KR101412837B1 - Finfet 및 그 제조방법 - Google Patents
Finfet 및 그 제조방법 Download PDFInfo
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Abstract
Description
도 1은 본 개시내용의 다양한 양태들에 따라 FinFET을 제조하는 방법의 흐름도이다.
도 2a 내지 도 2g는 본 개시내용의 다양한 실시예에 따른 다양한 제조 단계들에서의 FinFET의 단면도들이다.
도 3a 및 도 3b는 각각 도 2c 및 도 2d와 비교될 수 있는 제조 단계들에서의 두 개의 예시적인 통상적인 FinFET들의 단면도들이다.
Claims (10)
- 핀 전계 효과 트랜지스터(fin field effect transistor; FinFET)에 있어서,
주면을 포함한 기판;
제1 폭을 가지며 상기 기판의 주면으로부터 아랫방향으로 제1 높이까지 연장하는 복수의 제1 트렌치들로서, 인접해 있는 제1 트렌치들간의 제1 간격은 제1 핀을 정의하는 것인, 상기 복수의 제1 트렌치들; 및
상기 제1 폭보다 작은 제2 폭을 가지며 상기 기판의 주면으로부터 아랫방향으로 상기 제1 높이보다 큰 제2 높이까지 연장하는 복수의 제2 트렌치들로서, 인접해 있는 제2 트렌치들간의 제2 간격은 제2 핀을 정의하는 것인, 상기 복수의 제2 트렌치들
을 포함한, 핀 전계 효과 트랜지스터(FinFET). - 제1항에 있어서, 상기 제2 간격은 상기 제1 간격 이하인 것인, 핀 전계 효과 트랜지스터(FinFET).
- 제1항에 있어서, 상기 제1 핀은 수직한 측벽들을 포함한 것인, 핀 전계 효과 트랜지스터(FinFET).
- 제1항에 있어서, 상기 제2 핀은 테이퍼드(tapered) 측벽들을 포함한 것인, 핀 전계 효과 트랜지스터(FinFET).
- 반도체 디바이스에 있어서,
주면을 포함한 기판;
제1 핀 전계 효과 트랜지스터(fin field effect transistor; FinFET); 및
제2 FinFET
을 포함하며, 상기 제1 FinFET은,
제1 폭을 가지며 상기 기판의 주면으로부터 아랫방향으로 제1 높이까지 연장하는 복수의 제1 트렌치들로서, 인접해 있는 제1 트렌치들간의 제1 간격은 제1 핀을 정의하는 것인, 상기 복수의 제1 트렌치들; 및
상기 제1 핀의 윗면과 측벽들상의 제1 게이트 유전체; 및
상기 제1 게이트 유전체 상의 제1 게이트 전극
을 포함하며, 상기 제2 FinFET은,
제1 폭보다 작은 제2 폭을 가지며 상기 기판의 주면으로부터 아랫방향으로 상기 제1 높이보다 큰 제2 높이까지 연장하는 복수의 제2 트렌치들로서, 인접해 있는 제2 트렌치들간의 제2 간격은 제2 핀을 정의하는 것인, 상기 복수의 제2 트렌치들;
상기 제2 핀의 윗면과 측벽들상의 제2 게이트 유전체; 및
상기 제2 게이트 유전체 상의 제2 게이트 전극을 포함한 것인, 반도체 디바이스. - 반도체 디바이스를 제조하는 방법에 있어서,
주면을 포함한 기판 위에 패턴화된 하드마스크층을 형성하는 단계; 및
90℃와 120℃ 사이의 정전척(electrostatic chuck; ESC) 온도에서 수행되는, 복수의 제1 트렌치들과 복수의 제2 트렌치들을 형성하는 단계
를 포함하며, 상기 복수의 제1 트렌치들은 제1 폭을 가지며 상기 기판의 주면으로부터 아랫방향으로 제1 높이까지 연장하며, 상기 복수의 제2 트렌치들은 상기 제1 폭보다 작은 제2 폭을 가지며 상기 기판의 주면으로부터 아랫방향으로 상기 제1 높이보다 큰 제2 높이까지 연장한 것인, 반도체 디바이스 제조 방법. - 제6항에 있어서, 상기 복수의 제1 트렌치들과 복수의 제2 트렌치들의 형성 단계는 NF3, CF4, 및 SF6로부터 선택된 화학물질을 에칭 가스로서 이용하여 수행되는 것인, 반도체 디바이스 제조 방법.
- 제6항에 있어서, 상기 복수의 제1 트렌치들과 복수의 제2 트렌치들의 형성 단계는 2mTorr 내지 20mTorr의 압력하에서 수행되는 것인, 반도체 디바이스 제조 방법.
- 제6항에 있어서, 상기 복수의 제1 트렌치들과 복수의 제2 트렌치들의 형성 단계는 500 내지 1000W의 소스 전력하에서 수행되는 것인, 반도체 디바이스 제조 방법.
- 제6항에 있어서, 상기 복수의 제1 트렌치들과 복수의 제2 트렌치들의 형성 단계는 펄스 바이어스 전압하에서 수행되는 것인, 반도체 디바이스 제조 방법.
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