KR102740456B1 - 식각용 조성물 및 이를 이용한 반도체 장치 제조 방법 - Google Patents
식각용 조성물 및 이를 이용한 반도체 장치 제조 방법 Download PDFInfo
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- KR102740456B1 KR102740456B1 KR1020160160023A KR20160160023A KR102740456B1 KR 102740456 B1 KR102740456 B1 KR 102740456B1 KR 1020160160023 A KR1020160160023 A KR 1020160160023A KR 20160160023 A KR20160160023 A KR 20160160023A KR 102740456 B1 KR102740456 B1 KR 102740456B1
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- acid
- film
- etching composition
- etching
- cooh
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K13/00—Etching, surface-brightening or pickling compositions
- C09K13/04—Etching, surface-brightening or pickling compositions containing an inorganic acid
- C09K13/06—Etching, surface-brightening or pickling compositions containing an inorganic acid with organic material
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K13/00—Etching, surface-brightening or pickling compositions
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Abstract
Description
도 15 내지 도 25는 본 발명의 몇몇 실시예들에 따른 식각용 조성물을 이용한 반도체 장치 제조 방법을 설명하기 위한 중간단계 도면들이다.
110, 210: 핀형 패턴 115, 215: 와이어 패턴
120, 220: 게이트 전극 121, 221: TaN막
122, 222: TiN막
Claims (20)
- 티타늄 질화물(TiN)을 식각하는 식각용 조성물에서,
상기 식각용 조성물은 상기 식각용 조성물의 총 중량에 대하여 5 내지 30 중량%의 과산화수소와, 20 초과 내지 40 미만 중량%의 산 화합물과, 0.001 내지 5 중량%의 부식 방지제를 포함하고,
상기 산 화합물은 인산(H3PO4), 질산(HNO3), 염산(HCl), 요오드산(HI), 브롬산(HBr), 과염소산(HClO4), 규산(H2SiO3), 붕산(H3BO3), 초산(CH3COOH), 프로피온산(C2H5COOH), 락트산(CH3CH(OH)COOH) 및 글리콜산(HOCH2COOH)으로 이루어진 군에서 선택되는 적어도 1종 이상을 포함하고,
상기 식각용 조성물의 pH는 2보다 작고,
탄탈륨 질화물에 대한 상기 티타늄 질화물의 식각 선택비는 500 이상인 식각용 조성물. - 제1 항에 있어서,
상기 산 화합물은 인산을 포함하는 식각용 조성물. - 제1 항에 있어서,
상기 부식 방지제는 과황산암모늄, 황산암모늄, 제1인산암모늄, 제2인산암모늄, 제3인산암모늄, 염화암모늄, 초산암모늄, 탄산암모늄, 질산암모늄, 암모늄아이오다이드, 1,2,4-트리아졸(1,2,4-Triazole), 3-아미노트리아졸(3-Aminotriazole), 5-아미노테트라졸(5-Aminotetrazole), 벤조트리아졸(Benzotriazole), 피라졸(Pyrazole), 이미다졸(Imidazole), 아스코빅산(Ascorbic acid), 시트르산(Citric acid), 숙신산(Succinic acid), 말레산(Maleic acid), 말론산(Malonic acid), 싸이오글리콜산(Thioglycolic acid), 타닌산(Tannic acid), 메틸갈레이트(Methyl gallate), 에틸갈레이트(Ethyl gallate), 및 프로필갈레이트(Propyl gallate)로 이루어진 군에서 선택되는 적어도 1종 이상을 포함하는 식각용 조성물. - 제1 항에 있어서,
상기 식각용 조성물의 총 중량에 대하여 0.001 내지 5 중량%의 킬레이트제를 더 포함하고,
상기 킬레이트제는 에틸렌디아민테트라아세트산(Ethylenediaminetetraacetic acid), 이미노디아세트산(Iminodiacetic acid), 디에틸렌트리아민펜타아세트산(Diethylenetriaminepentaacetic acid), 글리신(Glycine), 알라닌(Alanine), 발린(valine), 류신(Leucine), 이소류신(Isoleucine), 세린(serine), 트레오닌(Threonine), 티로신(Tyrosine), 페닐알라닌(Phenylalanine), 트립토판(Tryptophane), 아스파르트산(Aspartic acid), 클루타민산(Glutamic acid), 글루타민(glutamine), 아스파라긴(Asparagine), 리신(Lysine), 아르기닌(Arginine), 히스티딘(Histidine), 히드록시리신(Hydroxylysine), 시스테인(Cysteine), 메티오닌(Methionine), 시스틴(Cystine), 프롤린(Proline), 설파민산(Sulfamic acid), 및 히드록시프롤린(Hydroxyproline)로 이루어진 군에서 선택되는 적어도 1종 이상을 포함하는 식각용 조성물. - 제1 항에 있어서,
상기 식각용 조성용의 총 중량에 대하여 0.001 내지 0.1 중량%의 계면 활성제를 더 포함하고,
상기 계면 활성제는 알킬 설포네이트, 암모늄 알킬 설포네이트, 알킬 에테르 설포네이트, 알킬 아릴 에테르 설포네이트, 알킬 포스페이트, 암모늄 알킬 포스페이트, 알킬 에테르 포스페이트, 알킬 아릴 에테르 포스페이트, 플루오르알킬 술폰이미드, 암모늄 플루오르알킬 술폰이미드, CnH2n+1CH2CH2SO3-NH4+, CnH2n+1CH2CH2SO3H, (CnH2n+1CH2CH2O)xPO(ONH4+)y(OCH2CH2OH)z, (CnH2n+1CH2CH2O)xPO(ONH4+)y(OCH2CH2OH)z, CnH2n+1CH2CH2O(OCH2CH2OH)xH, CnH2n+1SO2N(C2H5)(CH2CH2)xH, CnH2n+1CH2CH2OCH2(OH)CH2CH2N(CnH2n+1)2, 및 CnH2n+1CH2CH2OCH2(OCH2CH2)nCH2CH2N(CnH2n+1)2, CnF2n+1CH2CH2SO3-NH4+, CnF2n+1CH2CH2SO3H, (CnF2n+1CH2CH2O)xPO(ONH4+)y(OCH2CH2OH)z, CnF2n+1CH2CH2O(OCH2CH2OH)xH, CnF2n+1SO2N(C2H5)(CH2CH2)xH, CnF2n+1CH2CH2OCH2(OH)CH2CH2N(CnF2n+1)2, 및 CnF2n+1CH2CH2OCH2(OCH2CH2)nCH2CH2N(CnF2n+1)2로 이루어진 군에서 선택되는 적어도 1종 이상을 포함하는 식각용 조성물.
상기 화학식에서 n은 1 내지 20 사이의 정수이고, x, y 및 z는 x+y+z=3을 만족하는 실수이다. - 삭제
- 삭제
- 삭제
- 제1 항에 있어서,
상기 식각용 조성물은 잔부의 용매를 포함하고,
상기 용매는 탈이온수(DIW)인 식각용 조성물. - 티타늄 질화물(TiN)을 식각하는 식각용 조성물에서,
상기 식각용 조성물은 과산화수소와, 산 화합물과, 부식 방지제를 포함하고,
상기 과산화수소의 중량에 대한 상기 산 화합물의 중량의 비율은 1 내지 7 사이이고,
상기 산 화합물은 인산(H3PO4), 질산(HNO3), 염산(HCl), 요오드산(HI), 브롬산(HBr), 과염소산(HClO4), 규산(H2SiO3), 붕산(H3BO3), 초산(CH3COOH), 프로피온산(C2H5COOH), 락트산(CH3CH(OH)COOH) 및 글리콜산(HOCH2COOH)으로 이루어진 군에서 선택되는 적어도 1종 이상을 포함하고,
상기 식각용 조성물의 pH는 2보다 작고,
탄탈륨 질화물에 대한 상기 티타늄 질화물의 식각 선택비는 500 이상인 식각용 조성물. - 제10 항에 있어서,
상기 산 화합물은 인산인 식각용 조성물. - 제10 항에 있어서,
상기 식각용 조성물은 상기 식각용 조성물의 총 중량에 대하여 5 내지 30 중량%의 과산화수소와, 15 내지 50 중량%의 산 화합물을 포함하는 식각용 조성물. - 삭제
- 제1 트렌치와 제2 트렌치를 포함하는 층간 절연막을 형성하고,
상기 제1 트렌치의 측벽과 바닥면을 따라 제1 TaN막을 형성하고, 상기 제2 트렌치의 측벽과 바닥면을 따라 제2 TaN막을 형성하고,
상기 제1 TaN막 상의 제1 TiN막과, 제2 TaN막 상의 제2 TiN막을 형성하고,
상기 제2 TiN막 상에, 마스크 패턴을 형성하고,
상기 마스크 패턴을 이용하여, 습식 식각으로 상기 제1 TiN막을 제거하여 제1 TaN막을 노출시키는 것을 포함하고,
상기 습식 식각은 식각용 조성물을 이용하고,
상기 식각용 조성물은 상기 식각용 조성물의 총 중량에 대하여 5 내지 30 중량%의 과산화수소와, 20 초과 내지 40 미만 중량%의 산 화합물과, 0.001 내지 5 중량%의 부식 방지제를 포함하고,
상기 산 화합물은 인산(H3PO4), 질산(HNO3), 염산(HCl), 요오드산(HI), 브롬산(HBr), 과염소산(HClO4), 규산(H2SiO3), 붕산(H3BO3), 초산(CH3COOH), 프로피온산(C2H5COOH), 락트산(CH3CH(OH)COOH) 및 글리콜산(HOCH2COOH)으로 이루어진 군에서 선택되는 1종 이상을 포함하고,
상기 식각용 조성물의 pH는 2보다 작고,
상기 식각용 조성물에서, 상기 제1 TaN막에 대한 상기 제1 TiN막의 식각 선택비는 500 이상인 반도체 장치 제조 방법. - 제14 항에 있어서,
상기 마스크 패턴을 제거한 후, 상기 제1 TaN막 상에 제1 트렌치를 채우는 제1 상부 전극막과, 상기 제2 TiN막 상에 제2 트렌치를 채우는 제2 상부 전극막을 형성하는 것을 더 포함하는 반도체 장치 제조 방법. - 제14 항에 있어서,
필드 절연막의 상면보다 돌출된 상면을 각각 포함하는 제1 핀형 패턴 및 제2 핀형 패턴을 형성하는 것으로 더 포함하고,
상기 제1 트렌치는 상기 제1 핀형 패턴과 교차하고, 상기 제2 트렌치는 상기 제2 핀형 패턴과 교차하는 반도체 장치 제조 방법. - 제16 항에 있어서,
상기 제1 TaN막은 상기 필드 절연막의 상면보다 위로 돌출된 상기 제1 핀형 패턴의 프로파일을 따라 형성되고,
상기 제2 TaN막은 상기 필드 절연막의 상면보다 위로 돌출된 상기 제2 핀형 패턴의 프로파일을 따라 형성되는 반도체 장치 제조 방법. - 제14 항에 있어서,
기판 상에, 상기 기판과 이격되는 제1 와이어 패턴 및 제2 와이어 패턴을 형성하는 것을 더 포함하고,
상기 제1 트렌치는 상기 제1 와이어 패턴과 교차하고, 상기 제2 트렌치는 상기 제2 와이어 패턴과 교차하는 반도체 장치 제조 방법. - 제18 항에 있어서,
상기 제1 TaN막은 상기 제1 와이어 패턴의 둘레를 따라 형성되고,
상기 제2 TaN막은 상기 제2 와이어 패턴의 둘레를 따라 형성되는 반도체 장치 제조 방법. - 제14 항에 있어서,
상기 제1 TiN막은 상기 제1 트렌치의 측벽 및 바닥면을 따라 형성되고, 상기 제2 TiN막은 상기 제2 트렌치의 측벽 및 바닥면을 따라 형성되는 반도체 장치 제조 방법.
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