KR101543508B1 - FinFET용 메탈 게이트 및 게이트 접촉 구조체 - Google Patents
FinFET용 메탈 게이트 및 게이트 접촉 구조체 Download PDFInfo
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Abstract
Description
도 1 내지 도 10은 다양한 실시형태에 의한 IC 구조체를 제조하는 중간 스테이지의 단면도이다.
Claims (10)
- 집적회로(IC : integrated circuit) 구조체에 있어서,
기판;
상기 기판 상에 있고 상기 기판에 접속되는 반도체 스트립 - 반도체 스트립의 상부는 핀(fin)을 형성함 -;
상기 기판 상의 제1 ILD(first inter-layer dielectric) - 상기 핀은 상기 제1 ILD 내로 연장됨 -;
상기 제1 ILD 상의 제2 ILD - 상기 핀은 상기 제2 ILD 내로 연장되지 않음 -;
상기 제2 ILD의 상면으로부터 상기 제1 ILD 내로 연장되며, 상기 핀의 상면과 측벽 상에 있는 라이너(liner);
상기 핀 상의, 상기 제1 ILD 내에 있는 시그널 메탈(signal metal) - 상기 라이너의 일부분은 상기 시그널 메탈과 상기 핀 사이에 있음 -; 및
상기 시그널 메탈 위에 있고 상기 시그널 메탈에 접속되는, 상기 제2 ILD 내에 있는 게이트 콘택트 - 상기 게이트 콘택트의 측벽은 상기 라이너에 의해 커버되고, 상기 게이트 콘택트 및 상기 시그널 메탈은 연속된 금속 영역(uninterrupted metallic region)을 형성함 -;
를 포함하는, 집적회로 구조체. - 제1항에 있어서,
상기 집적회로 구조체는 개별 워크 펑션 메탈 또는 개별 게이트 콘택트 장벽은 포함하지 않는 것인, 집적회로 구조체. - 제1항에 있어서,
상기 라이너 아래에 있고 상기 핀의 상기 상면과 측벽 상에 있는 게이트 유전체를 더 포함하는, 집적회로 구조체. - 제3항에 있어서,
상기 게이트 유전체와 상기 핀 사이에 계면층(interfacial layer)을 더 포함하는, 집적회로 구조체. - 제1항에 있어서,
상기 제1 ILD와 상기 기판 사이의 상기 반도체 스트립의 대향 측면 상에 배치되는 제1 및 제2 유전체 영역을 더 포함하고, 상기 핀을 형성하는 상기 반도체 스트립의 상부는 상기 제1 및 제2 유전체 영역 위에서 연장되는, 집적회로 구조체. - 제1항에 있어서,
상기 라이너는 티타늄 질산염(titanium nitrate), 탄탈룸 질산염(tantalum nitrate), 티타늄 알루미늄(titanium aluminum), 또는 이것들의 조합으로 형성되는, 집적회로 구조체. - 제1항에 있어서,
상기 연속된 금속 영역은 텅스텐, 알루미늄, 구리, 또는 이것들의 조합으로 형성되는, 집적회로 구조체. - 기판 - 상기 기판의 부분은 상방으로 연장되어 핀(fin)을 형성함 -;
상기 핀의 상면과 측벽 상의 게이트 유전체;
상기 기판 상의 제1 ILD(first inter-layer dielectric) - 상기 핀은 상기 제1 ILD 내로 연장됨 -;
상기 제1 ILD 상의 제2 ILD - 상기 핀은 상기 제2 ILD 내로 연장되지 않음 -;
상기 게이트 유전체 상에 놓이고, 상기 제2 ILD의 상면으로부터 상기 제1 ILD 내로 연장되며, 상기 핀의 상면과 측벽 상에 있는 라이너(liner); 및
상기 게이트 유전체 상에 놓인 상기 라이너의 부분 상의 연속된 금속 피쳐(uninterrupted metallic feature)
를 포함하고,
상기 라이너는 상기 연속된 금속 피쳐의 상면으로부터 연장되고, 상기 금속 피쳐의 측벽을 커버하고, 상기 게이트 유전체, 라이너, 및 연속된 금속 피쳐는 총괄적으로 게이트, 게이트 콘택트 장벽, 및 게이트 콘택트를 형성하며,
상기 연속된 금속 피쳐는 상기 제2 ILD 내의 상기 게이트 콘택트를 포함하고, 상기 라이너는 상기 게이트 콘택트의 측벽을 커버하는, 집적회로(IC : integrated circuit) 구조체. - 집적회로 구조체의 형성 방법에 있어서,
핀을 형성하기 위해 기판을 에칭하는 단계;
상기 핀의 측벽의 적어도 일부와 상면 상에 게이트 유전체를 형성하는 단계;
상기 게이트 유전체 상에 더미 게이트를 형성하는 단계;
상기 더미 게이트 상에 ILD(interlayer dielectric)를 형성하는 단계;
상기 ILD 내에 개구(opening)를 생성하기 위해 상기 ILD를 패터닝하고, 상기 더미 게이트의 부분을 노출시키는 단계;
상기 더미 게이트를 제거하는 단계;
상기 개구의 저면과 측벽을 커버하는 라이너(liner)를 형성하는 단계; 및
상기 개구를 금속 물질로 충전시키는 단계;
를 포함하고,
상기 게이트 유전체, 라이너, 및 금속 물질은 총괄적으로 게이트, 게이트 콘택트 장벽, 및 게이트 콘택트를 형성하며,
상기 ILD 내의 상기 금속 물질은 상기 게이트 콘택트를 형성하고,
상기 라이너는 상기 핀의 상면과 측벽 상에 있고 상기 게이트 콘택트의 측벽을 커버하는,
집적회로 구조체 형성 방법. - 제9항에 있어서,
상기 게이트 유전체는 유전체층 상에 형성되고,
상기 핀을 형성하기 위해 상기 기판을 에칭하는 단계 이후에,
상기 핀의 양측면 상의 상기 기판 상에 상기 유전체층을 형성하는 단계; 및
상기 핀을 노출시키기 위해 상기 유전체층을 리세싱(recessing)하는 단계;
를 더 포함하는,
집적회로 구조체 형성 방법.
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US13/779,156 US8981496B2 (en) | 2013-02-27 | 2013-02-27 | Metal gate and gate contact structure for FinFET |
US13/779,156 | 2013-02-27 |
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KR101543508B1 true KR101543508B1 (ko) | 2015-08-11 |
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US20140239396A1 (en) | 2014-08-28 |
CN104009070A (zh) | 2014-08-27 |
KR20140107078A (ko) | 2014-09-04 |
US8981496B2 (en) | 2015-03-17 |
DE102013105608B3 (de) | 2014-02-13 |
US9331179B2 (en) | 2016-05-03 |
CN104009070B (zh) | 2017-04-12 |
US20150179756A1 (en) | 2015-06-25 |
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