KR101312747B1 - 복수의 임계 전압을 가진 finfet들 - Google Patents
복수의 임계 전압을 가진 finfet들 Download PDFInfo
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- KR101312747B1 KR101312747B1 KR1020120014310A KR20120014310A KR101312747B1 KR 101312747 B1 KR101312747 B1 KR 101312747B1 KR 1020120014310 A KR1020120014310 A KR 1020120014310A KR 20120014310 A KR20120014310 A KR 20120014310A KR 101312747 B1 KR101312747 B1 KR 101312747B1
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- metal layer
- semiconductor fin
- gate electrode
- work function
- layer
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- 229910052751 metal Inorganic materials 0.000 claims description 113
- 239000002184 metal Substances 0.000 claims description 113
- 238000000034 method Methods 0.000 claims description 26
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- 229910000577 Silicon-germanium Inorganic materials 0.000 description 2
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- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 2
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- 238000002955 isolation Methods 0.000 description 2
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- 125000006850 spacer group Chemical group 0.000 description 2
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
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- 229910017052 cobalt Inorganic materials 0.000 description 1
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- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
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- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
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- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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Abstract
Description
도 1 내지 도 6b는 게이트 퍼스트(gate-first) 방법을 채용하여 핀 전계효과 트랜지스터(FinFET)를 형성하는, 일부 예시적인 실시예에 따른 FinFET의 제조시의 중간 단계들을 보인 횡단면도들이다.
도 7 내지 도 10은 게이트 라스트(gate-last) 방법을 채용하여 FinFET를 형성하는, 일부 예시적인 실시예에 따른 FinFET의 제조시의 중간 단계들을 보인 횡단면도들이다.
Claims (10)
- 기판;
상기 기판 위의 반도체 핀(semiconductor fin);
상기 반도체 핀의 상부 표면 및 측벽들 상의 게이트 유전체 층; 및
상기 게이트 유전체 층에 의해 상기 반도체 핀으로부터 이격된 게이트 전극을 포함하고, 상기 게이트 전극은 상기 반도체 핀 위에서 상기 반도체 핀에 정렬된 상위부 및 상기 유전체 층의 측벽부 상의 측벽부를 포함하고, 상기 게이트 전극의 상위부는 제1 일함수를 가지고, 상기 게이트 전극의 측벽부는 상기 제1 일함수와는 다른 제2 일함수를 가지고,
상기 게이트 전극은
상기 반도체 핀 위에서 상기 반도체 핀에 정렬되고, 상기 반도체 핀의 측면들로는 연장되지 않는 제1 금속층; 및
상기 반도체 핀 위에서 상기 반도체 핀에 정렬된 제1 부분 및 상기 반도체 핀의 측면들 상으로 연장된 제2 부분들을 포함하는 제2 금속층을 포함하고, 상기 제1 금속층 및 상기 제2 금속층은 다른 물질들을 포함하는 것인 소자. - 삭제
- 기판과;
상기 기판 위에 형성되고 핀 전계효과 트랜지스터(Fin Field-Effect Transistor; FinFET)의 일부인 반도체 핀과;
상기 반도체 핀의 상부 표면 및 측벽들상의 게이트 유전체 층과;
상기 게이트 유전체 층에 의해 상기 반도체 핀으로부터 이격된 게이트 전극
을 포함하고, 상기 게이트 전극은,
상기 반도체 핀 위에서 상기 반도체 핀에 정렬되지만 상기 반도체 핀의 상부 표면보다 낮은 위치에서는 실질적인 부분들을 갖지 않는 제1 금속층과;
상기 제1 금속층 위에서 상기 제1 금속층에 정렬된 제1 부분 및 상기 반도체 핀의 상부 표면보다 더 낮은 위치에 있는 제2 부분들을 포함한 제2 금속층
을 포함하며, 상기 제1 금속층과 상기 제2 금속층은 상이한 물질들로 구성되고, 상기 제1 금속층과 상기 제2 금속층의 제1 부분은 상기 FinFET의 게이트 전극의 상위부를 형성하고, 상기 제2 금속층의 제2 부분들은 상기 FinFET의 게이트 전극의 측벽부들을 형성하는 것인 소자. - 제3항에 있어서, 상기 제1 금속층은 제1 일함수를 갖고, 상기 제2 금속층은 제2 일함수를 가지며, 상기 제1 일함수는 상기 제2 일함수보다 큰 것인 소자.
- 제3항에 있어서, 상기 제1 금속층은 제1 일함수를 갖고, 상기 제2 금속층은 제2 일함수를 가지며, 상기 제1 일함수는 상기 제2 일함수보다 작은 것인 소자.
- 반도체 핀의 상부 표면 위의 상위부 및 상기 반도체 핀의 측벽들상의 측벽부들을 포함한 게이트 유전체를 상기 반도체 핀 위에 형성하는 단계와;
상기 게이트 유전체의 측벽부들로 연장하는 부분들을 포함하지 않는 제1 금속층을 상기 게이트 유전체의 상부 표면 위에 형성하는 단계와;
상기 제1 금속층 위의 제1 부분 및 상기 게이트 유전체의 측벽부들상으로 연장하는 제2 부분들을 포함하는 제2 금속층을 형성하는 단계
를 포함하며, 상기 제1 금속층과 상기 제2 금속층은 상이한 물질들로 구성된 것인 방법. - 제6항에 있어서, 상기 제1 금속층을 형성하는 단계는 비순응적(non-conformal) 배치 방법을 이용하여 수행되는 것인 방법.
- 제6항에 있어서, 상기 제1 금속층을 형성하는 단계는 상기 제1 금속층을 증착하는 단계와, 에칭 단계를 수행하여 상기 게이트 유전체의 측벽부들상의 상기 제1 금속층의 부분들을 제거하는 단계를 포함한 것인 방법.
- 제6항에 있어서, 상기 제1 금속층과 상기 제2 금속층의 제1 부분은 게이트 전극의 상위부를 형성하고, 상기 제2 금속층의 제2 부분들은 상기 게이트 전극의 제2 부분들을 형성하며, 상기 게이트 전극의 상위부와 상기 게이트 전극의 제2 부분들은 상이한 일함수들을 갖는 것인 방법.
- 제6항에 있어서, 상기 게이트 유전체를 형성하는 단계 후 및 상기 제1 금속층을 형성하는 단계 전에, 상기 게이트 유전체 위에 캡핑층을 형성하는 단계를 더 포함하고, 상기 제1 금속층과 상기 제2 금속층은 모두 상기 캡핑층과 접촉하는 것인 방법.
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US9472638B2 (en) | 2016-10-18 |
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US10020230B2 (en) | 2018-07-10 |
US20150349080A1 (en) | 2015-12-03 |
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