KR20180021133A - 가공 실리콘 기판들 상의 gan 디바이스들 - Google Patents
가공 실리콘 기판들 상의 gan 디바이스들 Download PDFInfo
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Abstract
Description
도 1은 실시예들에 따라, GOS 기판들 및 그러한 기판들 상에 제조되는 집적 디바이스들의 후면측 처리를 예시하는 흐름도이다.
도 2는 일부 실시예들에 따라, 후면측 응력 조정 재료를 포함하는 GOS 기판들의 단면도들을 예시한다.
도 3은 실시예들에 따라, GOS 기판들 및 그러한 기판들 상에 제조되는 집적 디바이스들의 후면측 처리를 예시하는 흐름도이다.
도 4는 일부 실시예들에 따라, 후면측 응력 조정 구조체들을 포함하는 GOS 기판들의 단면도들을 예시한다.
도 5a 및 도 5b는 일부 실시예들에 따른 GOS 기판들 상의 후면측 응력 조정 구조체들의 평면도들이다.
도 5c는 일부 실시예들에 따른 후면측 응력 조정 구조체들을 포함하는 GOS 기판의 단면도이다.
도 5d는 일부 실시예들에 따른 GOS 기판들 상의 후면측 응력 조정 구조체들의 평면도이다.
도 6a는 일부 실시예들에 따른 후면측 응력 조정 구조체들을 포함하는 GOS 기판의 단면도이다.
도 6b는 일부 실시예들에 따른 GOS 기판들 상의 후면측 응력 조정 구조체들의 평면도이다.
도 6c는 일부 실시예들에 따라, 얇은 실리콘 기판 상에 배치되는 실리콘-계 CMOS 디바이스들 및 응력 가공 실리콘 기판 상에 배치되는 III-N-계 디바이스들을 포함하는 3D IC 구조체의 단면도이다.
도 7은 본 발명의 실시예들에 따라, 얇은 실리콘 기판 상의 실리콘 FET들 및 응력 가공 실리콘 기판 상의 GaN HFET들을 포함하는 3D IC를 이용하는 이동 컴퓨팅 플랫폼 및 데이터 서버 머신을 예시한다.
도 8은 본 발명의 일 실시예에 따른 전자 컴퓨팅 디바이스의 기능 블록도이다.
Claims (20)
- 실리콘 기판의 전면측 상에 배치되는 하나 이상의 단일 결정 III-N 반도체 재료 층들;
상기 기판 전면측에 위체 배치되고 상기 III-N 반도체 재료 층들 중 적어도 하나를 포함하는 마이크로전자 디바이스; 및
상기 하나 이상의 단일 결정 III-N 반도체 재료 층들에 의해 유도되는 실리콘 기판에서의 휨을 감소시키는 실리콘 기판의 후면측 상에 배치되는 응력 조정 재료
를 포함하는 III-N 반도체 디바이스 구조체. - 제1항에 있어서, 상기 응력 조정 재료는 4와 6 ppm/℃ 사이의 선형 열팽창 계수를 갖는 III-N 반도체 디바이스 구조체.
- 제2항에 있어서, 상기 응력 조정 재료는 III-N 재료, 질화 실리콘, 열 산화물, 산질화 실리콘, 티타늄, 텅스텐, TiW, 크롬, 또는 니켈-바나듐 중 적어도 하나를 포함하는 III-N 반도체 디바이스 구조체.
- 제1항에 있어서,
상기 실리콘 기판은 적어도 775 ㎛의 두께를 갖고;
상기 III-N 반도체 재료 층들은 적어도 1 ㎛의 두께를 갖는 단결정 GaN 층을 포함하고;
상기 응력 조정 재료는 적어도 0.25 ㎛의 두께를 갖는 III-N 반도체 디바이스 구조체. - 제1항에 있어서, 상기 응력 조정 재료는 상기 기판 후면측에서의 트렌치 내에 배치되는 III-N 반도체 디바이스 구조체.
- 제5항에 있어서, 상기 응력 조정 재료는 상기 기판 후면측에서의 제1 트렌치 내에 배치되는 제1 응력 조정 재료; 및 상기 기판 후면측에서의 제2 트렌치 내에 배치되는 제2 응력 조정 재료를 더 포함하는 III-N 반도체 디바이스 구조체.
- 제6항에 있어서,
상기 III-N 반도체 재료 층들은 상기 기판 전면측의 제1 영역 위에 배치되고 실리콘 채널드 MOSFET들은 상기 기판 전면측의 제2 영역 위에 배치되며;
상기 제1 트렌치는 상기 기판의 제1 영역과 반대쪽에 배치되고;
상기 제2 트렌치는 상기 기판의 제2 영역과 반대쪽에 배치되는 III-N 반도체 디바이스 구조체. - 제5항에 있어서,
상기 응력 조정 재료는 금속이고;
상기 트렌치는 상기 기판 후면측으로부터 상기 기판 내로 적어도 50 ㎛의 깊이를 연장하고;
금속 충전 비아는 상기 기판 전면측과의 사이에서 상기 기판을 통해 연장되고 상기 금속 응력 조정 재료를 교차하는 III-N 반도체 디바이스 구조체. - 3차원 집적 회로(3D IC)로서,
얇은 실리콘 기판 상에 배치되는 복수의 실리콘 MOSFET들을 포함하는 실리콘 CMOS 다이;
상기 실리콘 CMOS 다이로 적층되는 고전압 다이를 포함하며, 상기 고전압 다이는 하나 이상의 단일 결정 III-N 반도체 재료 층들을 갖는 GaN 온 실리콘(GOS) 기판 상에 배치되는 복수의 GaN 채널드 고전자 이동도 트랜지스터들(HEMTs)을 포함하고, 상기 GOS 기판은 상기 얇은 실리콘 기판보다 더 큰 두께의 두꺼운 실리콘 기판을 포함하고, 응력 조정 재료는 상기 하나 이상의 단일 결정 III-N 반도체 재료 층들에 의해 유도되는 GOS 기판에서의 휨을 감소시키는, 상기 HEMT들과 반대쪽의 GOS 기판의 후면측 상에 배치되는
3차원 집적 회로. - 제9항에 있어서,
상기 응력 조정 재료는 상기 GOS 기판의 후면측에 내장되는 트렌치에 배치되는 금속이고;
범프 금속은 상기 응력 조정 재료를 상기 실리콘 CMOS 다이 또는 히트 싱크에 연결하는 3차원 집적 회로. - 제10항에 있어서, 상기 고전압 다이는 상기 응력 조정 재료 상에 랜딩되는 관통 비아를 더 포함하는 3차원 집적 회로.
- 제9항에 있어서,
상기 얇은 실리콘 기판은 상기 응력 조정 층과 반대쪽의 측면 상의 고전압 다이에 결합되고;
관통 비아는 상기 얇은 기판을 통해 연장되고 상기 고전압 다이와 결합되는 3차원 집적 회로. - 제9항에 있어서,
상기 응력 조정 재료는 4와 6 ppm/℃ 사이의 선형 열팽창 계수를 갖고;
상기 두꺼운 실리콘 기판은 적어도 775 ㎛의 두께를 갖고;
상기 얇은 실리콘 기판은 100 ㎛ 미만의 두께를 갖는 3차원 집적 회로. - GaN 온 실리콘(GOS) 기판으로서,
적어도 300 mm의 직경을 갖는 실리콘 기판 상에 배치되는 적어도 1 ㎛의 두께를 갖는 GaN 층을 포함하는 하나 이상의 단일 결정 III-N 반도체 재료 층들; 및
상기 GaN 층과 반대쪽의 GOS 기판의 후면측 상에 배치되는 응력 조정 재료 - 상기 응력 조정 재료는 상기 하나 이상의 단일 결정 III-N 반도체 재료 층들에 의해 유도되는 GOS 기판에서의 휨을 감소시킴 -
를 포함하는 GaN 온 실리콘 기판. - 제14항에 있어서,
상기 실리콘 기판은 적어도 775 ㎛의 두께를 갖고;
상기 응력 조정 재료는 4와 6 ppm/℃ 사이의 선형 열팽창 계수를 갖는 GaN 온 실리콘 기판. - GaN 온 실리콘(GOS) 기판을 형성하는 방법으로서,
적어도 300 mm의 직경을 갖는 실리콘 기판을 수용하는 단계;
상기 실리콘 기판의 후면측 상에 응력 조정 재료를 퇴적하는 단계; 및
상기 실리콘 기판의 전면측 상에 적어도 1 ㎛의 두께를 갖는 GaN 층을 포함하는 하나 이상의 단일 결정 III-N 반도체 재료 층들을 에피택셜 성장시키는 단계
를 포함하는 방법. - 제16항에 있어서,
트렌치를 상기 실리콘 기판의 후면측 내에 에칭하는 단계; 및
상기 응력 조정 재료를 상기 트렌치 내에 퇴적하는 단계를 더 포함하는 방법. - 제16항에 있어서, 상기 응력 조정 재료를 퇴적하는 단계는 원자 층 퇴적, 또는 물리 기상 퇴적에 의해 질화 알루미늄, 질화 실리콘, 티타늄, 텅스텐, TiW, 크롬, 또는 니켈-바나듐 중 적어도 하나를 퇴적하는 단계를 더 포함하는 방법.
- 3D IC를 형성하는 방법으로서,
얇은 실리콘 기판 상에 배치되는 복수의 실리콘 MOSFET들을 포함하는 실리콘 CMOS 다이를 수용하는 단계;
하나 이상의 단일 결정 III-N 반도체 재료 층들을 갖는 GaN 온 실리콘(GOS) 기판 상에 배치되는 복수의 GaN 채널드 고전자 이동도 트랜지스터들(HEMTs)을 포함하는 고전압 다이를 수용하는 단계 - 상기 GOS 기판은 상기 얇은 실리콘 기판보다 더 큰 두께의 두꺼운 실리콘 기판을 포함하고, 응력 조정 금속은 상기 HEMT들과 반대쪽의 상기 GOS 기판의 후면측 상에 배치됨 -; 및
범프 금속이 상기 응력 조정 금속과 접촉하면서 상기 실리콘 CMOS 다이를 상기 고전압 다이에 연결하는 단계
를 포함하는 방법. - 제19항에 있어서, 상기 두꺼운 실리콘 기판은 적어도 775 ㎛의 두께를 갖고, 상기 얇은 실리콘 기판은 100 ㎛ 미만의 두께를 갖는 방법.
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