KR102620595B1 - 소자분리막을 갖는 반도체 소자 및 그 제조 방법 - Google Patents
소자분리막을 갖는 반도체 소자 및 그 제조 방법 Download PDFInfo
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Abstract
Description
도 12 내지 도 20은 본 개시의 다른 실시예에 의한 반도체 소자 제조 방법을 설명하기 위한 중간 단계의 도면이다.
도 21 내지 도 26은 도 11 또는 도 20 이후에 진행되는 반도체 소자 제조 방법을 설명하기 위한 도면이다.
도 27은 본 개시의 실시예에 따른 반도체 소자의 사시도이다.
도 28는 도 27의 반도체 소자의 I-I' 및 II-II'에 대한 단면도이다.
도 29 내지 도 38는 본 개시의 또 다른 실시예에 의한 반도체 소자 제조 방법을 설명하기 위한 중간 단계의 도면이다.
151a: 홈 103, 152: 오목부
102, 104: 볼록부 153: 돌출부
201, 211, 221, 251, 261: 제1 반도체층
202, 212, 222, 252, 262: 제2 반도체층
200, 250: 적층체 201a, 211a, 251a, 261a: 제1 희생층
202a, 212a, 252a, 262a: 제2 희생층
210, 250: 적층 구조체 220,260: 핀형 구조체
300: 마스크 패턴 301: 맨드릴 패턴
302, 352: 스페이서 패턴 400, 450: 제1 라이너
500, 550: 제1 소자분리막 510, 560: 제2 소자분리막
Claims (10)
- 기판을 준비하는 단계;
상기 기판의 상면에 오목부 및 볼록부를 형성하는 단계;
상기 기판 상에, 상기 기판과 접하는 제1 희생층 패턴과, 상기 제1 희생층 패턴과 오버랩 되지 않는 오버행 부분을 포함하며 제1 예비 반도체 패턴과 제2 예비 반도체 패턴이 교대로 적층되는 예비 적층 구조체를 형성하되, 상기 예비 적층 구조체의 최하층을 제2 예비 희생층 패턴으로 형성하는 단계;
상기 예비 적층 구조체의 최하층을 일부 식각하여 제2 희생층 패턴을 형성하고, 하면에서 상기 제1 예비 반도체 패턴이 노출되는 적층 구조체를 형성하는 단계; 및
상기 기판의 상기 볼록부 및 상기 오목부를 덮는 제1 소자분리막을 형성하는 단계를 포함하는 반도체 소자 제조 방법. - 제1항에 있어서,
상기 제1 희생층 패턴과 상기 예비 적층 구조체를 형성하는 단계는,
상기 기판 상에, 제1 반도체층과 제2 반도체층이 교대로 적층되는 적층체를 형성하되, 상기 적층체의 최하층인 제1 희생층을 상기 제1 반도체층으로 형성하는 단계;
상기 적층체 상에, 제1 폭을 가지는 맨드릴 패턴과 상기 맨드릴 패턴의 측벽 상에 형성되는 스페이서 패턴을 포함하는 마스크 패턴을 형성하는 단계;
상기 마스크 패턴을 식각 마스크로 하고 상기 제1 희생층을 식각 정지막으로 하여, 상기 적층체를 식각하여 상기 예비 적층 구조체 사이에 배치되는 제1 예비 트렌치를 형성하는 단계;
상기 제1 예비 트렌치 내에 제1 라이너를 형성하는 단계;
상기 제1 라이너를 이방성 식각하여, 상기 제1 예비 트렌치를 리세스 하여 제1 트렌치와 제1 예비 희생층 패턴을 형성하는 단계;
상기 제1 트렌치를 통해 상기 제1 예비 희생층 패턴의 측면을 식각하여, 상기 기판과 상기 오버행 부분의 사이에 개재되는 빈 공간을 가지는 리세스된 제1 트렌치를 형성하는 단계를 포함하는 반도체 소자 제조 방법. - 제2항에 있어서,
상기 제1 희생층 패턴과 상기 제2 희생층 패턴은 상기 제1 폭 보다 상대적으로 좁은 제2 폭을 가지는 반도체 소자 제조 방법. - 제2항에 있어서,
상기 제1 소자분리막은 상기 리세스된 제1 트렌치를 채우는 반도체 소자 제조 방법. - 제2항에 있어서,
상기 맨드릴 패턴을 제거하여 상기 스페이서 패턴 사이에 상기 적층 구조체의 상면을 노출시키는 제2 예비 트렌치를 형성하는 단계;
상기 스페이서 패턴을 식각 마스크로 하여, 상기 적층 구조체를 이방성 식각하여 제1 반도체 패턴과 제2 반도체 패턴이 교대로 적층되는 핀형 구조체를 형성하고, 상기 핀형 구조체 사이에 배치되는 제2 트렌치를 형성하는 단계를 포함하는 반도체 소자 제조 방법. - 기판 상에, 제1 방향으로 연장되며, 상기 제1 방향과 다른 제2 방향을 따라 서로 이격되어 형성되되, 상기 제2 방향으로 가장 가까운 거리에 위치하는 한 쌍의 와이어 패턴;
상기 기판 상에, 상기 제2 방향을 따라 연장되며, 상기 와이어 패턴을 감싸는 게이트 전극;
상기 기판과 상기 게이트 전극 사이에, 상기 제1 방향을 따라 연장되며, 상기 제2 방향을 따라 이격되어 형성되되, 상기 한 쌍의 와이어 패턴과 제3 방향으로 오버랩되어 형성되는 제1 소자분리막들; 및
상기 제2 방향을 따라 이격되는 제1 소자분리막 사이에 형성되며, U자 형상의 단면을 가지는 라이너를 포함하며,
상기 기판의 상면은 오목부 및 볼록부를 포함하며,
상기 제1 소자분리막은 상기 기판의 상기 오목부 및 상기 볼록부를 덮는 반도체 소자.
- 제6항에 있어서,
상기 라이너는,
상기 제2 방향을 따라 반복적으로 형성되는 상기 한 쌍의 와이어 패턴 사이의 공간과 제3 방향으로 오버랩되어 형성되는 반도체 소자.
- 제6항에 있어서,
상기 제1 소자분리막은 상기 제2 방향을 따라 서로 이격되어 형성되는 오목부 및 볼록부를 포함하고,
상기 볼록부 상에 소스/드레인 패턴이 형성되는 반도체 소자.
- 제6항에 있어서,
상기 기판의 상면은 요철 형상인 반도체 소자.
- 제6항에 있어서,
상기 게이트 전극과 상기 제1 소자분리막 사이에 배치되며 상기 제1 소자분리막의 상면과 상기 라이너의 상면을 덮는 게이트 유전층을 더 포함하는 반도체 소자.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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KR1020180007813A KR102620595B1 (ko) | 2018-01-22 | 2018-01-22 | 소자분리막을 갖는 반도체 소자 및 그 제조 방법 |
US16/035,906 US10734273B2 (en) | 2018-01-22 | 2018-07-16 | Semiconductor device including isolation layers and method of manufacturing the same |
CN201811207725.2A CN110071174B (zh) | 2018-01-22 | 2018-10-17 | 包括隔离层的半导体器件及制造其的方法 |
US16/915,050 US11101166B2 (en) | 2018-01-22 | 2020-06-29 | Semiconductor device including isolation layers and method of manufacturing the same |
US17/410,149 US11557504B2 (en) | 2018-01-22 | 2021-08-24 | Semiconductor device including isolation layers and method of manufacturing the same |
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KR1020180007813A KR102620595B1 (ko) | 2018-01-22 | 2018-01-22 | 소자분리막을 갖는 반도체 소자 및 그 제조 방법 |
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US11101166B2 (en) | 2021-08-24 |
US20210384068A1 (en) | 2021-12-09 |
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