KR20130102504A - 저 유전상수 손상을 감소시키도록 노출된 저 유전상수 표면에 SiOCl-함유 층을 형성하는 방법 - Google Patents
저 유전상수 손상을 감소시키도록 노출된 저 유전상수 표면에 SiOCl-함유 층을 형성하는 방법 Download PDFInfo
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Abstract
Description
도 1a 내지 도 1c는 저 유전상수 층을 패터닝하는 종래의 방법을 개략적으로 보여주는 도면이다.
도 2a 내지 도 2e는 일 실시형태에 따라 노출된 저 유전상수 표면을 보호하면서 저 유전상수 층을 패터닝하는 방법을 개략적으로 보여주는 도면이다.
도 3은 일 실시형태에 따라 노출된 저 유전상수 표면을 보호하는 방법을 예시하는 흐름도이다.
도 4a 내지 도 4f는 다른 실시형태에 따라 노출된 저 유전상수 표면을 보호하면서 저 유전상수 층을 패터닝하는 방법을 개략적으로 보여주는 도면이다.
도 5는 일 실시형태에 따른 플라즈마 처리 시스템을 개략적으로 보여주는 도면이다.
도 6은 다른 실시형태에 따른 플라즈마 처리 시스템을 개략적으로 보여주는 도면이다.
도 7은 다른 실시형태에 따른 플라즈마 처리 시스템을 개략적으로 보여주는 도면이다.
도 8은 다른 실시형태에 따른 플라즈마 처리 시스템을 개략적으로 보여주는 도면이다.
도 9는 다른 실시형태에 따른 플라즈마 처리 시스템을 개략적으로 보여주는 도면이다.
도 10은 다른 실시형태에 따른 플라즈마 처리 시스템을 개략적으로 보여주는 도면이다.
도 11은 다른 실시형태에 따른 플라즈마 처리 시스템을 개략적으로 보여주는 도면이다.
Claims (20)
- 노출된 저 유전상수 표면을 보호하는 방법으로서,
마스크 층과 저 유전상수 층이 형성된 기판으로서, 리소그래피 공정을 사용하여 상기 마스크 층에 형성된 패턴이 에칭 공정을 이용하여 상기 저 유전상수 층에 전사되어, 저 유전상수 층에 구조적 특징부가 형성되는 것인 기판을 수용하는 단계;
상기 마스크 층과 상기 저 유전상수 층의 노출된 표면에 SiOCl-함유 층을 형성하는 단계;
상기 구조적 특징부의 측벽면 상의 상기 SiOCl-함유 층의 잔여부를 유지시키면서, 상기 마스크 층의 상면 및 상기 저 유전상수 층의 상기 구조적 특징부의 바닥면으로부터 상기 SiOCl-함유 층을 이방성 제거하는 단계;
상기 마스크 층의 적어도 일부분을 제거하도록 애싱 공정을 수행하는 단계;
상기 애싱 공정을 수행한 이후에, 상기 구조적 특징부의 상기 측벽면으로부터 상기 SiOCl-함유 층의 상기 잔여부를 선택적으로 제거하는 단계
를 포함하는 노출된 저 유전상수 표면 보호 방법. - 제1항에 있어서, 상기 SiOCl-함유 층을 형성하는 단계는, Si, Cl 및 O를 함유하는 환경에서 증착 공정을 수행하는 것을 포함하는 것인 노출된 저 유전상수 표면 보호 방법.
- 제1항에 있어서, 상기 SiOCl-함유 층을 형성하는 단계는, 초기 성분으로서 SiCl4 및 O2를 함유하는 프로세스 조성물을 사용하여 플라즈마를 발생시키는 것을 포함하는 플라즈마 지원 증착 공정을 수행하는 것을 포함하는 것인 노출된 저 유전상수 표면 보호 방법.
- 제3항에 있어서, 상기 플라즈마 지원 증착 공정에는, 상기 기판이 놓이는 기판 홀더에 RF(radio frequency) 바이어스를 인가하는 것이 제외되어 있는 것인 노출된 저 유전상수 표면 보호 방법.
- 제3항에 있어서, 상기 기판의 온도가 섭씨 0도 내지 100도의 범위인 것인 노출된 저 유전상수 표면 보호 방법.
- 제3항에 있어서, 상기 SiOCl-함유 층을 형성하는 단계는, 상기 SiOCl-함유 층의 상기 애싱 공정에 대한 에칭 저항성을 증가시키도록, 상기 플라즈마 지원 증착 공정에서의 적어도 하나의 공정 파라미터를 조정하는 것을 포함하는 것인 노출된 저 유전상수 표면 보호 방법.
- 제1항에 있어서, 상기 SiOCl-함유 층을 형성하는 단계는, SiCl4 및 H2O에 상기 기판을 노출시키고 상기 기판을 가열하는 것을 포함하는 것인 노출된 저 유전상수 표면 보호 방법.
- 제1항에 있어서, 상기 SiOCl-함유 층을 이방성 제거하는 단계는, 초기 성분으로서 CxFy-함유 가스 및 희가스를 함유하는 프로세스 조성물을 사용하여 플라즈마를 발생시키는 것을 포함하는 이방성 플라즈마 에칭 공정을 이용하는 것을 포함하는 것인 노출된 저 유전상수 표면 보호 방법.
- 제8항에 있어서, 상기 이방성 플라즈마 에칭 공정에는, 상기 기판이 놓이는 기판 홀더에 RF(radio frequency) 바이어스를 인가하는 것이 포함되어 있는 것인 노출된 저 유전상수 표면 보호 방법.
- 제1항에 있어서, 상기 애싱 공정은 O, N, H, 또는 이들 중 2 이상의 임의의 조합을 함유하는 프로세스 조성물을 사용하여 플라즈마를 발생시키는 것을 포함하는 것인 노출된 저 유전상수 표면 보호 방법.
- 제1항에 있어서, 상기 구조적 특징부의 상기 측벽면으로부터 상기 SiOCl-함유 층의 상기 잔여부를 선택적으로 제거하는 단계는, 습식 세정 공정을 수행하는 것을 포함하는 것인 노출된 저 유전상수 표면 보호 방법.
- 제11항에 있어서, 상기 구조적 특징부의 상기 측벽면으로부터 상기 SiOCl-함유 층의 상기 잔여부를 선택적으로 제거하는 단계는, 묽은 HF 수용액에 상기 SiOCl-함유 층의 상기 잔여부를 침지하는 것을 포함하는 것인 노출된 저 유전상수 표면 보호 방법.
- 제1항에 있어서, 상기 구조적 특징부는 비아, 트렌치, 또는 트렌치-비아 구조를 포함하는 것인 노출된 저 유전상수 표면 보호 방법.
- 제13항에 있어서, 상기 트렌치-비아 구조는, 트렌치-퍼스트 금속 하드 마스크 방안 또는 비아-퍼스트 트렌치-라스트 방안을 이용하여 형성되는 것인 노출된 저 유전상수 표면 보호 방법.
- 제1항에 있어서, 상기 마스크 층은 방사선 민감 재료의 층을 포함하는 것인 노출된 저 유전상수 표면 보호 방법.
- 제15항에 있어서, 상기 기판은 반사 방지 코팅(ARC) 층을 더 포함하고, 선택적으로 상기 방사선 민감 재료의 층과 상기 저 유전상수 층의 사이에 배치되는 유기 평탄화 층(OPL)을 더 포함하는 것인 노출된 저 유전상수 표면 보호 방법.
- 제1항에 있어서, 상기 저 유전상수 층이 갖는 유전 상수는 4 미만의 값인 것인 노출된 저 유전상수 표면 보호 방법.
- 제1항에 있어서, 상기 저 유전상수 층이 갖는 유전 상수는 2.5 미만의 값인 것인 노출된 저 유전상수 표면 보호 방법.
- 제1항에 있어서, 상기 저 유전상수 층은 다공성 저 유전상수 층 또는 비다공성 저 유전상수 층을 포함하는 것인 노출된 저 유전상수 표면 보호 방법.
- 제1항에 있어서, 상기 저 유전상수 층은 SiCOH-함유 층을 포함하는 것인 노출된 저 유전상수 표면 보호 방법.
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