KR100859115B1 - 산화막 형성방법 및 장치 - Google Patents
산화막 형성방법 및 장치 Download PDFInfo
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- KR100859115B1 KR100859115B1 KR1020077003069A KR20077003069A KR100859115B1 KR 100859115 B1 KR100859115 B1 KR 100859115B1 KR 1020077003069 A KR1020077003069 A KR 1020077003069A KR 20077003069 A KR20077003069 A KR 20077003069A KR 100859115 B1 KR100859115 B1 KR 100859115B1
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- Prior art keywords
- ozone
- gas
- substrate
- oxide film
- containing gas
- Prior art date
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- 238000000034 method Methods 0.000 title claims description 133
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 238
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 29
- 229910052751 metal Inorganic materials 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 27
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 22
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- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 description 9
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- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 6
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- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—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]
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/40—Oxides
- C23C16/401—Oxides containing silicon
- C23C16/402—Silicon dioxide
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
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- C23C16/40—Oxides
- C23C16/403—Oxides of aluminium, magnesium or beryllium
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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
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- C23C16/40—Oxides
- C23C16/405—Oxides of refractory metals or yttrium
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/40—Oxides
- C23C16/407—Oxides of zinc, germanium, cadmium, indium, tin, thallium or bismuth
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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
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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
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- 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
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Abstract
Description
기판 온도(℃) | 300 | 300 | 300 | 200 | 200 |
원료가스 압력(Pa) | 10 | 50 | 150 | 10 | 50 |
에칭 속도(㎚/분) | 37 | 41 | 43 | 50 | 62 |
실시예 | 비교예 | ||||||
1 | 2 | 3 | 4 | 5 | 6 | 열산화막 | |
막 형성온도(℃) | 300 | 300 | 300 | 200 | 200 | 200 | |
헥사메틸디실라잔 원료물질 압력(Pa) | 10 | 50 | 150 | 5 | 10 | 50 | |
피크 위치(㎝-1) | 1063 | 1065 | 1065 | 1066 | 1067 | 1067 | 1080 |
반치 폭(㎝-1) | 75 | 70 | 66 | 75 | 71 | 85 | 75 |
Si-OH/Si-O-Si 신호 강도 | 0 | 0.05 | 0.136 | 0.05 | 0.205 | 0.461 | 0 |
Claims (21)
- Si(실리콘)-O(산소) 결합 또는 Si(실리콘)-C(탄소) 결합을 갖는 유기실리콘 또는 금속원소-산소 결합 또는 금속원소-탄소 결합을 갖는 유기금속을 포함하는 원료가스와 오존함유가스를 기판에 교대로 공급하여 상기 기판의 표면에 산화막을 형성시키되, 상기 기판의 온도를 실온 내지 400℃로 조절하고, 상기 오존함유가스의 오존의 농도를 0.1 내지 100용적%의 범위로 조절하며, 상기 원료가스와 상기 오존함유가스를 교대로 공급하는 하나의 사이클(cycle)에서 원료가스의 도입압력은, 상기 원료가스 내에 하나의 실리콘원자가 포함되어 있는 경우 0.1 내지 100Pa이고, 상기 원료가스 내에 n개의 실리콘원자가 포함되어 있는 경우 상기 도입압력 범위의 1/n의 상한을 갖는 것을 특징으로 하는 산화막 형성방법.
- 삭제
- 제 1 항에 있어서,상기 원료가스에 대하여 상기 오존함유가스가 적어도 상기 원료가스 내에 포함된 상기 유기실리콘 또는 유기금속 전부를 실리콘산화물 또는 금속산화물로 산화시키기 위한 화학당량에 대응하는 양으로 공급되는 것을 특징으로 하는 상기 산화막 형성방법.
- 제 3 항에 있어서,상기 오존함유가스를 공급한 후 상기 기판과 원료가스와 오존함유가스와의 닫힌 반응계에서 잔류하는 오존의 열분해에 의한 압력상승을 확인할 수 있을 정도의 양으로 상기 오존함유가스의 공급량을 설정하는 것을 특징으로 하는 상기 산화막 형성방법.
- 제 1 항에 있어서,상기 원료가스와 상기 오존함유가스를 교대로 공급하는 각 사이클에 있어서, 상기 기판 온도가 낮아지면, 1 사이클 당 막 형성속도가 낮아지는 것을 특징으로 하는 상기 산화막 형성방법.
- 제 5 항에 있어서,상기 막 형성속도가 200℃의 기판 온도에서 0.2 내지 1.0㎚/사이클인 것을 특징으로 하는 상기 산화막 형성방법.
- 제 5 항에 있어서,상기 막 형성속도가 300℃의 기판 온도에서 0.2 내지 5.0㎚/사이클인 것을 특징으로 하는 상기 산화막 형성방법.
- 제 1 항에 있어서,상기 원료가스 및 상기 오존함유가스가 교대로 상기 기판에 공급되는 경우, 상기 기판에 자외선광을 조사하는 것을 특징으로 하는 상기 산화막 형성방법.
- 제 8 항에 있어서,상기 기판 상에 자외선광을 조사하면서 상기 원료가스와 상기 오존함유가스를 교대로 공급하여 상기 기판의 표면에 산화막을 형성하는 반응기가 제공되고, 상기 반응기에 설치된 자외선광조사창으로부터 상기 기판까지의 거리가 오존 분압에 의해 흡수되는 도입 자외선광의 흡수깊이보다 짧아지도록 조절하는 것을 특징으로 하는 상기 산화막 형성방법.
- 제 1 항에 있어서,상기 반응기는 저압콜드월 방식 또는 핫 월 방식인 것을 특징으로 하는 상기 산화막 형성방법.
- 제 1 항에 있어서,상기 기판이 폴리실리콘-계열의 재질인 경우, 상기 원료가스 및 상기 오존함유가스를 상기 기판에 교대로 공급하기 전에, 일정한 기판 온도에서 상기 기판에 상기 오존함유가스를 일정한 유량 및 일정한 시간 동안 공급하여 상기 기판에 열산화막을 형성시키는 것을 특징으로 하는 상기 산화막 형성방법.
- 제 11 항에 있어서,상기 열산화막이 형성되는 동안, 상기 기판에 자외선광을 조사하는 특징으로 하는 상기 산화막 형성방법.
- Si(실리콘)-O(산소) 결합 또는 Si(실리콘)-C(탄소) 결합을 갖는 유기실리콘 또는 금속원소-산소 결합 또는 금속원소-탄소 결합을 갖는 유기금속을 포함하는 원료가스와 오존함유가스를 기판에 교대로 공급하여 상기 기판의 표면에 산화막을 형성시키는 산화막 형성장치에 있어서,상기 기판을 지지하는 히터유닛을 구비한 반응기;상기 반응기 내로 상기 원료가스를 공급하기 위한 원료가스도입밸브가 구비된 배관;상기 반응기 내로 상기 오존함유가스를 공급하기 위한 오존함유가스도입밸브가 구비된 배관; 및상기 반응기 내의 가스를 배출하기 위한 배기밸브가 구비된 배관; 들을 포함하여 이루어지되,상기 원료가스도입밸브, 상기 오존함유가스도입밸브 및 상기 배기밸브가 개폐 동작을 교대로 수행하여 상기 반응기 내로 상기 원료가스 및 상기 오존함유가스를 공급하고, 상기 오존함유가스도입밸브는 상기 오존함유가스의 오존농도를 0.1 내지 100용적%의 범위 내에서 조절하고, 상기 히터유닛은 상기 기판의 온도를 실온 내지 400℃의 범위 내에서 조절하며,상기 원료가스와 상기 오존함유가스를 교대로 공급하는 하나의 사이클(cycle)에서 원료가스의 도입압력은, 상기 원료가스 내에 하나의 실리콘원자가 포함되어 있는 경우 0.1 내지 100Pa이고, 상기 원료가스 내에 n개의 실리콘원자가 포함되어 있는 경우에 상기 원료가스의 상기 도입 압력 범위의 1/n의 상한으로 갖도록 상기 원료가스도입밸브와 배기밸브의 상기 개폐 동작이 조절되는 것을 특징으로 하는 산화막 형성장치.
- 삭제
- 제 13 항에 있어서,상기 오존함유가스가 적어도 상기 원료가스 내에 포함된 상기 유기실리콘 또는 유기금속을 모두 실리콘산화물 또는 금속산화물로 산화시킬 수 있는 화학당량에 대응하는 양으로 공급되도록 상기 오존함유가스도입밸브의 개폐 동작이 조절되는 것을 특징으로 하는 상기 산화막 형성장치.
- 제 15 항에 있어서,상기 오존함유가스를 공급한 후, 상기 기판, 원료가스 및 오존함유가스와의 닫힌 반응계에서 잔류하는 오존의 열분해에 의한 압력상승을 확인할 수 있는 정도의 양으로 상기 오존함유가스의 공급량이 설정되도록 상기 오존함유가스도입밸브의 개폐동작을 수행하는 것을 특징으로 하는 상기 산화막 형성장치.
- 제 13 항에 있어서,상기 원료가스와 상기 오존함유가스를 교대로 공급하는 각 사이클에 있어서, 상기 기판 온도가 낮아질수록 1사이클 당 막 형성속도가 낮아지도록 상기 원료가스도입밸브, 상기 오존함유가스도입밸브 및 상기 배기밸브의 개폐 동작을 수행하는 것을 특징으로 하는 상기 산화막 형성장치.
- 제 17 항에 있어서,상기 막 형성속도가 200℃의 기판 온도에서 0.2 내지 1.0㎚/사이클인 것을 특징으로 하는 상기 산화막 형성장치.
- 제 17 항에 있어서,상기 막 형성속도가 300℃의 기판 온도에서 0.2 내지 5.0㎚/사이클인 것을 특징으로 하는 상기 산화막 형성장치.
- 제 13 항에 있어서,상기 반응기는 상기 기판에 자외선광을 조사하기 위한 광원 및 상기 조사된 자외선광을 투과하는 자외선광조사창을 구비하는 것을 특징으로 하는 상기 산화막 형성장치.
- 제 20 항에 있어서,상기 히터유닛은 상기 자외선광조사창으로부터 상기 기판까지의 거리가 오존 분압에 의해 흡수되는 도입 자외선광의 흡수깊이보다 짧아지도록 상기 기판의 위치가 조절되는 것을 특징으로 하는 상기 산화막 형성장치.
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