KR102380098B1 - 매립형 전력 레일들 - Google Patents
매립형 전력 레일들 Download PDFInfo
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Abstract
Description
도 1 내지 도 20은 개시의 몇몇 실시예들에 따른 반도체 제조 프로세스 동안 중간 스테이지들의 다양한 개략도들을 도시한다;
도 21 내지 도 30은 개시의 몇몇 실시예들에 따른 매립형 전력 레일을 형성하기 위한 중간 스테이지들의 다양한 개략도들을 도시한다; 그리고
도 31 내지 도 39는 개시의 몇몇 실시예들에 따른 매립형 전력 레일들을 형성하기 위한 중간 스테이지들의 다양한 개략도들을 도시한다.
Claims (22)
- 반도체 디바이스에 있어서,
제 1 격리 트렌치 내의 제 1 레일 개구에 형성된 제 1 전력 레일;
상기 제 1 레일 개구 내의 상기 제 1 전력 레일 상의 제 1 유전체 캡 - 상기 제 1 유전체 캡은 상기 제 1 유전체 캡 상의 도전성 패턴 구조로부터 상기 제 1 전력 레일을 격리함 -;
상기 제 1 전력 레일과 동일한 두께를 갖고 제 2 격리 트렌치 내의 제 2 레일 개구에 형성되는 제 2 전력 레일;
상기 제 2 레일 개구 내의 상기 제 2 전력 레일 상의 제 2 유전체 캡 - 상기 제 2 유전체 캡은 상기 제 2 레일 개구의 측면 재료에 에칭-선택적임 -; 및
상기 제 2 레일 개구의 측면 재료에 에칭-선택적인 상기 제 2 유전체 캡을 에칭하여 형성된 개구 - 상기 개구가 상기 제 2 전력 레일과 정렬되는 측면을 가지며, 상기 개구는 상기 도전성 패턴 구조를 상기 제 2 전력 레일과 연결하는 도전성 재료로 충진됨 -
를 포함하는 반도체 디바이스. - 제1항에 있어서, 상기 제 1 전력 레일은 상기 제 1 격리 트렌치 내에 형성되고, 상기 제 2 전력 레일은 상기 제 2 격리 트렌치 내에 형성되는 것인, 반도체 디바이스.
- 제1항에 있어서, 상기 제 1 전력 레일은 상기 제 1 격리 트렌치를 통해 벌크 실리콘 기판 내로 형성되고, 상기 제 2 전력 레일은 상기 제 2 격리 트렌치를 통해 상기 벌크 실리콘 기판 내로 형성되는 것인, 반도체 디바이스.
- 삭제
- 제1항에 있어서,
상기 제 2 유전체 캡은 상기 제 2 전력 레일과 상기 제 2 격리 트렌치 사이의 SiO 라이너 및 상기 제 2 격리 트렌치에서의 산화물에 에칭 선택적인 재료인 것인, 반도체 디바이스. - 제1항에 있어서,
상기 제 1 유전체 캡은 상기 제 1 전력 레일 상에서 선택적-증착되는 것인, 반도체 디바이스. - 제1항에 있어서,
상기 제 1 전력 레일 및 제 2 전력 레일은 700℃를 넘는 열적 안정성을 가진 금속 재료로 형성되는 것인, 반도체 디바이스. - 제7항에 있어서,
상기 금속 재료는 굴절성 금속인 것인, 반도체 디바이스. - 제7항에 있어서,
상기 금속 재료는 루테늄을 포함하는 것인, 반도체 디바이스. - 제1항에 있어서,
상기 제1 전력 레일 및 제 2 전력 레일의 종횡비는, 상기 제 1 전력 레일 및 제 2 전력 레일의 저항률 요건을 충족시키기 위해 미리 결정되는 것인, 반도체 디바이스. - 제10항에 있어서,
상기 제 1 전력 레일 및 제 2 전력 레일의 임계 치수 폭은 상기 종횡비와 함께 미리 결정되는 것인, 반도체 디바이스. - 제8항에 있어서,
상기 제 1 전력 레일 및 제 2 전력 레일은, 상기 굴절성 금속으로 상기 제 1 레일 개구 및 제 2 레일 개구를 충진하고 특정 깊이로 상기 굴절성 금속을 에칭 백(etching back)함으로써 형성되는 것인, 반도체 디바이스. - 반도체 디바이스를 제조하기 위한 방법에 있어서,
제 1 격리 트렌치 내의 제 1 레일 개구에, 제 1 전력 레일을, 그리고 제 2 격리 트렌치 내의 제 2 레일 개구에, 상기 제 1 전력 레일과 동일한 두께를 가진 제 2 전력 레일을 형성하는 단계;
제 1 유전체 캡으로 상기 제 1 전력 레일을, 그리고 제 2 유전체 캡으로 상기 제 2 전력 레일을 최상부-커버하는 단계 - 상기 제 2 유전체 캡은 상기 제 2 레일 개구의 측면 재료에 에칭-선택적임 -;
상기 제 2 레일 개구의 측면 재료에 에칭-선택적인 상기 제 2 유전체 캡 내의 개구를 에칭하여, 상기 개구의 측면을 상기 제 2 전력 레일과 정렬시키는 단계;
충진된 개구를 통해 상기 제 2 전력 레일과 도전성 패턴 구조를 연결하기 위해 도전성 재료로 상기 개구를 충진하는 단계 - 상기 제 1 유전체 캡은 상기 도전성 패턴 구조로부터 상기 제 1 전력 레일을 격리시킴 -
를 포함하는, 반도체 디바이스를 제조하기 위한 방법. - 제13항에 있어서, 상기 제 1 격리 트렌치 내의 상기 제 1 레일 개구에, 상기 제 1 전력 레일을, 그리고 상기 제 2 격리 트렌치 내의 상기 제 2 레일 개구에, 상기 제 2 전력 레일을 형성하는 단계는,
상기 제 1 격리 트렌치 내의 상기 제 1 레일 개구 및 상기 제 2 격리 트렌치 내의 상기 제 2 레일 개구를 에칭하는 단계; 및
상기 제 1 격리 트렌치 내의 상기 제 1 레일 개구에 제 1 전력 레일을, 그리고 상기 제 2 격리 트렌치 내의 상기 제 2 레일 개구에 제 2 전력 레일을 형성하는 단계를 더 포함하는, 반도체 디바이스를 제조하기 위한 방법. - 제13항에 있어서, 상기 제 1 격리 트렌치 내의 제 1 레일 개구에, 상기 제 1 전력 레일을, 그리고 상기 제 2 격리 트렌치 내의 제 2 레일 개구에, 상기 제 2 전력 레일을 형성하는 단계는,
상기 제 1 격리 트렌치를 통해 벌크 실리콘 기판 내로 상기 제 1 레일 개구를 에칭하고, 상기 제 2 격리 트렌치를 통해 상기 벌크 실리콘 기판 내로 상기 제 2 레일 개구를 에칭하는 단계; 및
상기 제 1 격리 트렌치 및 상기 벌크 실리콘 기판에 있는 상기 제 1 레일 개구에 상기 제 1 전력 레일을 형성하고, 상기 제 2 격리 트렌치 및 상기 벌크 실리콘 기판에 있는 상기 제 2 레일 개구에 상기 제 2 전력 레일을 형성하는 단계를 더 포함하는, 반도체 디바이스를 제조하기 위한 방법. - 삭제
- 제13항에 있어서,
상기 제 1 격리 트렌치 내의 상기 제 1 유전체 캡으로 상기 제 1 전력 레일을 최상부-커버하는 단계는,
상기 제 1 유전체 캡으로서 상기 제 1 전력 레일과 상기 제 1 격리 트렌치 사이의 SiO 라이너에 에칭 선택적인 유전체 재료를 선택적-증착시키는 단계를 더 포함하는, 반도체 디바이스를 제조하기 위한 방법. - 제13항에 있어서,
상기 격리 트렌치 내의 상기 제 1 레일 개구에, 상기 제 1 전력 레일을, 그리고 상기 제 2 격리 트렌치 내의 상기 제 2 레일 개구에, 상기 제 2 전력 레일을 형성하는 단계는,
700℃를 넘는 열적 안정성을 가진 금속 재료를 사용하여 상기 제 1 전력 레일 및 제 2 전력 레일을 형성하는 단계를 더 포함하는, 반도체 디바이스를 제조하기 위한 방법. - 제18항에 있어서,
상기 700℃를 넘는 열적 안정성을 가진 금속 재료를 사용하여 상기 제 1 전력 레일 및 제 2 전력 레일을 형성하는 단계는,
루테늄을 사용하여 상기 제1 전력 레일 및 제 2 전력 레일을 형성하는 단계를 더 포함하는, 반도체 디바이스를 제조하기 위한 방법. - 제19항에 있어서,
상기 루테늄을 사용하여 상기 제 1 전력 레일 및 제 2 전력 레일을 형성하는 단계는,
상기 루테늄으로 상기 제 1 격리 트렌치 내의 제 1 레일 개구를, 그리고 상기 제 2 격리 트렌치 내의 제 2 레일 개구를 충진하는 단계; 및
특정 깊이로 상기 루테늄을 에칭 백하는 단계를 더 포함하는, 반도체 디바이스를 제조하기 위한 방법. - 제13항에 있어서,
상기 제 1 격리 트렌치 내의 상기 제 1 레일 개구에, 상기 제 1 전력 레일을, 그리고 상기 제 2 격리 트렌치 내의 제 2 레일 개구에, 상기 제 2 전력 레일을 형성하는 단계는,
2 개의 레일 라인들을 포함하는 전력 레일을 형성하는 단계를 더 포함하는, 반도체 디바이스를 제조하기 위한 방법. - 제21항에 있어서,
상기 2 개의 레일 라인들을 포함하는 상기 전력 레일을 형성하는 단계는,
격리 트렌치에서 레일 개구의 측벽들 및 최하부 상에 스페이서 층을 등각 증착시키는 단계;
유전체 재료로 상기 레일 개구를 충진하는 단계;
2 개의 스페이서-트렌치들을 형성하기 위해 상기 레일 개구의 측벽들 상에 형성된 상기 스페이서 층을 제거하는 단계;
루테늄으로 상기 2 개의 스페이서-트렌치들을 충진하는 단계; 및
특정 깊이로 상기 루테늄을 에칭 백하는 단계를 더 포함하는, 반도체 디바이스를 제조하기 위한 방법.
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| TW201917893A (zh) | 2019-05-01 |
| US10586765B2 (en) | 2020-03-10 |
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| JP6865864B2 (ja) | 2021-04-28 |
| TWI734919B (zh) | 2021-08-01 |
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