KR100542736B1 - 원자층 증착법을 이용한 산화막의 형성방법 및 이를이용한 반도체 장치의 캐패시터 형성방법 - Google Patents
원자층 증착법을 이용한 산화막의 형성방법 및 이를이용한 반도체 장치의 캐패시터 형성방법 Download PDFInfo
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- KR100542736B1 KR100542736B1 KR1020030052909A KR20030052909A KR100542736B1 KR 100542736 B1 KR100542736 B1 KR 100542736B1 KR 1020030052909 A KR1020030052909 A KR 1020030052909A KR 20030052909 A KR20030052909 A KR 20030052909A KR 100542736 B1 KR100542736 B1 KR 100542736B1
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- H—ELECTRICITY
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—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
- H01L21/02112—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
- H01L21/02172—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
- 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
- H01L21/02181—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 the material containing hafnium, e.g. HfO2
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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
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- 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
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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
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- H—ELECTRICITY
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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
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- H01L21/02178—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 the material containing aluminium, e.g. Al2O3
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- H01L21/022—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 the layer being a laminate, i.e. composed of sublayers, e.g. stacks of alternating high-k metal oxides
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- 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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- H—ELECTRICITY
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- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02296—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer
- H01L21/02299—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer pre-treatment
- H01L21/02304—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer pre-treatment formation of intermediate layers, e.g. buffer layers, layers to improve adhesion, lattice match or diffusion barriers
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Abstract
Description
공정 조건 | 평판 실리콘 | 높은 어스팩트비를 갖는 구조물 | 패턴 로딩율(%) |
Hf(OtBu)4+ O3, 300℃ | y=0.25x | y=0.125x | 50% |
TEMAH(100℃) + O3, 250℃ | y=1.01x | y=0.75x | 26% |
TEMAH(100℃) + O3, 200℃ | y=0.98x | y=0.633x | 35% |
Claims (29)
- 기판 표면을, 금속(M) 및 상기 금속과 결합하는 아미노기(X)를 포함하고 화학식 MXn으로 표현되는 전구체에 노출하여 상기 기판 표면 상에 화학적으로 흡착된 전구체막을 형성하는 단계; 및상기 화학적으로 흡착된 전구체막을 산화제로 산화하여 상기 기판 표면 상에 금속 산화막을 형성하는 단계를 포함하여 형성되고,상기 금속(M)은 원소 주기율표에서 2족, 란탄 계열을 포함하는 3A족, 4A족, 5A족, 3B족, 4B족 및 5B족 원소로 이루어진 그룹으로부터 선택되는 어느 하나의 금속 원소이고,상기 아미노기(X)는 -NR1R2 으로서 상기 R1 및 상기 R2 는 수소 원자 또는 탄소 원자의 수가 1 개 내지 4 개인 알킬기 중에서 독립적으로 선택되고,상기 n은 2, 3, 4 또는 5의 정수인 것을 특징으로 하는 산화막의 형성방법.
- 삭제
- 제1항에 있어서, 상기 M은 Sr, Ba, Y, La, Ti, Zr, Hf, V, Nb, Ta, Al, Pb, Sn 및 Bi로 이루어진 그룹으로부터 선택된 어느 하나의 원소인 것을 특징으로 하는 산화막의 형성방법.
- 제3항에 있어서, 상기 M은 하프늄인 것을 특징으로 하는 산화막의 형성방법.
- 제1항에 있어서, 상기 전구체는 TEMAH, TDEAH, TDMAH, Hf[N(C3H7)2]4, Hf[N(C4H9)2]4, Ti[N(CH3)C2H5]4, Zr[N(CH3)C2H5]4, Sn[N(CH3)C2H5]4, Ta[N(CH3)C2H5]5, Al[N(CH3)C2H5]3 및 (CH3)2AlNH2로 이루어진 그룹으로부터 선택되는 적어도 하나인 것을 특징으로 하는 산화막의 형성방법.
- 제1항에 있어서, 상기 산화제는 H2O2, H2O, O3, N2O, NO2, 플라즈마 O2, 리모트 플라즈마 O2 및 플라즈마 N2O로 이루어진 그룹에서 선택되는 적어도 하나의 산화제인 것을 특징으로 하는 산화막의 형성방법.
- 제6항에 있어서, 상기 산화제는 O3인 것을 특징으로 하는 산화막의 형성방법.
- (a) 챔버 내부에 반도체 기판을 위치시키는 단계;(b) 금속(M) 및 상기 금속과 결합하는 아미노기(X)를 포함하고 화학식 MXn으로 표현되는 전구체의 일부분이 상기 반도체 기판 상에 화학적으로 흡착하고 전구체막을 형성하게 하는 조건하에서 상기 챔버 내부에 상기 전구체의 일정량을 도입하는 단계;(c) 상기 전구체막을 구성하지 않는 전구체의 일정량의 실질적으로 모든 부분을 상기 챔버로부터 제거하는 단계;(d) 상기 챔버 내부에 산화제의 일정량을 도입하는 단계;(e) 상기 산화제의 일부와 상기 전구체막을 반응시켜 상기 기판 상에 원자층 단위의 금속 산화물 박막을 형성하는 단계; 및(f) 반응하지 않은 산화제를 상기 챔버로부터 제거하는 단계를 포함하고,상기 금속(M)은 원소 주기율표에서 2족, 란탄 계열을 포함하는 3A족, 4A족, 5A족, 3B족, 4B족 및 5B족 원소로 이루어진 그룹으로부터 선택되는 어느 하나의 금속 원소이고,상기 아미노기(X)는 -NR1R2 으로서 상기 R1 및 상기 R2 는 수소 원자 또는 탄소 원자의 수가 1 개 내지 4 개인 알킬기 중에서 독립적으로 선택되고,상기 n은 2, 3, 4 또는 5의 정수인 것을 특징으로 하는 산화물 박막의 형성방법.
- 제8항에 있어서, 상기 전구체는 TEMAH, TDEAH, TDMAH, Hf[N(C3H7)2]4 및 Hf[N(C4H9)2]4로 이루어진 그룹으로부터 선택되는 적어도 하나의 물질인 것을 특징으로 하는 산화물 박막의 형성방법.
- 제8항에 있어서, 상기 산화제는 H2O2, H2O, O3, N2O, NO2, 플라즈마 O2, 리모트 플라즈마 O2, 및 플라즈마 N2O로 이루어진 그룹으로부터 선택되는 적어도 하나의 산화제인 것을 특징으로 하는 산화물 박막의 형성방법.
- 제10항에 있어서, 상기 산화제는 O3 인 것을 특징으로 하는 산화물 박막의 형성방법.
- 제8항에 있어서, 상기 전구체는 200 내지 300℃의 온도 범위 및 0.4 torr 보다 낮은 압력에서 불활성 캐리어 가스에 의해 상기 챔버내에 도입되는 것을 특징으로 하는 산화물 박막의 형성방법.
- 제8항에 있어서, 상기 (b) 단계 내지 상기 (f) 단계를 적어도 한번 반복하는 것을 특징으로 하는 산화물 박막의 형성방법.
- 제8항에 있어서, 상기 전구체막을 구성하지 않는 전구체를 상기 챔버로부터 제거하는 단계; 및 반응하지 않은 산화제를 상기 챔버로부터 제거하는 단계는불활성 가스를 상기 챔버내에 도입하는 단계를 포함하는 것을 특징으로 하는 산화물 박막의 형성방법.
- (a) 반도체 기판 상에 제1 전극을 형성하는 단계;(b) 상기 제1 전극을 금속(M) 및 상기 금속과 결합하는 아미노기(X)를 포함하고 화학식 MXn으로 표현되는 전구체에 노출하여 상기 제1 전극 상에 화학적으로 흡착된 전구체막을 형성하는 단계;(c) 상기 전구체막을 산화제와 반응시켜 상기 제1 전극 상에 산화물 유전막을 형성하는 단계; 및(d) 상기 유전막 상에 제2 전극을 형성하는 단계를 포함하고,상기 금속(M)은 원소 주기율표에서 2족, 란탄 계열을 포함하는 3A족, 4A족, 5A족, 3B족, 4B족 및 5B족 원소로 이루어진 그룹으로부터 선택되는 어느 하나의 금속 원소이고,상기 아미노기(X)는 -NR1R2 으로서 상기 R1 및 상기 R2 는 수소 원자 또는 탄소 원자의 수가 1 개 내지 4 개인 알킬기 중에서 독립적으로 선택되고,상기 n은 2, 3, 4 또는 5의 정수인 것을 특징으로 하는 반도체 장치의 캐패시터 형성방법.
- 제15항에 있어서, 상기 전구체는 TEMAH, TDEAH, TDMAH, Hf[N(C3H7)2]4, Hf[N(C4H9)2]4, Ti[N(CH3)C2H5]4, Zr[N(CH3)C2H5]4, Sn[N(CH3)C2H5]4, Ta[N(CH3)C2H5]5, Al[N(CH3)C2H5]4 및 (CH3)2AlNH2로 이루어진 그룹으로부터 선택되는 적어도 하나의 원소인 것을 특징으로 하는 캐패시터의 형성방법.
- 제15항에 있어서, 상기 산화제는 H2O2, H2O, O3, N2O, NO2, 플라즈마 O2, 리모트 플라즈마 O2, 및 플라즈마 N2O로 이루어진 그룹으로부터 선택된 적어도 하나의 산화제인 것을 특징으로 하는 캐패시터의 형성방법.
- 제15항에 있어서, 상기 제1 전극은 최소한 10:1의 어스팩트비를 갖는 것을 특징으로 하는 캐패시터의 형성방법.
- 제15항에 있어서, 상기 제1 전극은 도핑된 폴리실리콘, 질화 금속, 금속으로 이루어진 그룹으로부터 선택된 적어도 하나의 도전물질의 막을 포함하는 것을 특징으로 하는 캐패시터의 형성방법.
- 제19항에 있어서, 상기 제1 전극은 도핑된 폴리실리콘막 및 상기 도핑된 폴 리실리콘막의 표면 상에 형성된 질화막을 포함하는 것을 특징으로 하는 캐패시터의 형성방법.
- 제15항에 있어서, 상기 제2 전극은 도핑된 폴리실리콘, 질화 금속, 금속으로 이루어진 그룹으로부터 선택된 적어도 하나의 도전물질의 막을 포함하는 것을 특징으로 하는 캐패시터의 형성방법.
- (a) 반도체 기판 상에 제1 전극을 형성하는 단계;(b) 상기 제1 전극을 제1 금속 및 상기 제1 금속과 결합하는 아미노기를 포함하는 제1 전구체에 노출하여 상기 제1 전극 상에 화학적으로 흡착된 제1 전구체막을 형성하는 단계;(c) 상기 제1 전구체막을 산화제와 반응시켜 상기 제1 전극 상에 제1 산화물 유전막을 형성하는 단계;(d) 상기 제1 산화물 유전막을 제2 금속 및 상기 제2 금속과 결합하는 아미노기를 포함하는 제2 전구체에 노출하여 상기 제1 전극 상에 화학적으로 흡착된 제2 전구체막을 형성하는 단계;(e) 상기 제2 전구체막을 산화제와 반응시켜 상기 제1 전극 상에 제2 산화물 유전막을 형성하여, 상기 제1 산화물 유전막 및 상기 제2 산화물 유전막으로 이루어진 복합 유전막을 형성하는 단계; 및(f) 상기 복합 유전막 상에 제2 전극을 형성하는 단계를 포함하는 반도체 장치의 캐패시터의 형성방법.
- 제22항에 있어서, 상기 제1 산화물 유전막 및 상기 제2 산화물 유전막은 HfO2, ZrO2, Ta2O5, Y2O3, Nb2O5, TiO2, CeO2, In2O3, RuO2, MgO, SrO, SnO2, PbO, PbO2, V2O3, La2O3, Pr2O3, 및 CaO로 이루어진 그룹으로부터 선택되고, 서로 다른 막인 것을 특징으로 하는 캐패시터의 형성방법.
- 제23항에 있어서, 상기 제1 산화물 유전막 및 상기 제2 산화물 유전막은 Al2O3 및 HfO2인 것을 특징으로 하는 캐패시터의 형성방법.
- 제1 전극을 형성하는 단계;청구항 1의 방법에 따라 산화막을 형성하는 단계; 및제2 전극을 형성하는 단계를 포함하는 반도체 장치 상에 캐패시터의 형성방법.
- 삭제
- 기판 표면을, 실리콘 및 상기 실리콘과 결합하는 아미노기(X)를 포함하고 화학식 Si[X]n으로 표현되는 전구체에 노출하여 상기 기판 표면 상에 화학적으로 흡착된 전구체막을 형성하는 단계; 및상기 화학적으로 흡착된 전구체막을 산화제로 산화하여 상기 기판 표면 상에 실리콘 산화막을 형성하는 단계를 포함하여 형성되고,상기 아미노기(X)는 -NR1R2 으로서 상기 R1 및 상기 R2 는 서로 다르고 수소 원자 또는 탄소 원자의 수가 1 개 내지 4 개인 알킬기 중에서 선택되고,상기 n은 2, 3, 4 또는 5의 정수인 것을 특징으로 하는 산화막의 형성방법.
- 제27항에 있어서, 상기 전구체는 Si[N(CH3)C2H5]4를 포함하는 것을 특징으로 하는 산화막의 형성방법.
- 제27항에 있어서, 상기 산화제는 H2O2, H2O, O3, N2O, NO2, 플라즈마 O2, 리모트 플라즈마 O2, 및 플라즈마 N2O로 이루어진 그룹으로부터 선택된 적어도 하나의 산화제인 것을 특징으로 하는 산화막의 형성방법.
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KR20040016779A (ko) | 2004-02-25 |
US20040033698A1 (en) | 2004-02-19 |
US7151039B2 (en) | 2006-12-19 |
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