KR102099747B1 - 컨택 쇼팅을 방지하는 유전체 스페이서 - Google Patents
컨택 쇼팅을 방지하는 유전체 스페이서 Download PDFInfo
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- KR102099747B1 KR102099747B1 KR1020180110362A KR20180110362A KR102099747B1 KR 102099747 B1 KR102099747 B1 KR 102099747B1 KR 1020180110362 A KR1020180110362 A KR 1020180110362A KR 20180110362 A KR20180110362 A KR 20180110362A KR 102099747 B1 KR102099747 B1 KR 102099747B1
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- isolation region
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- H10D84/0126—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs the components including insulated gates, e.g. IGFETs
- H10D84/0158—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs the components including insulated gates, e.g. IGFETs the components including FinFETs
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Abstract
Description
도 1 내지 4, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 8c, 9a, 9b, 9c, 9d, 10a, 10b, 10c, 11a, 11b, 11c, 12a, 12b, 12c, 13a, 13b, 14a, 14b, 14c 및 15는 일부 실시형태에 따른 핀 전계효과트랜지스터(FinFET)의 형성에 있어서 중간 스페이지의 사시도, 평면도 및 단면도를 도시한다.
도 16은 일부 실시형태에 따른 FinFET을 형성하는 공정 흐름도를 도시한다.
Claims (10)
- 방법에 있어서,
반도체 영역 위를 가로지르는 제1 더미 게이트 스택 및 제2 더미 게이트 스택을 형성하는 단계와,
상기 제1 더미 게이트 스택 및 제2 더미 게이트 스택을 내부에 매립하도록 층간 유전체(ILD, Inter-layer Dielectric)를 형성하는 단계와,
상기 제1 더미 게이트 스택 및 제2 더미 게이트 스택을 제1 대체 게이트 스택 및 제2 대체 게이트 스택으로 각각 대체하는 단계와,
제1 에칭 공정을 수행하여 제1 개구부를 형성하는 단계로서, 상기 제1 대체 게이트 스택의 일부와 상기 제2 대체 게이트 스택의 일부가 제거되는 것인 상기 제1 개구부 형성 단계와,
상기 제1 개구부를 충전하여 유전체 격리 영역을 형성하는 단계와,
제2 에칭 공정을 수행하여 제2 개구부를 형성하는 단계로서, 상기 ILD은 에칭되고, 상기 유전체 격리 영역은 상기 제2 개구부에 노출되는 것인 상기 제2 개구부 형성 단계와,
상기 제2 개구부에 컨택 스페이서를 형성하는 단계와,
상기 제2 개구부에 컨택 플러그를 충전하는 단계
를 포함하고, 상기 컨택 플러그는 상기 컨택 스페이서의 양측 부분 사이에 있는 것인 방법. - 제1항에 있어서, 상기 제1 에칭 공정은 상기 제1 더미 게이트 스택과 상기 제2 더미 게이트 스택 사이에서 상기 ILD의 일부를 에칭하는 단계를 더 포함하는 것인 방법.
- 제1항에 있어서, 상기 제1 에칭 공정은 상기 제1 더미 게이트 스택의 일부와 상기 제2 더미 게이트 스택의 일부 아래에 있는 격리 영역의 부분을 에칭하는 단계를 더 포함하고, 상기 격리 영역은 상기 반도체 영역 아래에 있는 반도체 기판으로 연장되는 것인 방법.
- 제1항에 있어서, 상기 제2 에칭 공정 후에, 상기 유전체 격리 영역 내의 공극(void)이 상기 제2 개구부에 연결되어 연속 개구부를 형성하는 것인 방법.
- 제1항에 있어서, 상기 컨택 플러그 충전 단계는,
상기 제2 개구부로 연장되는 일부를 포함하는 금속층을 퇴적하는 단계로서, 상기 금속층의 일부는 상기 컨택 스페이서에 의해 둘러싸이는 것인 상기 금속층 퇴적 단계와,
상기 금속층을 하부의 소스/드레인 영역과 반응시켜 규화물 영역을 형성하는 단계와,
상기 제2 개구부에 금속 영역을 충전하는 단계를 포함하는 것인 방법. - 제1항에 있어서, 상기 제2 에칭 공정에서, 상기 유전체 격리 영역이 에칭되는 것인 방법.
- 방법에 있어서,
에칭 마스크를 형성하는 단계로서, 제1 금속 게이트, 상기 제1 금속 게이트 양 측면 상의 게이트 스페이서, 및 상기 게이트 스페이서의 일측의 층간 유전체(ILD)의 일부가 상기 에칭 마스크를 통해 드러나는 것인 상기 에칭 마스크 형성 단계와,
제1 에칭 공정을 수행하여 상기 ILD에 제1 개구부를 형성하는 단계로서, 상기 제1 금속 게이트, 상기 게이트 스페이서, 및 상기 ILD의 노출된 부분이 제거되는 것인 상기 제1 개구부 형성 단계와,
상기 제1 개구부를 유전체 격리 영역으로 충전하는 단계와,
제2 에칭 공정을 수행하여 상기 ILD에 제2 개구부를 형성하는 단계로서, 상기 유전체 격리 영역은 상기 제2 개구부에 노출되고, 상기 제2 개구부를 통해 상기 제1 금속 게이트의 일측의 소스/드레인 영역이 드러나는 것인 상기 제2 개구부 형성 단계와,
상기 제2 개구부로 연장되는 유전체층을 퇴적하는 단계와,
상기 제2 개구부의 바닥부에서 상기 유전체층의 바닥 부분을 제거하는 단계
를 포함하고, 상기 제2 개구부의 측벽 상의 유전체층의 잔여 부분이 컨택 스페이서를 형성하고, 상기 컨택 스페이서는 상기 유전체 격리 영역의 측벽과 접촉하는 측벽을 갖는 것인 방법. - 디바이스에 있어서,
제1 금속 게이트와,
상기 제1 금속 게이트를 제1 부분과 제2 부분으로 분리시키는 유전체 격리 영역과,
상기 제1 금속 게이트의 제1 부분의 일측에서, 상기 제1 부분을 갖는 제1 트랜지스터를 형성하는 소스/드레인 영역과,
상기 제1 금속 게이트와 상기 소스/드레인 영역을 내부에 매립하는 층간 유전체와,
상기 층간 유전체로 연장되어 상기 소스/드레인 영역에 전기적으로 결합하는 컨택 플러그와,
상기 컨택 플러그의 양 측면 상에서 상기 컨택 플러그와 접촉하는 부분을 포함하는 유전체 컨택 스페이서
를 포함하고, 상기 유전체 컨택 스페이서는 상기 유전체 격리 영역의 측벽과 접촉하는 측벽을 갖는 것인 디바이스. - 삭제
- 제8항에 있어서, 제2 금속 게이트를 더 포함하고, 상기 유전체 격리 영역은 상기 제2 금속 게이트를 제3 부분과 제4 부분으로 또한 분리시키는 것인 디바이스.
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- 2018-07-15 DE DE102018115901.3A patent/DE102018115901B4/de active Active
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US11342444B2 (en) | 2022-05-24 |
DE102018115901B4 (de) | 2024-08-29 |
US20190393324A1 (en) | 2019-12-26 |
US20220285529A1 (en) | 2022-09-08 |
US20200013875A1 (en) | 2020-01-09 |
US12051735B2 (en) | 2024-07-30 |
CN110634799B (zh) | 2022-04-08 |
TWI701830B (zh) | 2020-08-11 |
DE102018115901A1 (de) | 2020-01-02 |
KR20200000784A (ko) | 2020-01-03 |
CN110634799A (zh) | 2019-12-31 |
TW202002280A (zh) | 2020-01-01 |
US20240347623A1 (en) | 2024-10-17 |
US11107902B2 (en) | 2021-08-31 |
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