deposition and annealing can be performed in the same film forming apparatus, and the above film forming process can be stably realized.
- the source gas, the reactive gas, or the purge gas may be introduced from a direction parallel to the substrate surface.
- the purge gas is introduced into the substrate from a horizontal direction, these gases are efficiently supplied to the substrate surface, and a thin film of good film quality can be stably obtained.
- the first heating unit and the second heating unit are arranged to face each other with the substrate interposed therebetween, and the first heating unit heats the substrate from the back surface, and the second heating unit May be configured to heat the substrate from the surface. By doing so, the heating by each heating means can be performed efficiently.
- the surface on which the film is formed is referred to as the surface of the substrate.
- a configuration may be further provided with an annealing gas introduction section for introducing annealing gas into the film forming chamber.
- an annealing gas introduction section for introducing annealing gas into the film forming chamber.
- the second heating means may be an RTP (Rapid Thermal 1 Processing) device such as an infrared lamp, a laser annealing device, or a flashing device. By doing so, rapid heating of the substrate can be stably performed, and a process of sequentially repeating atomic layer deposition and annealing can be stably performed.
- the second heating means may be arranged outside the film forming chamber. By doing so, the contamination of the second heating means by the raw material gas, the reactive gas, and the like can be effectively suppressed.
- the first heating means may be, for example, a heater provided on the substrate holding surface of the substrate holding means. By doing so, the back surface of the substrate is heated by heat conduction or radiation, so that the substrate can be stably maintained at the film formation temperature.
- the present invention by adopting a configuration capable of realizing a quick purge as compared with the conventional apparatus, it is possible to rapidly cool the substrate temperature. After annealing, the substrate is quickly cooled, and the next atomic layer is cooled. It is possible to quickly switch to the deposition process. Therefore, both film formation and annealing can be performed in the same film formation chamber. Therefore, a film formation apparatus which can appropriately suppress the entry of impurities and the defect of the film can be realized. In addition, since a process of forming a layer into which nitrogen or the like is introduced by annealing at a desired position in the thin film can be performed, it is possible to reliably introduce different components into the thin film with a desired distribution. Therefore, a high-quality film having a desired component distribution can be stably formed.
- the substrate holding means may have a moving mechanism for moving the position of the substrate, and the substrate and the first substrate may be operated by an operation from outside the film formation chamber without opening the film formation chamber. It is also possible to configure so that the distance between the two heating means can be adjusted. In addition, by combining a large-flow purge gas supply unit with a corresponding exhaust unit, rapid heating and rapid cooling of the substrate can be performed more smoothly.
- the apparatus further comprises an annealing gas introduction unit for introducing annealing gas into the film forming chamber, wherein when the substrate is moved closer to the second heating means by a moving mechanism, the film is formed by the substrate or the substrate holding means.
- the chamber is divided into a first chamber provided with the annealing gas introduction section and a second chamber provided with the source gas supply section and the reactive gas supply section, and the surface of the substrate is formed in the first chamber. Exposed.
- a part of the space in the film forming chamber The neal is performed, and the temperature controllability in the rapid heating process is further improved.
- the amount of introduction can be controlled with high precision. Further, at the time of annealing, there is no need to move the substrate from the film formation chamber to another chamber for annealing, and the operation from film formation to annealing can be performed continuously in the film formation chamber.
- the durability of the film forming apparatus can be improved.
- Mixing of the annealing gas with the source gas and the reactive gas may generate corrosive gas, which may corrode the inner wall of the film forming chamber.
- generation of such corrosive gas can be suppressed, and the durability of the film forming apparatus can be improved.
- the first chamber having a closed structure may be formed by the substrate holding means and the inner wall of the film forming chamber.
- a small chamber can be easily formed in the film forming chamber with a simple configuration, and the heating by the second heating means can be performed more efficiently.
- a partition member is provided inside the film forming chamber, and when the substrate is moved closer to the second heating means by the moving mechanism, the substrate or the substrate holding means and the partition member are integrated to form a partition in the film forming chamber.
- the first and second chambers may be formed.
- the film forming apparatus further includes a control unit configured to control operations of the second heating unit and the moving mechanism, wherein the control unit moves the substrate closer to the second heating unit by the moving mechanism. After that, the heating of the substrate may be started by the second heating means. By doing so, the heating of the substrate Can be performed more efficiently.
- the film forming apparatus of the present invention further includes an annealing gas introduction unit for introducing annealing gas into the film forming chamber, and further includes a control unit that controls operations of the second heating unit, the annealing gas introduction unit, and the moving mechanism.
- the control unit starts heating the substrate by the second heating unit when the substrate is brought close to the second heating unit by the moving mechanism, and further controls the film formation chamber from the annealing gas introduction unit. May be configured to introduce anneal gas into the gas. By doing so, a high-quality film can be formed more reliably and quickly.
- the exhaust unit is also controlled by the control unit, and the entire film forming chamber can be exhausted when the moving mechanism moves the substrate away from the second heating unit. it can. By doing so, it is possible to simultaneously exhaust the entire film formation chamber including the part that becomes a small chamber when the substrate is brought close to the second heating means. Therefore, gas replacement and cooling in the film formation chamber can be performed more quickly and reliably.
- the film forming apparatus of the present invention is suitably used for forming a metal compound layer made of a high dielectric constant material called so-called high-k.
- the dielectric constant k of the thin film can be, for example, 8 or more.
- the metal compound layer is a group of Hf, Zr, Al, La, Y, Si, Ba, Sr, Ti, Pb, Bi, Ta, Nb, and Mn. And one or more elements selected from the group consisting of: Among these, it is particularly preferable to include any of Hf, Zr, Al, La and Y. By doing so, a stable film having a high dielectric constant can be obtained.
- M represents one or more metal elements. Specific examples of metal elements include those described above. Is mentioned.
- Metal nitrides such as A 1 N and H f 3 N 4 ;
- Etc. are exemplified.
- a high dielectric constant film made of a high dielectric constant material having a relative dielectric constant of 10 or more is preferable.
- Such a film can be suitably used as a gate insulating film of a MIS (Meta 1 Insul stor s ic i d u n d ct o r) type transistor-capacitance film.
- MIS Metal 1 Insul stor s ic i d u n d ct o r
- the annealing process is performed in an atmosphere containing a nitrogen compound gas, and then the step of depositing the atomic layer is further performed. It can be realized in a continuous process without any.
- a metal nitride layer or a metal oxynitride layer can be introduced at an arbitrary position in the metal compound layer made of a high dielectric constant material.
- a high-dielectric-constant film made of a metal oxide has high insulating properties, but has a property of being easily crystallized and easily leaking current.
- nitrogen when nitrogen is introduced, the film quality is improved by increasing the crystallization temperature, and the leakage current becomes difficult to flow. According to the present invention, it is possible to stably form such a film with good controllability.
- FIG. 1 is a view for explaining a conventional typical high-dielectric-constant thin film forming process by the ALD method.
- FIG. 2 is a schematic diagram of a layer structure when a high dielectric constant thin film is formed according to the process of FIG.
- FIG. 3 is a diagram showing a configuration of a film forming apparatus according to the embodiment.
- FIG. 4 is a diagram showing a configuration of a film forming apparatus according to the embodiment.
- FIG. 5 is a diagram illustrating a step of forming a high dielectric constant thin film according to the embodiment.
- FIG. 6 is a schematic diagram of a layer structure when a high dielectric constant thin film is formed according to the process of FIG.
- FIG. 7 is a diagram showing a sequence of gas supply and wafer cooling.
- FIG. 8 is a diagram showing a configuration of a film forming apparatus according to the embodiment.
- FIG. 9 is a diagram showing a configuration of a film forming apparatus according to the embodiment.
- FIG. 10 is a diagram showing a configuration of a film forming apparatus according to the embodiment.
- FIG. 11 is a diagram showing a configuration of a film forming apparatus according to the embodiment.
- FIG. 12 is a diagram showing a sequence of gas supply and wafer temperature control in the high dielectric constant thin film forming method according to the embodiment.
- FIG. 13 is a diagram showing a sequence of gas supply and temperature control in the high dielectric constant thin film forming method according to the embodiment.
- FIG. 14 is a diagram showing a configuration of a conventional film forming apparatus.
- FIG. 15 is a diagram for explaining a method of process management in the film forming apparatus according to the embodiment.
- FIG. 16 is a diagram for explaining a method of process management in the film forming apparatus according to the embodiment.
- BEST MODE FOR CARRYING OUT THE INVENTION First embodiment
- FIG. 3 is a diagram illustrating a configuration of a film forming apparatus according to the present embodiment.
- the Si wafer 206 is mounted on a mounting table 268 provided with a heater 208.
- the mounting table 268 is supported by the support portion 214.
- the the device the reactive gas (H 2 0), the raw material to become gas and inlet par purge gas of the metal compound is provided.
- An exhaust port for exhausting gas in the film forming chamber is provided on the right side of the apparatus.
- a quartz force par 258 is provided in order to prevent gas components from adhering to the mounting table 268 and the support portion 214.
- An RTP device 202 is installed above a quartz window 204 provided on the wall surface of the film forming chamber 211.
- the Si wafer 206 is maintained at a predetermined temperature during film formation by the heater 208, and is The device 202 is rapidly heated. That is, the heater 208 is a heat source for maintaining a predetermined film forming temperature, that is, a film forming temperature in FIG. 7B described later when forming a film on the Si wafer 206.
- the device 202 is a heat source for achieving an annealing temperature during the thermal annealing.
- a rapid temperature rising / falling heat treatment device such as an infrared lamp, a laser annealing device, or flashing can be used.
- the ratio of the volume of the film forming chamber 216 to the flow rate of the purge gas is remarkably smaller than before, the inside of the film forming chamber 216 is cooled by a large flow of the purge gas for cooling in a short time. Is replaced by This makes it possible to rapidly lower the temperature in the film forming chamber 2 16. Further, since the RTP device 202 is attached to the film forming device 200, a rapid temperature rise is possible.
- FIG. 4 is a diagram showing the configuration of the film forming apparatus 200 in more detail, and shows the configuration of a pipe connected to the film forming chamber 216.
- a valve 238 and a valve 240 are provided in a raw material gas supply pipe 222 for supplying a gas as a raw material of the metal compound thin film to the film forming chamber 2 16.
- the raw material gas supply pipe 222 is connected to a tank or a cylinder for storing the raw material gas.
- the purge gas supply pipe 224 communicating with the source gas supply pipe 222 Pulp 2 4 2 is provided.
- the source gas may be a source material for a high dielectric constant film (high-k source material). By doing so, a metal compound thin film having a high dielectric constant can be suitably formed on the surface of the Si wafer 206.
- the film formation chamber 2 1 6 reactive gas (H 2 0) Valve 2 4 4 The reactive gas supply pipe 2 2 6 for supplying, and the valve 2 4 6 are provided, the reactive It is connected to a gas storage tank or cylinder.
- the purge gas supply pipe 228 communicating with the reactive gas supply pipe 226 is provided with a valve 248. Further, a valve 250 is provided in a purge gas supply pipe 230 for introducing a large amount of cooling purge gas into the film forming chamber 216.
- the materials of the source gas supply pipe 222, the purge gas supply pipe 222, the reactive gas supply pipe 226, the purge gas supply pipe 228, and the purge gas supply pipe 230 are as follows. There is no particular limitation as long as the pipe has resistance to gas components flowing through the pipe and its temperature. For example, a stainless steel pipe can be used. Further, each of the valves 238 to 250 may be controlled by, for example, a combo (not shown) to open and close.
- the material of the wall surface of the film forming chamber 216 is not particularly limited as long as it has resistance to heat, an oxidizing agent, and a reducing agent.
- a metal such as stainless steel can be used.
- the outer wall of the film forming chamber 2 16 may be provided with a heat retaining capacity 210.
- a material of the heat retaining power 210 for example, glass wool can be used.
- the Si wafer 206 is set in the film forming chamber 2 16, and then the raw material A for the film is introduced into the film forming chamber 2 16 from the raw material gas supply pipe 222 and the Si wafer 206 is set. Supply to the surface (S101). At this time, the valve 238 and the valve 240 are opened, and the valve 242 is closed.
- Raw material A is a metal compound. For example, when forming an aluminum oxide layer, it is trimethyl aluminum (TMA).
- TMA trimethyl aluminum
- Z r 0 2 used to select the raw material gas such as zirconium chloride (Z r C 1 4) as appropriate.
- hafnium tetrachloride H f C 1 4
- H f (i OP r) 4 hafnium Pro Boki Sid
- the temperature of the Si wafer 206 during film formation is adjusted by the heater 208, and the temperature of the heater 208 is measured by the temperature measuring means 256.
- a reactive gas is supplied from the reactive gas supply pipe 226 to the film forming chamber 216 (S103).
- the valves 244 and 246 are opened and the valve 248 is closed.
- the reactive gas for example H 2 0, it can be used ⁇ 3, 0 2, N 2 0 , NH 3, NO , and the like.
- an atomic layer of oxygen is formed on the atomic layer made of the raw material A.
- the gas is exhausted by purging with an inert gas in order to remove the reactive gas and generated by-products in the gas phase (S104).
- the valve 244 is closed, the valve 248 is opened, and the purge gas is introduced from the purge gas supply pipe 228.
- the reactive gas in the reactive gas supply pipe 226 can be suitably removed.
- thermal annealing (S105, S106). This annealing is performed inside the film forming chamber 216 in which S101 to S105 are performed. That is, thermal annealing is performed without taking out the Si wafer 206 from the film forming chamber 211.
- the annealing temperature is appropriately set according to the film material and the like, but usually, a suitable temperature is selected from the range of 400 to 10000C.
- the heating temperature of the RTP device 202 is adjusted based on the temperature measured by the radiation thermometer 254.
- the cycle consisting of S101 to S106 is repeated to build up atomic layers. Thereafter, it is checked whether or not a predetermined film thickness has been reached by a film thickness measuring device (not shown) provided in the film forming device 200 (S107). If the film thickness has not reached the predetermined value (No in S107), after annealing, C) Cool 206 rapidly and repeat the steps from S101.
- the rapid cooling of the film forming chamber 2 16 is performed by supplying the purge gas from the purge gas supply pipe 230 and exhausting the gas from the exhaust port. In this way, efficiently
- the i-wafer 206 is cooled, and after S106, the process can be promptly moved to S101. If it is confirmed in S107 that the film thickness has reached the predetermined thickness (Yes in S107), the atomic layer forming process is completed, and an annealing process for improving film quality is performed (S108). .
- FIG. 6 is a diagram schematically showing a state of a process of stacking atomic layers according to the process of FIG.
- FIG. 6A shows a state where steps S101 to S104 in FIG. 5 have been executed. Metal atoms, oxygen atoms and impurities are deposited on the substrate.
- FIG. 6B shows a state where steps S105 to S106 in FIG. 5 are executed. The heat layer removes impurities from the film.
- FIGS. 6 (c) and 6 (d) show the layer structure at the stage where the above procedure was repeated. Figure by heat annealing
- FIG. 7A is a diagram showing a sequence of gas supply and wafer cooling.
- a reactive gas is supplied (Sequence 2).
- an anneal is performed to remove impurities and to densify the film (Sequence 3).
- the Si wafer 206 is cooled (sequence 4), and the one-cycle film forming process is completed. By performing this cycle a plurality of times, a high dielectric constant thin film is formed.
- FIG. 7 (b) is a diagram showing the relationship between this cycle and the Si wafer 206 temperature and gas flow rate.
- the numbers in the film forming sequence in FIG. 7 (b) match those in FIG. 7 (a).
- the wafer temperature is kept relatively low.
- the temperature is rapidly increased by the RTP device 202 to perform an annealing process in the film forming sequence 3 (impurity removal and densification).
- the wafer temperature is maintained at a high temperature.
- Anil The treatment is performed by infrared lamp or laser annealing, and is completed in a short time.
- sequence 4 of the Si wafer 206 cooling is executed.
- the temperature of the Si wafer 206 is quickly raised without taking the Si wafer 206 out of the film forming chamber 206, annealing is performed, and the next film forming step is performed. It is important to rapidly lower the temperature of the Si wafer 206 so as not to hinder the operation. This was difficult to achieve with a conventional film forming apparatus, but since the film forming apparatus 200 is equipped with a heater 208 and an RTP apparatus 202, the RTP apparatus 20 High speed heating by 2 is possible. Further, since the introduction speed of the purge gas from the purge gas supply pipe 230 and the exhaust speed of the purge gas from the exhaust port are significantly higher than those of the conventional apparatus, rapid cooling is also possible.
- the temperature of the Si wafer 206 can be quickly raised and cooled, and both the film formation and the annealing can be realized in the film forming chamber 214. Can be.
- the film formation and the annealing can be performed at a desired timing, so that different components can be introduced into the thin film with a desired distribution.
- FIG. 8 and FIG. 9 are diagrams illustrating the configuration of the film forming apparatus according to the present embodiment.
- FIG. 8 shows a state in which the support portion 214 of the film forming apparatus 260 is raised
- FIG. 9 shows a state in which the support portion 214 is lowered.
- the Si wafer 206 is placed on a support portion 214 having a moving mechanism 212 so that the position can be moved in the height direction.
- the moving mechanism 2 12 has, for example, a structure in which the supporting section 2 14 is electrically extended and contracted, and the height of the supporting section 2 14 is changed by a switch provided outside the film forming chamber 2 16. 1 2 as support 2 1 4 inside Can be provided.
- the Si wafer 206 is moved upward as shown in FIG.
- the Si wafer 206 is moved to the lower part, moved away from the RTP device 202, and introduced from the purge gas supply pipe 230.
- the room is cooled by a large amount of purge gas.
- an exhaust port is provided above the film forming chamber 214.
- the structure of the mounting table 268 and the supply path of each gas are the same as those shown in FIG.
- the film forming apparatus 260 is configured so that the distance between the RTP apparatus 202 and the Si wafer 206 can be adjusted, and the exhaust port is located above the film forming chamber 2 16. This makes it possible to quickly perform gas exchange and temperature control, making the structure more suitable for rapid heating and rapid cooling.
- the distance between the RTP device 202 and the Si wafer 206 during heating is appropriately selected according to the output of the RTP device 202 and the like.
- FIG. 10 and FIG. 11 are diagrams illustrating the configuration of the film forming apparatus according to the present embodiment.
- FIG. 10 shows a state in which the support section 214 of the film forming apparatus 262 is raised
- FIG. 11 shows a state in which the support section 214 is lowered.
- the Si wafer 206 is mounted on a support portion 214 provided with a moving mechanism 212.
- the position can be moved in the height direction.
- the partition plate 264 is provided at a position lower than the inlet for the annealing gas and higher than the inlets for the other gases.
- an upper part of the film forming chamber 216 is provided with an exhaust gas for exhausting a purge gas or an anneal gas.
- the mouth 2 6 6 is provided.
- the anneal gas exhaust port is provided above the partition plate 264.
- the Si wafer 206 is moved by the moving mechanism 2 12, and the Si wafer 206 on the quartz cover 250, the support portion 214 and the support portion 214 are separated from the partition plate 260.
- the partition walls are integrally formed in the film forming chamber 216, whereby two small chambers are formed in the film forming chamber 216.
- a small chamber for annealing is suitably formed in the film forming chamber 216 by the partition plate 264.
- the side surface of the partition plate 264 contacts the side surface of the Si wafer 206 or the side surface of the mounting table 268. Adjust the moving mechanism 2 1 2 so that In this way, the supply and discharge of the anneal gas are performed only to the small chamber above the partition plate 264, and the flow of the anneal gas into the chamber below the partition plate 264 is shut off. By doing so, corrosion of the inner wall of the film formation chamber 216 due to contact between the anneal gas and the reactive gas in the film formation chamber 216 can be suitably suppressed.
- NH 3 which is a reducing gas
- H 20 which is the oxidizing gas
- corrosion of the inner wall may progress, but the provision of the partition plate 264 can suppress this.
- an oxidizing gas is selected as the annealing gas
- a reducing gas is selected as the reactive gas.
- the anneal gas can be supplied more efficiently.
- the Si wafer 206 is close to the RTP device 202 and can be heated more rapidly.
- the moving mechanism 21 is set so that the Si wafer 206 is located at a position lower than the purge gas inlet. Adjust 2. At this time, the air is exhausted from two places, the anneal gas exhaust port 266 provided in the upper part of the film forming chamber 216 and the exhaust port in the lower part of the film forming chamber 216, so that the cooling is more efficiently performed. It can be carried out. This allows for a more rapid temperature drop.
- the side surface of the partition plate 264 is configured to be in contact with the side surface of the Si wafer 206 or the side surface of the mounting table 268, but there is a predetermined gap. You may.
- FIG. 15 is a diagram for explaining a method of process management in the above-described film forming apparatus.
- the process management unit 270 manages the schedule of each process based on the time information input from the clock unit 272. This schedule management will be described with reference to the flow chart of FIG. 5 using the film forming apparatus 260 described in the second embodiment as an example.
- the source gas control unit 276 controls the supply amount of the source gas from the source gas supply pipe 222 (S101). Note that the temperature of the heater 208 in the film forming process is controlled by the heater control unit 286.
- the source gas control unit 276 stops supplying the source gas, and the exhaust control unit 288 forms a film from the exhaust port.
- the chamber 216 is evacuated (S102). After a lapse of a predetermined time, the exhaust is stopped.
- a reactive gas is supplied from the reactive gas supply pipe 226 for a predetermined time (S103).
- the supply of the reactive gas is controlled by the reactive gas control unit 278. It is.
- the reactive gas control unit 278 stops the supply of the reactive gas, and the exhaust control unit 288 evacuates the film formation chamber 2 16 (S 104). After a lapse of a predetermined time, the exhaust is stopped.
- the moving mechanism control unit 274 operates the moving mechanism 212 for a predetermined time to bring the Si wafer 206 closer to the RTP device 202.
- the RTP control unit 284 starts heating by the RTP device 202, and the anneal gas control unit 280 supplies an annealing gas from the anneal gas supply pipe 218 to the film formation chamber 216 for a certain period of time (S 105).
- the purge gas control unit 282 starts the supply of the purge gas from the purge gas supply pipe 230, and the exhaust control unit 288 exhausts the exhaust gas from the exhaust port. To start. The above operation is repeated until a predetermined time.
- the film quality improvement processing is performed similarly to S105, and the film formation is completed.
- Each of the above sequences is managed by the process management unit. Further, the sequence shown in FIG. 7 can also be performed based on the method of the present embodiment.
- a schedule may be set such that anneal gas is supplied at a predetermined timing after the start of heating of the RTP device 202.
- FIG. 16 is a view for explaining another method of process management in the above-described film forming apparatus.
- the moving mechanism control unit 274 controls the operation of the moving mechanism 212, while controlling the annealing gas based on the position of the substrate 206 grasped by the substrate position grasping unit 290.
- the operation of the block 280 and the RTP control block 284 is controlled. For this reason, when the Si wafer 206 moves to a predetermined position, the RTP control unit 284 starts heating by the RTP device 202 and controls the annealing gas.
- Section 280 initiates the supply of anneal gas supply pipe 218. At this time, the schedule may be such that the supply of the anneal gas is started after the heating by the RTP device 202 is performed for a predetermined time.
- the sequence shown in FIG. 7 may be performed based on the method of the present embodiment.
- This embodiment relates to another example of the film forming method using the film forming apparatus 260 (FIGS. 8 and 9) described in the second embodiment.
- an example is shown in which an annealing treatment is performed in an atmosphere containing a nitrogen compound gas to diffuse nitrogen into the metal compound layer.
- the RTP device 202 is an infrared lamp.
- Figure 12 shows the gas supply and temperature profile in the film formation process. This profile can be executed, for example, by the method described in the fourth embodiment or the fifth embodiment.
- the raw material gas trimethylaluminum (TMA) is introduced to form an aluminum atomic layer.
- H 20 gas is introduced as a reactive gas to form an oxygen atomic layer.
- the temperature at the time of forming the aluminum atomic layer and the oxygen atomic layer is about 200 ° C. to 450 ° C.
- a thermal annealing process for removing impurities and densifying the film is performed.
- the annealing temperature and time are, for example, 600 ° C. to 150 ° C.
- the heating rate during annealing should be 10 O ⁇ Z sec or more.
- the above-described series of steps is repeated a predetermined number of times, and a metal oxide layer is laminated. After that, when a predetermined thickness is reached, a nitrogen introduction treatment is performed. That is, as shown in FIG. 12, NH 3 is supplied during the annealing process. This allows nitrogen to Introduced and diffused in layers.
- the annealing conditions at this time are the same as those described above.
- a high dielectric constant thin film in which A1 ⁇ and A1ON are stacked in this order can be formed.
- the amount of nitrogen introduced can be highly controlled by adjusting the annealing conditions and the like. Also, a desired nitrogen concentration distribution can be stably formed in the high dielectric constant thin film. .
- the film quality is improved by increasing the crystallization temperature, and the chemical stability is improved.
- it has properties such as a low barrier against electrons and trapping electrons. Therefore, when introducing nitrogen into the metal oxide film, if the nitrogen concentration can be distributed and the high nitrogen concentration region and the low nitrogen concentration region can be provided, unprecedented superior device performance may be realized. .
- the method of the present embodiment can precisely control such a nitrogen concentration distribution, and thus can be suitably used in a device manufacturing process.
- the film forming apparatus 260 is used in the present embodiment, a film forming apparatus 200 or a film forming apparatus 262 may be used.
- an example in which an annealing process is performed every time an atomic layer is formed has been described.
- a method of performing an annealing process after stacking a plurality of atomic layers is adopted.
- A1 O and A1ON are stacked in this order on a silicon substrate using the ALD method.
- the film forming apparatus for example, the film forming apparatus 260 (FIGS. 8 and 9) described in the second embodiment is used.
- FIG. 13 shows the gas supply and temperature profile in the film formation process. This profile can be executed, for example, by the method described in the fourth embodiment or the fifth embodiment.
- a source gas trimethylaluminum (TMA)
- TMA trimethylaluminum
- H 20 gas is introduced as a reactive gas to form an oxygen atomic layer (Step B).
- the temperature at the time of film formation of aluminum and oxygen is about 150 to 450 ° C.
- Steps A and B are performed 2 to 5 cycles to form an A 1 O layer.
- the annealing temperature and time are, for example, 600 ° C. to 150 ° C. and 1 second to 600 seconds.
- the heating rate during annealing is 100 ° CZ sec or more (Step C).
- step D a nitrogen compound gas is introduced into the film forming chamber.
- ammonia is introduced.
- nitrogen is introduced into the aluminum oxide layer, and an A1ON layer is formed.
- the film forming apparatus 260 is used in the present embodiment, a film forming apparatus 200 or a film forming apparatus 262 may be used.
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Abstract
Description
Claims
Priority Applications (2)
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US10/550,753 US7387686B2 (en) | 2003-03-25 | 2004-03-24 | Film formation apparatus |
EP04722958A EP1608006A4 (en) | 2003-03-25 | 2004-03-24 | FILM PRODUCTION DEVICE |
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JP2003083692A JP4257576B2 (ja) | 2003-03-25 | 2003-03-25 | 成膜装置 |
JP2003-083692 | 2003-03-25 |
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WO2004086481A1 true WO2004086481A1 (ja) | 2004-10-07 |
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PCT/JP2004/004076 WO2004086481A1 (ja) | 2003-03-25 | 2004-03-24 | 成膜装置 |
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US (1) | US7387686B2 (ja) |
EP (1) | EP1608006A4 (ja) |
JP (1) | JP4257576B2 (ja) |
KR (1) | KR20050109601A (ja) |
TW (1) | TW200420747A (ja) |
WO (1) | WO2004086481A1 (ja) |
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- 2004-03-24 WO PCT/JP2004/004076 patent/WO2004086481A1/ja active Application Filing
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Also Published As
Publication number | Publication date |
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JP4257576B2 (ja) | 2009-04-22 |
JP2004296537A (ja) | 2004-10-21 |
TW200420747A (en) | 2004-10-16 |
US7387686B2 (en) | 2008-06-17 |
KR20050109601A (ko) | 2005-11-21 |
EP1608006A1 (en) | 2005-12-21 |
EP1608006A4 (en) | 2007-01-31 |
US20060180082A1 (en) | 2006-08-17 |
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