KR102801217B1 - 반도체 장치 - Google Patents
반도체 장치 Download PDFInfo
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Abstract
Description
도 2 내지 도 4는 예시적인 실시예들에 따른 반도체 장치를 도시하는 단면도들이다.
도 5a 내지 도 5b는 예시적인 실시예들에 따른 반도체 장치를 도시하는 단면도들이다.
도 6 내지 도 8는 예시적인 실시예들에 따른 반도체 장치를 도시하는 단면도들이다.
도 9은 예시적인 실시예들에 따른 반도체 장치를 도시하는 일부 단면도이다.
도 10 내지 도 24는 예시적인 실시예들에 따른 반도체 장치의 제조 방법을 설명하기 위하여 공정 순서에 따라 도시한 도면들이다.
110: 소자분리층 120: 희생층
130: 내부 스페이서층 140: 채널 구조물
141, 142, 143: 채널층 150: 소스/드레인 영역
160: 게이트 구조물 162: 게이트 유전층
164: 게이트 스페이서층 164a: 분리 스페이서층
165: 게이트 전극 166: 게이트 캡핑층
170: 희생 게이트 구조물 180: 콘택 플러그
190: 하부 절연층 195: 상부 절연층
200a: 분리 구조물 TR1: 제1 트랜지스터 영역
TR2: 제2 트랜지스터 영역 SR: 분리 영역
Claims (10)
- 기판 상에서 제1 방향으로 연장되고, 상기 기판의 상면에 수직한 수직 방향에서 상기 기판으로부터 돌출된 활성 영역;
상기 활성 영역 상에 수직하게 서로 이격되어 배치되는 복수의 채널층들;
상기 기판 상에서 상기 활성 영역 및 상기 복수의 채널층들과 교차하고, 상기 제1 방향과 수직한 제2 방향으로 연장되며, 상기 복수의 채널층들을 둘러싸는 게이트 구조물들;
상기 게이트 구조물들의 적어도 일측에서 상기 활성 영역 상에 배치되며, 상기 복수의 채널층들과 접촉되는 소스/드레인 영역들;
상기 소스/드레인 영역들 상에서 상기 게이트 구조물들의 측면들 사이에 배치되는 하부 절연층;
상기 기판 상에서 상기 활성 영역과 교차하여 상기 제2 방향으로 연장되며, 서로 인접하는 상기 소스/드레인 영역들 사이에 배치되는 분리 구조물;
상기 하부 절연층, 상기 게이트 구조물들, 및 상기 분리 구조물 각각의 상면을 덮는 상부 절연층; 및
상기 하부 절연층 및 상부 절연층을 관통하여 상기 소스/드레인 영역들에 접촉되는 콘택 플러그들을 포함하며,
상기 콘택 플러그들은 상기 소스/드레인 영역들의 상면 아래로 연장되고,
상기 분리 구조물의 하부 영역의 제1 폭은 상기 분리 구조물의 상기 하부 영역으로부터 상부로 연장되는 상부 영역의 제2 폭보다 작고,
상기 분리 구조물의 상기 하부 영역은 상기 수직 방향으로 상기 복수의 채널층들 중 하나의 두께보다 더 큰 깊이로 상기 활성 영역을 리세스하여 상기 활성 영역의 측면들과 접촉하고,
상기 게이트 구조물들의 각각은 게이트 전극 및 상기 게이트 전극 상의 게이트 캡핑층을 포함하고, 상기 분리 구조물과 상기 게이트 캡핑층은 서로 다른 물질을 포함하고,
상기 제1 방향에서, 상기 분리 구조물은 상기 게이트 캡핑층과 중첩되는 영역을 포함하는 반도체 장치.
- 제1 항에 있어서,
상기 분리 구조물은 SiOC를 포함하고, 상기 게이트 캡핑층은 SiN을 포함하는 반도체 장치.
- 제1 항에 있어서,
상기 분리 구조물은 SiO, SiN, SiCN, SiOC, SiON, 및 SiOCN 중 적어도 하나를 포함하는 반도체 장치.
- 제1 항에 있어서,
상기 분리 구조물의 양 측면들은 서로 인접하는 상기 소스/드레인 영역들과 각각 접하는 반도체 장치.
- 제1 항에 있어서,
상기 게이트 구조물들의 각각은 상기 게이트 전극의 양 측면들 상에 배치되는 스페이서층들을 더 포함하고,
상기 스페이서층들은 적어도 일부가 상기 분리 구조물의 양 측면들 상에 배치되는 반도체 장치.
- 제 5 항에 있어서,
상기 스페이서층들의 상면, 상기 게이트 캡핑층의 상면, 및 상기 분리 구조물의 상면은 공면을 이루는 반도체 장치.
- 기판의 상면에 수직한 수직 방향에서 상기 기판으로부터 돌출되는 활성 영역;
상기 활성 영역 상에 제1 방향에서 서로 이격되고, 상기 활성 영역 상의 복수의 채널층들을 포함하는 채널 구조물, 상기 채널 구조물을 둘러싸는 게이트 구조물, 상기 활성 영역 상에서 상기 채널 구조물과 접촉되는 소스/드레인 영역들, 상기 채널 구조물 사이에서 상기 게이트 구조물과 나란하게 배치되는 내부 스페이서층들을 각각 포함하는 복수의 트랜지스터들; 및
상기 게이트 구조물 및 상기 채널 구조물을 관통하여 상기 활성 영역의 하단 아래로 연장되고, 상기 복수의 트랜지스터들을 서로 분리시키는 분리 구조물을 포함하되,
상기 분리 구조물의 하부 영역의 제1 폭은 상기 분리 구조물의 상기 하부 영역으로부터 상부로 연장되는 상부 영역의 제2 폭보다 작고,
상기 분리 구조물의 상기 하부 영역은 상기 수직 방향으로 상기 복수의 채널층들 중 하나의 두께보다 더 큰 깊이로 상기 활성 영역을 리세스하여 상기 활성 영역의 측면들과 접촉하고,
상기 게이트 구조물은 게이트 전극 및 상기 게이트 전극 상의 게이트 캡핑층을 포함하고, 상기 분리 구조물의 상면은 상기 게이트 전극의 상면보다 높게 위치하고,
상기 분리 구조물은 상기 게이트 전극, 상기 채널 구조물, 및 상기 내부 스페이서층들 중 적어도 하나와 접촉되는 반도체 장치.
- 제7 항에 있어서,
상기 게이트 캡핑층의 상면은 상기 분리 구조물의 상면과 공면을 이루는 반도체 장치.
- 제7 항에 있어서,
상기 게이트 구조물은 상기 게이트 전극의 양 측면들 상의 게이트 스페이서층들을 더 포함하고,
상기 게이트 스페이서층들의 상면은 상기 분리 구조물의 상면과 공면을 이루는 반도체 장치.
- 제7 항에 있어서,
상기 분리 구조물의 상면의 상기 제1 방향에서의 폭은 상기 게이트 전극의 상기 제1 방향에서의 폭보다 큰 반도체 장치.
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