KR20150023507A - 금속/금속 결합을 가지는 복합 구조체의 생산방법 - Google Patents
금속/금속 결합을 가지는 복합 구조체의 생산방법 Download PDFInfo
- Publication number
- KR20150023507A KR20150023507A KR20147036622A KR20147036622A KR20150023507A KR 20150023507 A KR20150023507 A KR 20150023507A KR 20147036622 A KR20147036622 A KR 20147036622A KR 20147036622 A KR20147036622 A KR 20147036622A KR 20150023507 A KR20150023507 A KR 20150023507A
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- wafer
- bonding
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- silicon
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Abstract
Description
도 1A 및 1B는 본 발명의 일 실시예에 따라 직결합 방법의 개략도,
도 2는 본 발명의 다른 실시예에 따라 직결합의 방법의 개략도, 그리고,
도 3은 본 발명에 따라, 상기 결합 인터페이스에서 스트레스 수준을 계산하기 위한 변수의 측정을 도시한 도면이다.
Claims (8)
- 적어도 하나의 제1 웨이퍼와 제2 웨이퍼의 직결합 단계를 포함하는 복합 구조체의 제조방법에 있어서,
상기 제1 웨이퍼 및 상기 제2 웨이퍼 사이의 결합 인터페이스가 결합 웨이브의 전파 이후에 0.7J/m2 이하의 결합 에너지를 가지는 결합 웨이브의 전파 개시 단계; 및
상기 제1 웨이퍼 및 상기 제2 웨이퍼의 결합 동안 유도된 스트레스 수준의 측정 단계로서, 상기 스트레스 수준은 Ct = Rc/Ep 공식을 이용하여 계산되는 스트레스 변수 Ct에 기초하여 결정되고, 여기에서, Rc는 상기 제1 웨이퍼 및 상기 제2 웨이퍼 어셈블리의 곡률 반경(km)에 대응하고, Ep는 상기 제1 웨이퍼 및 상기 제2 웨이퍼 어셈블리의 두께(㎛)에 대응하고, 상기 결정된 스트레스 수준 Ct가 0.07 이상일 때 상기 결합을 유효화하는 단계;를 포함하고,
상기 결합 웨이브의 전파 개시 단계는, 20 mbar 미만의 압력의 환경 및 0.1 MPa 내지 33.3 MPa 사이의 기계적 압력을 상기 두 웨이퍼 중 어느 하나에 적용하는 조건 중 적어도 하나의 조건 하에서 수행되는 것을 특징으로 하는 방법. - 제1항에 있어서,
상기 결합 웨이브의 전파 개시 단계 동안, 상기 두 웨이퍼 중 적어도 어느 하나는 2㎛ 이하의 평탄도 편차를 가지는 지지 상에 평탄화되어 홀딩되는 것을 특징으로 하는 방법. - 제1항 또는 제2항에 있어서,
각 웨이퍼는 텅스텐(tungsten), 알루미늄(aluminium), 탄탈럼(tantalum), 철(iron), 몰리브덴(molybdenum), 크로뮴(chromium), 루테늄(ruthenium), 니켈(nickel), 백금(platinum), 실리콘 질화물(silicon nitride) 및 실리콘(silicon) 중 적어도 하나의 선택된 물질을 그 결합면에 포함하는 것을 특징으로 하는 방법. - 제1항 내지 제3항 중 어느 한 항에 있어서,
상기 두 웨이퍼의 적어도 어느 하나는 텅스텐, 알루미늄, 탄탈럼, 철, 몰리브덴, 크로뮴, 루테늄, 니켈, 백금, 실리콘 질화물 및 실리콘 중 적어도 하나의 선택된 물질 층으로 커버된 실리콘 기질로 구성되어 상기 웨이퍼의 결합면을 형성하는 것을 특징으로 하는 방법. - 제1항 내지 제4항 중 어느 한 항에 있어서,
스트레스 수준이 유효한 경우에 있어서, 500℃ 이하의 온도에서 수행되는 어셈블리의 열 처리 단계 및 상기 두 웨이퍼 중 어느 하나의 화학적 또는 화학적-기계적 시닝(thinning) 단계 중 적어도 하나의 단계를 더 포함하는 것을 특징으로 하는 방법. - 제2 웨이퍼에 결합된 적어도 하나의 제1웨이퍼를 포함하고, 각 웨이퍼는 그 결합면 상에 금속 물질을 포함하고, 상기 제1 웨이퍼 및 상기 제2 웨이퍼 사이의 결합 인터페이스는 0.7 J/m2 이하의 결합 에너지를 가지는 복합 구조체로서,
상기 구조체는 상기 제1 웨이퍼 및 상기 제2 웨이퍼의 결합 이후에 0.07 이상의 스트레스 변수 Ct를 가지고, 상기 스트레스 변수 Ct는 Ct = Rc/Ep 공식을 이용하여 계산되는 것을 특징으로 하고, 여기에서, Rc는 상기 상기 제1 웨이퍼 및 상기 제2 웨이퍼 어셈블리의 곡률 반경(km)에 대응하고, Ep는 상기 제1 웨이퍼 및 상기 제2 웨이퍼 어셈블리의 두께(㎛)에 대응하는 복합 구조체. - 제6항에 있어서,
각 웨이퍼는 텅스텐, 알루미늄, 탄탈럼, 철, 몰리브덴, 크로뮴, 루테늄, 니켈, 백금, 실리콘 질화물 및 실리콘 중 적어도 하나의 선택된 금속 물질을 그 결합면 상에 포함하는 것을 특징으로 하는 복합 구조체. - 제7항에 있어서,
상기 두 웨이퍼 중 적어도 어느 하나는 텅스텐, 알루미늄, 탄탈럼, 철, 몰리브덴, 크로뮴, 루테늄, 니켈, 백금, 실리콘 질화물 및 실리콘 중 적어도 하나의 선택된 물질층으로 커버된 실리콘 기질로 구성되어 상기 웨이퍼의 결합면을 형성하는 것을 특징으로 하는 복합 구조체.
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