KR101821304B1 - 멀티-패터닝 애플리케이션들을 위한 광학적으로 튜닝된 하드마스크 - Google Patents
멀티-패터닝 애플리케이션들을 위한 광학적으로 튜닝된 하드마스크 Download PDFInfo
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- KR101821304B1 KR101821304B1 KR1020157034419A KR20157034419A KR101821304B1 KR 101821304 B1 KR101821304 B1 KR 101821304B1 KR 1020157034419 A KR1020157034419 A KR 1020157034419A KR 20157034419 A KR20157034419 A KR 20157034419A KR 101821304 B1 KR101821304 B1 KR 101821304B1
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Abstract
Description
[0014] 도 1은, 삼-층 에칭을 사용하여 하드마스크 층을 멀티-패터닝하기 위한 통상적인 사이클을 도시한다.
[0015] 도 2는, 단일-층 에칭을 사용하여 하드마스크 층을 멀티-패터닝하기 위한 본원에서의 실시예를 도시한다.
[0016] 도 3은, 하드마스크 층을 형성할 수 있는 프로세스 챔버의 일 실시예의 단면도를 도시한다.
[0017] 도 4a 내지 도 4m은, 단일-층 에칭을 사용하여 하드마스크 층을 멀티-패터닝하기 위한 프로세스 흐름을 도시한다.
[0018] 도 5는, 인-시튜 및 원격 플라즈마 활성화된 O2를 이용한 애싱으로부터의 하드마스크 층에 대한 변화들을 도시한다.
[0019] 도 6은, 인-시튜 및 원격 플라즈마 활성화된 H2/N2를 이용한 애싱으로부터의 하드마스크 층에 대한 변화들을 도시한다.
[0020] 도 7은, 기판 상에 멀티-패터닝된 하드마스크를 리소그래피로 생성하는데 적합한 예시적인 클러스터 툴(700)을 예시한다.
[0021] 실시예들의 이해를 용이하게 하기 위하여, 도면들에 대해 공통인 동일한 엘리먼트들을 지시하기 위해 가능한 경우에 동일한 참조 번호들이 사용되었다. 일 실시예의 엘리먼트들 및 피처들이 추가적인 설명 없이 다른 실시예들에 유익하게 포함될 수 있다는 것이 고려된다.
[0022] 그러나, 첨부된 도면들은 단지 예시적인 실시예들을 도시하는 것이므로 본 발명의 범위를 제한하는 것으로 간주되지 않아야 한다는 것이 주목되어야 하는데, 이는 본 발명이 다른 균등하게 유효한 실시예들을 허용할 수 있기 때문이다.
Claims (30)
- 막 스택(stack) 상에 하드마스크를 형성하기 위한 방법으로서,
챔버에 배치된 타겟으로부터 기판의 표면 상으로 실리콘을 포함하는 재료를 스퍼터링하는 단계; 및
상기 타겟으로부터 상기 재료를 스퍼터링하면서, 프로세스 가스의 유동을 전달하는 단계 ― 상기 프로세스 가스는 산소, 수소 및 질소를 포함하고, 상기 프로세스 가스에서의 산소 대 질소의 비율이 조정됨으로써 의도된(intended) 리소그래피(lithography) 노광 파장에서, 스퍼터링된 재료의 굴절률 및 흡광 계수와 포토-레지스트 층의 굴절률 및 흡광 계수가 상기 포토-레지스트 층의 단일 층만을 사용하여 상기 스퍼터링된 재료가 반복적으로 패터닝될 수 있게 할 정도로 유사하게 되고, 상기 포토-레지스트 층은 상기 스퍼터링된 재료의 표면 상에 배치됨 ―
를 포함하는,
하드마스크를 형성하기 위한 방법. - 삭제
- 제 1 항에 있어서,
상기 프로세스 가스는 탄소를 더 포함하는,
하드마스크를 형성하기 위한 방법. - 제 1 항에 있어서,
패턴 정렬 파장에서 상기 스퍼터링된 재료의 굴절률 및 흡광 계수는 상기 포토-레지스트 층의 굴절률 및 흡광 계수와 상이한,
하드마스크를 형성하기 위한 방법. - 제 1 항에 있어서,
상기 스퍼터링된 재료는 실리콘, 질소, 산소, 및 수소를 포함하고, 상기 스퍼터링된 재료의 표면에서의 수소의 농도가, 상기 스퍼터링된 재료의 두께에 걸친 평균 수소 농도 미만이거나, 또는 상기 스퍼터링된 재료의 표면에서의 질소의 농도가, 상기 스퍼터링된 재료의 두께에 걸친 평균 질소 농도 미만인,
하드마스크를 형성하기 위한 방법. - 막 스택 상에 하드마스크를 형성하기 위한 방법으로서,
챔버에 배치된 타겟으로부터 기판의 표면 상으로 실리콘을 포함하는 재료를 스퍼터링하는 단계;
상기 타겟으로부터 상기 재료를 스퍼터링하면서, 프로세스 가스의 유동을 전달하는 단계 ― 상기 프로세스 가스는 산소 및 질소를 포함하고, 상기 프로세스 가스에서의 산소 대 질소의 비율이 조정됨으로써 의도된 리소그래피 노광 파장에서, 스퍼터링된 재료의 굴절률 및 흡광 계수와 포토-레지스트 층의 굴절률 및 흡광 계수가 상기 포토-레지스트 층의 단일 층만을 사용하여 상기 스퍼터링된 재료가 반복적으로 패터닝될 수 있게 할 정도로 유사하게 되고, 상기 포토-레지스트 층은 상기 스퍼터링된 재료의 표면 상에 배치됨 ―;
제 1 가스를 이온화시키기 위해, 상기 기판의 표면 위에 플라즈마를 생성하는 단계; 및 그 후에,
이온화된 제 1 가스가 상기 기판의 표면에 충격을 가하게 하기 위해, 상기 챔버의 부분에 커플링된 전극을 바이어싱하는 단계 ― 상기 전극을 바이어싱하는 단계는 상기 재료를 스퍼터링하는 단계 후에 수행됨 ―
를 포함하는,
하드마스크를 형성하기 위한 방법. - 제 1 항에 있어서,
상기 스퍼터링된 재료의 표면 상에 직접적으로 상기 포토-레지스트 층을 증착하는 단계를 더 포함하며, 상기 증착된 포토-레지스트 층은, 193 nm의 파장에서, 1.5 내지 1.8의 굴절률 및 0.00 내지 0.12의 흡광 계수 모두를 갖는,
하드마스크를 형성하기 위한 방법. - 제 1 항에 있어서,
상기 스퍼터링된 재료의 표면 상에 직접적으로 상기 포토-레지스트 층을 증착하는 단계 ― 상기 포토-레지스트 층은 제 1 포토-레지스트 층을 포함함 ―;
상기 제 1 포토-레지스트 층을 사용하여, 상기 스퍼터링된 재료를 패터닝하는 단계;
패터닝된 스퍼터링된 재료의 표면 상에 직접적으로 제 2 포토-레지스트 층을 증착하는 단계 ― 상기 제 2 포토-레지스트 층의 리소그래피 노광 파장에서, 상기 제 2 포토-레지스트 층의 굴절률 및 흡광 계수와 상기 패터닝된 스퍼터링된 재료의 굴절률 및 흡광 계수는 상기 제 2 포토-레지스트 층의 단일 층만을 사용하여 상기 패터닝된 스퍼터링된 재료가 반복적으로 패터닝될 수 있을 정도로 유사함 ―; 및
상기 제 2 포토-레지스트 층을 사용하여, 상기 스퍼터링된 재료를 패터닝하는 단계
를 더 포함하는,
하드마스크를 형성하기 위한 방법. - 제 1 항에 있어서,
상기 스퍼터링된 재료의 표면 상에 직접적으로 상기 포토-레지스트 층을 증착하는 단계;
상기 포토-레지스트 층에 패턴을 형성하기 위해, 상기 포토-레지스트 층 상에 리소그래피 동작을 수행하는 단계;
상기 스퍼터링된 재료에서, 형성된 패턴을 에칭하는 단계; 및
상기 포토-레지스트 층을 제거하는 단계
를 더 포함하며,
상기 포토-레지스트 층을 제거하는 단계는, 원격 O2 플라즈마 또는 원격 H2/N2 플라즈마를 사용하여, 상기 포토-레지스트 층을 애싱(ashing)하는 단계를 포함하는,
하드마스크를 형성하기 위한 방법. - 삭제
- 삭제
- 삭제
- 삭제
- 삭제
- 삭제
- 막 스택 상에 하드마스크를 형성하기 위한 방법으로서,
챔버에 배치된 타겟으로부터 기판의 표면 상으로 실리콘을 포함하는 재료를 스퍼터링하는 단계;
상기 타겟으로부터 상기 재료를 스퍼터링하면서, 프로세스 가스의 유동을 전달하는 단계 ― 상기 프로세스 가스는 산소 및 질소를 포함하고, 상기 프로세스 가스에서의 산소 대 질소의 비율이 조정됨으로써 의도된 리소그래피 노광 파장에서, 스퍼터링된 재료의 굴절률 및 흡광 계수와 포토-레지스트 층의 굴절률 및 흡광 계수가 상기 포토-레지스트 층의 단일 층만을 사용하여 상기 스퍼터링된 재료가 반복적으로 패터닝될 수 있게 할 정도로 유사하게 되고, 상기 포토-레지스트 층은 상기 스퍼터링된 재료의 표면 상에 배치됨 ―; 및
상기 스퍼터링된 재료의 표면 상에 직접적으로 상기 포토-레지스트 층을 증착하는 단계
를 포함하는,
하드마스크를 형성하기 위한 방법. - 제 16 항에 있어서,
상기 스퍼터링된 재료와 상기 포토-레지스트 층은, 상기 의도된 리소그래피 노광 파장에서, 모두 동일한 굴절률 및 동일한 흡광 계수를 가지는,
하드마스크를 형성하기 위한 방법. - 막 스택 상에 하드마스크를 형성하기 위한 방법으로서,
챔버에 배치된 타겟으로부터 기판의 표면 상으로 실리콘을 포함하는 재료를 스퍼터링하는 단계; 및
상기 타겟으로부터 상기 재료를 스퍼터링하면서, 프로세스 가스의 유동을 전달하는 단계 ― 상기 프로세스 가스는 산소 및 질소를 포함하고, 상기 프로세스 가스에서의 산소 대 질소의 비율이 조정됨으로써 의도된 리소그래피 노광 파장에서, 스퍼터링된 재료의 굴절률 및 흡광 계수와 포토-레지스트 층의 굴절률 및 흡광 계수가 상기 포토-레지스트 층의 단일 층만을 사용하여 상기 스퍼터링된 재료가 반복적으로 패터닝될 수 있게 할 정도로 유사하게 되고, 상기 포토-레지스트 층은 상기 스퍼터링된 재료의 표면 상에 배치됨 ―
를 포함하는,
하드마스크를 형성하기 위한 방법. - 삭제
- 제 18 항에 있어서,
상기 노광 파장은 193 nm 인,
하드마스크를 형성하기 위한 방법. - 제 18 항에 있어서,
상기 프로세스 가스는 탄소를 더 포함하는,
하드마스크를 형성하기 위한 방법. - 제 18 항에 있어서,
패턴 정렬 파장에서 상기 스퍼터링된 재료의 굴절률 또는 흡광 계수는 상기 포토-레지스트의 굴절률 또는 흡광 계수와 다른,
하드마스크를 형성하기 위한 방법. - 제 18 항에 있어서,
상기 스퍼터링된 재료는 실리콘, 질소, 산소, 및 수소를 포함하고, 상기 스퍼터링된 재료의 표면에서의 수소의 농도가, 상기 스퍼터링된 재료의 두께에 걸친 평균 수소 농도 미만이거나, 또는 상기 스퍼터링된 재료의 표면에서의 질소의 농도가, 상기 스퍼터링된 재료의 두께에 걸친 평균 질소 농도 미만인,
하드마스크를 형성하기 위한 방법. - 제 18 항에 있어서,
상기 기판의 표면의 소수성(hydrophobicity)을 증가시키기 위해, 상기 챔버의 부분에 커플링된 전극을 바이어싱하는 단계
를 더 포함하는,
하드마스크를 형성하기 위한 방법. - 제 18 항에 있어서,
상기 스퍼터링된 재료의 표면 상에 직접적으로 상기 포토-레지스트 층을 증착하는 단계
를 더 포함하는,
하드마스크를 형성하기 위한 방법. - 제 25 항에 있어서,
상기 증착된 포토-레지스트 층은, 193 nm의 파장에서, 1.5 내지 1.8의 굴절률 및 0.00 내지 0.12의 흡광 계수 모두를 갖는,
하드마스크를 형성하기 위한 방법. - 제 18 항에 있어서,
상기 스퍼터링된 재료의 표면 상에 직접적으로 상기 포토-레지스트 층을 증착하는 단계 ― 상기 포토-레지스트 층은 제 1 포토-레지스트 층을 포함함 ―;
상기 제 1 포토-레지스트 층을 사용하여, 상기 스퍼터링된 재료를 패터닝하는 단계;
패터닝된 스퍼터링된 재료의 표면 상에 직접적으로 제 2 포토-레지스트 층을 증착하는 단계 ― 상기 제 2 포토-레지스트 층의 리소그래피 노광 파장에서, 상기 제 2 포토-레지스트 층의 굴절률 및 흡광 계수와 상기 패터닝된 스퍼터링된 재료의 굴절률 및 흡광 계수는 상기 제 2 포토-레지스트 층의 단일 층만을 사용하여 상기 패터닝된 스퍼터링된 재료가 반복적으로 패터닝될 수 있을 정도로 유사함 ―; 및
상기 제 2 포토-레지스트 층을 사용하여, 상기 스퍼터링된 재료를 패터닝하는 단계
를 더 포함하는,
하드마스크를 형성하기 위한 방법. - 제 18 항에 있어서,
상기 스퍼터링된 재료의 표면 상에 직접적으로 상기 포토-레지스트 층을 증착하는 단계;
상기 포토-레지스트 층에 패턴을 형성하기 위해, 상기 포토-레지스트 층 상에 리소그래피 동작을 수행하는 단계;
상기 스퍼터링된 재료에서, 형성된 패턴을 에칭하는 단계; 및
상기 포토-레지스트 층을 제거하는 단계
를 더 포함하며,
상기 포토-레지스트 층을 제거하는 단계는, 원격 O2 플라즈마 또는 원격 H2/N2 플라즈마를 사용하여, 상기 포토-레지스트 층을 애싱(ashing)하는 단계를 포함하는,
하드마스크를 형성하기 위한 방법. - 막 스택(stack) 상에 하드마스크를 형성하기 위한 방법으로서,
챔버에 배치된 타겟으로부터 기판의 표면 상으로 실리콘을 포함하는 재료를 스퍼터링하는 단계; 및
상기 타겟으로부터 상기 재료를 스퍼터링하면서, 프로세스 가스의 유동을 전달하는 단계 ― 상기 프로세스 가스는 산소 및 질소를 포함하고, 상기 프로세스 가스에서의 산소 대 질소의 비율이 조정됨으로써 의도된 리소그래피 노광 파장에서, 스퍼터링된 재료의 굴절률 및 흡광 계수와 포토-레지스트 층의 굴절률 및 흡광 계수가 상기 포토-레지스트 층의 단일 층만을 사용하여 상기 스퍼터링된 재료가 반복적으로 패터닝될 수 있게 할 정도로 유사하게 되고, 상기 포토-레지스트 층은 상기 스퍼터링된 재료의 표면 상에 배치되고, 상기 프로세스 가스는 아르곤, 헬륨, 네온, 크립톤, 제논, 질소, 형성 가스, 암모니아, 산소, 수소, 물, 그리고 탄소를 포함하는 가스로 구성된 그룹으로부터 선택된 가스를 포함함 ―
를 포함하는,
하드마스크를 형성하기 위한 방법. - 제 29 항에 있어서,
상기 프로세스 가스는 메탄(CH4), 일산화 탄소(CO), 또는 이산화 탄소(CO2)를 포함하는,
하드마스크를 형성하기 위한 방법.
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CN106169415A (zh) | 2016-11-30 |
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US9177796B2 (en) | 2015-11-03 |
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TWI606294B (zh) | 2017-11-21 |
TW201447475A (zh) | 2014-12-16 |
US20140327117A1 (en) | 2014-11-06 |
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