KR101891373B1 - 핀 구조물을 갖는 반도체 디바이스 및 그 제조 방법 - Google Patents
핀 구조물을 갖는 반도체 디바이스 및 그 제조 방법 Download PDFInfo
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Abstract
Description
도 1은 특정 실시예에 따른 반도체 디바이스의 단면도이다.
도 2 내지 도 4는 도 1의 반도체 디바이스를 제조하기 위한 방법에서의 각종 단계의 도시도이다.
도 5a 내지 도 5d는 특정 실시예에 따른, 동일 기판 상에 FinFET 및 평면 MOSFET 디바이스를 형성하기 위한 각종 단계의 도시도이다.
Claims (18)
- 반도체 디바이스 제조 방법이며,
반도체 기판을 제공하는 단계;
상기 반도체 기판의 적어도 하나의 영역에서 반도체 기판의 표면에 고농도로 도핑된 구역을 형성하는 단계로서, 상기 고농도로 도핑된 구역은 적어도 하나의 고농도로 도핑된 층을 포함하고, 상기 적어도 하나의 고농도로 도핑된 층은 반도체 기판의 도핑 농도보다 큰 제1 도전형의 도핑 농도를 갖는 단계;
상기 고농도로 도핑된 구역을 포함하는 상기 반도체 기판 상에 반도체 재료의 추가 층을 형성하는 단계로서, 상기 추가 층은 도핑되지 않은 층을 포함하는 단계;
상기 적어도 하나의 영역에 적어도 하나의 비에칭 부분과 적어도 하나의 에칭 부분을 형성하기 위해 상기 반도체 기판에 제1 제거 공정을 적용하는 단계로서, 상기 적어도 하나의 비에칭 부분은 적어도 하나의 핀 구조물을 가지며, 상기 적어도 하나의 에칭 부분은 적어도 상기 추가 층의 두께를 통해서 연장되는 단계;
상기 적어도 하나의 핀 구조물 내의 추가 층이 노출 유지되도록 선택되는 두께로 유전체를 상기 적어도 하나의 에칭 부분에 형성하는 단계; 및
상기 적어도 하나의 핀 구조물의 노출된 표면 주위에 감기는 게이트를 형성하는 단계를 포함하고,
상기 고농도로 도핑된 구역을 형성하는 단계는 상기 고농도로 도핑된 구역에서 상기 추가 층으로 도펀트가 확산되는 것을 방지하기 위하여 상기 고농도로 도핑된 구역과 상기 추가 층 사이의 계면에 표면 층을 제공하도록 추가 임프란트를 제공하는 것을 포함하는 반도체 디바이스 제조 방법. - 제1항에 있어서, 상기 유전체를 상기 적어도 하나의 에칭 부분에 형성하는 단계는,
상기 제1 제거 공정의 적용 단계 이전에, 상기 적어도 하나의 핀 구조물에 대응하는 패턴으로 상기 추가 층 상에 정지 층을 제공하는 단계;
상기 제1 제거 공정의 적용 단계 이후에, 반도체 기판 상에 블랭킷 유전체 필름을 증착하는 단계;
상기 블랭킷 유전체 필름의 평탄면이 상기 정지 층과 일치하도록 상기 반도체 기판에 평탄화 공정을 적용하는 단계; 및
블랭킷 유전체 필름의 일부를 우선적으로 제거하는 제2 제거 공정을 반도체 기판에 적용하는 단계를 포함하는 반도체 디바이스 제조 방법. - 제1항에 있어서, 상기 고농도로 도핑된 구역의 형성 단계는 제1 도전형의 도펀트 원자를 5×1018 내지 1×1020 atom/㎤의 농도로 제공하기 위해 적어도 하나의 종을 주입하는 단계를 포함하는 반도체 디바이스 제조 방법.
- 삭제
- 제1항에 있어서, 상기 반도체 기판은 벌크 실리콘 기판, 에피 기판, 또는 실리콘-온-인슐레이터 기판 중 하나를 포함하는 반도체 디바이스 제조 방법.
- 제1항 내지 제3항 및 제5항 중 어느 한 항에 있어서, 상기 추가 층 형성 단계는 에피택셜 실리콘의 층을 증착하는 단계를 포함하는 반도체 디바이스 제조 방법.
- 반도체 디바이스 제조 방법이며,
실리콘 기판을 제공하는 단계;
상기 실리콘 기판의 적어도 하나의 영역에서 실리콘 기판의 표면에 고농도로 도핑된 구역을 형성하는 단계로서, 상기 고농도로 도핑된 구역은 적어도 하나의 고농도로 도핑된 층을 포함하고, 상기 적어도 하나의 고농도로 도핑된 층은 반도체 기판의 도핑 농도보다 큰 제1 도전형의 도핑 농도를 갖는 단계;
상기 고농도로 도핑된 구역을 포함하는 상기 실리콘 기판 상에 반도체 재료의 추가 층을 형성하는 단계로서, 상기 추가 층은 도핑되지 않은 규소-함유 에피택셜 층을 포함하는 단계;
상기 적어도 하나의 영역에 적어도 하나의 비에칭 부분과 적어도 하나의 에칭 부분을 형성하기 위해 상기 실리콘 기판에 제1 제거 공정을 적용하는 단계로서, 상기 적어도 하나의 비에칭 부분은 적어도 하나의 핀 구조물을 가지며, 상기 적어도 하나의 에칭 부분은 상기 고농도로 도핑된 구역의 적어도 일부를 통해서 연장되는 단계;
상기 적어도 하나의 에칭 부분에 적어도 하나의 유전체 층을 배치하는 단계로서, 상기 적어도 하나의 유전체 층의 두께는 적어도 하나의 유전체 층의 상면이 상기 고농도로 도핑된 구역과 맞닿도록 선택되는 배치 단계; 및
상기 적어도 하나의 핀 구조물에 게이트를 형성하여 적어도 하나의 FinFET 디바이스를 제공하는 단계를 포함하고,
상기 고농도로 도핑된 구역을 형성하는 단계는 상기 고농도로 도핑된 구역에서 상기 추가 층으로 도펀트가 확산되는 것을 방지하기 위하여 상기 고농도로 도핑된 구역과 상기 추가 층 사이의 계면에 표면 층을 제공하도록 추가 임프란트를 제공하는 것을 포함하는 반도체 디바이스 제조 방법. - 제7항에 있어서, 상기 배치 단계는,
상기 제1 제거 공정의 적용 단계 이전에, 상기 적어도 하나의 핀 구조물에 대응하는 패턴으로 상기 추가 층 상에 정지 층을 제공하는 단계;
상기 제1 제거 공정의 적용 단계 이후에, 실리콘 기판 상에 적어도 하나의 블랭킷 유전체 필름을 증착하는 단계;
상기 적어도 하나의 블랭킷 유전체 필름의 평탄면이 상기 정지 층과 일치하도록 상기 실리콘 기판에 평탄화 공정을 적용하는 단계; 및
적어도 하나의 유전체 층을 초래하기 위해 적어도 하나의 블랭킷 유전체 필름의 일부를 우선적으로 제거하는 제2 제거 공정을 실리콘 기판에 적용하는 단계를 포함하는 반도체 디바이스 제조 방법. - 제7항에 있어서, 상기 고농도로 도핑된 구역의 형성 단계는 제1 도전형의 도펀트 원자를 제공하기 위해 적어도 하나의 종을 주입하는 단계를 포함하는 반도체 디바이스 제조 방법.
- 제7항에 있어서, 상기 고농도로 도핑된 구역의 형성 단계는 추가 층 내로의 도펀트 확산을 방지하기 위해 실리콘 기판의 표면에 적어도 하나의 배리어 층을 형성하는 단계를 포함하는 반도체 디바이스 제조 방법.
- 제7항에 있어서, 상기 실리콘 기판은 벌크 실리콘 기판, 에피 기판, 또는 실리콘-온-인슐레이터 기판 중 하나를 포함하는 반도체 디바이스 제조 방법.
- 제7항에 있어서, 상기 도핑되지 않은 규소-함유 에피택셜 층은 도핑되지 않은 규소 에피택셜 층을 포함하는 반도체 디바이스 제조 방법.
- 반도체 디바이스 제조 방법이며,
반도체 기판을 제공하는 단계;
상기 반도체 기판의 적어도 하나의 영역에서 반도체 기판의 표면에 고농도로 도핑된 구역을 형성하는 단계로서, 상기 고농도로 도핑된 구역은 적어도 하나의 고농도로 도핑된 층을 포함하고, 상기 적어도 하나의 고농도로 도핑된 층은 반도체 기판의 도핑 농도보다 큰 제1 도전형의 도핑 농도를 갖는 단계;
상기 고농도로 도핑된 구역을 포함하는 상기 반도체 기판 상에 반도체 재료의 추가 층을 형성하는 단계로서, 상기 추가 층은 도핑되지 않은 층을 포함하는 단계;
상기 적어도 하나의 영역에 적어도 하나의 제1 비에칭 부분, 적어도 하나의 제2 비에칭 부분, 및 적어도 하나의 에칭 부분을 형성하기 위해 상기 반도체 기판에 제1 제거 공정을 적용하는 단계로서, 상기 적어도 하나의 제1 비에칭 부분은 적어도 하나의 핀 구조물을 갖고, 상기 적어도 하나의 제2 비에칭 부분은 적어도 하나의 평면 활성 영역을 가지며, 상기 적어도 하나의 에칭 부분은 적어도 상기 고농도로 도핑된 층의 일부를 통해서 연장되는 단계;
상기 적어도 하나의 에칭 부분에 적어도 하나의 유전체 층을 배치하여 상기 적어도 하나의 유전체 층의 상면이 적어도 하나의 핀 구조물 내의 고농도로 도핑된 구역과 맞닿고 적어도 하나의 평면 활성 영역에서 추가 층의 상면과 맞닿게 하는 배치 단계;
상기 적어도 하나의 핀 구조물 내에 게이트를 형성하여 적어도 하나의 FinFET 디바이스를 제공하는 단계; 및
상기 적어도 하나의 평면 활성 구역에 게이트를 형성하여 적어도 하나의 평면 MOSFET 디바이스를 제공하는 단계를 포함하고,
상기 고농도로 도핑된 구역을 형성하는 단계는 상기 고농도로 도핑된 구역에서 상기 추가 층으로 도펀트가 확산되는 것을 방지하기 위하여 상기 고농도로 도핑된 구역과 상기 추가 층 사이의 계면에 표면 층을 제공하도록 추가 임프란트를 제공하는 것을 포함하는 반도체 디바이스 제조 방법. - 제13항에 있어서, 상기 적어도 하나의 에칭 부분은 고농도로 도핑된 구역을 통해서 연장되는 반도체 디바이스 제조 방법.
- 제13항에 있어서, 상기 배치 단계는,
상기 제1 제거 공정의 적용 단계 이전에, 상기 적어도 하나의 핀 구조물 및 상기 적어도 하나의 평면 활성 영역에 대응하는 패턴으로 상기 추가 층 상에 정지 층을 제공하는 단계;
상기 제1 제거 공정의 적용 단계 이후에, 실리콘 기판 상에 적어도 하나의 블랭킷 유전체 필름을 증착하는 단계;
상기 적어도 하나의 블랭킷 유전체 필름의 평탄면이 상기 정지 층과 일치하도록 상기 반도체 기판에 평탄화 공정을 적용하는 단계;
상기 적어도 하나의 평면 활성 영역과 상기 평탄면의 인접한 부분 위에 마스킹 층을 형성하는 단계; 및
적어도 하나의 유전체 층을 초래하기 위해 적어도 하나의 블랭킷 유전체 필름의 일부를 우선적으로 제거하는 제2 제거 공정을 반도체 기판에 적용하는 단계를 포함하는 반도체 디바이스 제조 방법. - 제13항에 있어서, 상기 고농도로 도핑된 구역의 형성 단계는 제1 도전형의 도펀트 원자를 제공하기 위해 적어도 하나의 종을 주입하는 단계를 포함하는 반도체 디바이스 제조 방법.
- 제13항에 있어서, 상기 고농도로 도핑된 구역의 형성 단계는 적어도 하나의 평면 MOSFET 디바이스에 적어도 하나의 임계치 전압 조절층을 제공하기 위해 적어도 하나의 종을 주입하는 단계를 포함하는 반도체 디바이스 제조 방법.
- 제13항에 있어서, 상기 고농도로 도핑된 구역의 형성 단계는 추가 층 내로의 도펀트 확산을 방지하기 위해 실리콘 기판의 표면에 적어도 하나의 배리어 층을 형성하는 단계를 포함하는 반도체 디바이스 제조 방법.
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