KR102689803B1 - 통합된 단부-대-단부 완전 자가-정렬된 인터커넥트 프로세스를 위한 플랫폼 및 동작 방법 - Google Patents
통합된 단부-대-단부 완전 자가-정렬된 인터커넥트 프로세스를 위한 플랫폼 및 동작 방법 Download PDFInfo
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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Abstract
Description
도 1a 내지 도 1m은 완전 자가-정렬된 비아 형성 방법의 일 실시형태를 도시하는 개략적인 횡단면도이다.
도 2는 완전 자가-정렬된 비아 형성을 위한 통합된 프로세스 흐름의 일 실시형태를 도시하는 흐름도이다.
도 3은 완전 자가-정렬된 비아 형성 방법을 실시하기 위한 공통 제조 플랫폼의 일 실시형태를 도시하는 개략도이다.
도 4a 및 도 4b는 통상적으로 충진된 특징부를 완전 자가-정렬된 비아 특징부와 비교하는 개략적인 횡단면도이다.
도 5a 내지 도 5k은 완전 자가-정렬된 비아 형성 방법의 일 실시형태를 도시하는 개략적인 횡단면도이다.
도 6은 완전 자가-정렬된 비아 형성을 위한 통합된 프로세스 흐름의 일 실시형태를 도시하는 흐름도이다.
Claims (39)
- 반도체 공작물 상에서 자가-정렬된 비아를 제조하기 위한 방법으로서,
하나 이상의 필름-형성 모듈, 하나 이상의 에칭 모듈, 및 하나 이상의 전달 모듈을 포함하는 복수의 프로세싱 모듈을 호스팅하는 공통 제조 플랫폼 상에서 실행되는, 통합된 프로세싱 단계들의 시퀀스를 이용하는 단계를 포함하고, 상기 통합된 프로세싱 단계들의 시퀀스는,
상기 공작물을 상기 공통 제조 플랫폼 내로 수용하는 단계로서, 상기 공작물은 유전체 층 내에서 금속 특징부의 패턴을 가지고, 상기 금속 특징부의 노출된 표면 및 상기 유전체 층의 노출된 표면은 상부 평면형 표면을 함께 형성하는, 단계;
상기 하나 이상의 필름-형성 모듈 중 하나를 이용하여, 금속 캡을, 상기 노출된 유전체 재료에 대해서 상대적으로, 상기 금속 특징부의 노출된 표면 상에 선택적으로 침착시키는 단계로서, 상기 금속 캡과 상기 유전체 재료 사이의 선택비는, 적어도 부분적으로, 상기 유전체 재료 상에서보다 큰 상기 금속 특징부 상에서의 금속 캡 침착률을 기초로 하는, 단계;
상기 하나 이상의 필름-형성 모듈 중 하나를 이용하여, 장벽 층을, 상기 노출된 유전체 재료에 대해서 상대적으로, 상기 금속 캡 상에 선택적으로 형성하는 단계로서, 상기 금속 캡과 상기 유전체 재료 사이의 선택비는, 적어도 부분적으로, 상기 유전체 재료 상에서보다 큰 상기 금속 캡 상에서의 장벽 층 침착률을 기초로 하는, 단계;
함몰 패턴을 제1 유전체 재료 내에 형성하기 위해서, 제1 유전체 재료를, 상기 하나 이상의 필름-형성 모듈 중 하나를 이용하여 상기 유전체 층의 노출된 표면 상에 선택적으로 침착시키는 단계로서, 상기 선택적인 침착은, 적어도 부분적으로, 상기 장벽 층 상에서보다 상기 노출된 표면 상에서 더 큰 제1 유전체 재료의 침착률을 기초로 하고, 상기 함몰 패턴은 제1 유전체 재료의 일부를 포함하는 측벽을 포함하는, 단계;
상기 하나 이상의 에칭 모듈 중 하나를 이용하여 상기 함몰 패턴의 하단 표면에서 상기 금속 캡을 노출시키도록, 상기 공작물을 처리하는 단계; 및
상기 하나 이상의 필름-형성 모듈 중 하나를 이용하여, 에칭 정지 층을 상기 함몰 패턴 위에 침착시키는 단계를 포함하고,
상기 통합된 프로세싱 단계들의 시퀀스는 상기 공통 제조 플랫폼 내의 제어된 환경에서 그리고 상기 제어된 환경을 벗어나지 않고 실행되며, 상기 하나 이상의 전달 모듈을 이용하여, 상기 공작물을 상기 제어된 환경에서 유지하면서, 상기 공작물을 상기 복수의 프로세싱 모듈들 사이에서 전달하는, 방법. - 제1항에 있어서,
상기 장벽 층을 침착시키는 것은 상기 금속 특징부의 패턴 위에서 상기 금속 캡을 둘러싸는, 방법. - 제1항에 있어서,
상기 금속 캡을 선택적으로 침착시키는 단계는 적어도 10:1의 상기 유전체 층에 대한 상기 금속 특징부의 선택비를 포함하는, 방법. - 제1항에 있어서,
상기 제어된 환경이 진공, 불활성 가스, 또는 이들의 조합을 포함하는, 방법. - 제1항에 있어서,
상기 금속 캡은 루테늄을 포함하고, 상기 금속 특징부는 구리를 포함하는, 방법. - 제1항에 있어서,
상기 장벽 층은 자가-조립 단일층을 포함하는, 방법. - 제1항에 있어서,
상기 선택적인 침착은, 10 nm 이하의 상기 제1 유전체 재료를 상기 공작물 위에 도포하는 둘 이상의 침착 단계를 포함하는, 방법. - 제1항에 있어서,
상기 통합된 프로세싱 단계들의 시퀀스는, 상기 유전체 재료의 표면 말단을 변경하기 위해서 상기 금속 캡을 침착시키기 전에 상기 공작물을 전-처리하는 단계를 더 포함하고, 상기 전-처리하는 단계는 상기 공통 제조 플랫폼 상의 하나 이상의 전-처리 모듈에서 이루어지는, 방법. - 제1항에 있어서,
상기 통합된 프로세싱 단계들의 시퀀스는, 상기 금속 캡 침착 단계 중에, 하나 이상의 에칭 챔버를 이용하여, 임의의 금속을 상기 유전체 재료로부터 제거하는 단계를 더 포함하는, 방법. - 제1항에 있어서,
상기 통합된 프로세싱 단계들의 시퀀스는, 상기 제1 유전체 재료 침착 단계 중에, 상기 제1 유전체 재료를 상기 장벽 층으로부터 제거하는 단계를 더 포함하는, 방법. - 제1항에 있어서,
상기 통합된 프로세싱 단계들의 시퀀스는, 상기 제1 유전체 재료 침착 단계 중에, 상기 제1 유전체 재료 및 상기 장벽 층 중 적어도 하나를 상기 금속 캡으로부터 제거하는 단계를 더 포함하는, 방법. - 제11항에 있어서,
상기 통합된 프로세싱 단계들의 시퀀스는, 상기 하나 이상의 필름-형성 모듈 중 하나를 이용하여, 대체 장벽 층을, 상기 노출된 유전체 재료에 대해서 상대적으로, 상기 금속 캡 상에 선택적으로 형성하는 단계를 더 포함하고, 상기 금속 캡과 상기 유전체 재료 사이의 선택비는, 적어도 부분적으로, 상기 유전체 재료 상에서보다 큰 상기 금속 캡 상에서의 대체 장벽 층 침착률을 기초로 하는, 방법. - 제1항에 있어서,
상기 하나 이상의 필름-형성 모듈 중 하나를 이용하여, 중간층 유전체 필름을 상기 함몰 패턴 위 및 상기 함몰 패턴 내 중 적어도 하나에 형성하기 위해서 제2 유전체 재료를 상기 에칭 정지 층 상에 침착시키는 단계를 더 포함하는, 방법. - 제1항에 있어서,
상기 유전체 층은 산화물을 포함하고, 상기 제1 유전체 재료는 상기 유전체 층의 산화물과 상이한 산화물인, 방법. - 제1항에 있어서,
상기 금속 캡은 루테늄, 코발트, 텅스텐, 또는 몰리브덴을 포함하는, 방법. - 반도체 공작물 상에서 자가-정렬된 비아를 제조하기 위한 방법으로서,
하나 이상의 필름-형성 모듈, 하나 이상의 에칭 모듈, 및 하나 이상의 전달 모듈을 포함하는 복수의 프로세싱 모듈을 호스팅하는 공통 제조 플랫폼 상에서 실행되는, 통합된 프로세싱 단계들의 시퀀스를 이용하는 단계를 포함하고, 상기 통합된 프로세싱 단계들의 시퀀스는,
상기 공작물을 상기 공통 제조 플랫폼 내로 수용하는 단계로서, 상기 공작물은 유전체 층 내에서 금속 특징부의 패턴을 가지고, 상기 금속 특징부의 노출된 표면 및 상기 유전체 층의 노출된 표면은 상부 평면형 표면을 함께 형성하는, 단계;
상기 하나 이상의 필름-형성 모듈 중 하나를 이용하여, 금속 캡을, 상기 노출된 유전체 재료에 대해서 상대적으로, 상기 금속 특징부의 노출된 표면 상에 선택적으로 침착시키는 단계;
제1 유전체 재료의 함몰된 패턴을 상기 유전체 재료에 대해서 상대적으로 상기 금속 특징부 주위에 선택적으로 형성하는 단계로서, 상기 금속 캡은 상기 함몰된 패턴의 하단 표면을 형성하고, 상기 금속 캡은 함몰된 패턴의 상단부로부터 노출되는, 단계; 및
상기 하나 이상의 필름-형성 모듈 중 하나를 이용하여, 에칭 정지 층을 상기 함몰 패턴 위에 침착시키는 단계를 포함하고,
상기 통합된 프로세싱 단계들의 시퀀스는 상기 공통 제조 플랫폼 내의 제어된 환경에서 그리고 상기 제어된 환경을 벗어나지 않고 실행되며, 상기 하나 이상의 전달 모듈을 이용하여, 상기 공작물을 상기 제어된 환경에서 유지하면서, 상기 공작물을 상기 복수의 프로세싱 모듈들 사이에서 전달하는, 방법. - 반도체 공작물 상에서 자가-정렬된 비아를 제조하기 위한 방법으로서,
하나 이상의 필름-형성 모듈, 하나 이상의 에칭 모듈, 및 하나 이상의 전달 모듈을 포함하는 복수의 프로세싱 모듈을 호스팅하는 공통 제조 플랫폼 상에서 실행되는, 통합된 프로세싱 단계들의 시퀀스를 이용하는 단계를 포함하고, 상기 통합된 프로세싱 단계들의 시퀀스는,
상기 공작물을 상기 공통 제조 플랫폼 내로 수용하는 단계로서, 상기 공작물은 유전체 층 내에서 금속 특징부의 패턴을 가지고, 상기 금속 특징부의 노출된 표면 및 상기 유전체 층의 노출된 표면은 상부 평면형 표면을 함께 형성하는, 단계;
상기 하나 이상의 필름-형성 모듈 중 하나를 이용하여, 금속 캡을, 상기 노출된 유전체 재료에 대해서 상대적으로, 상기 금속 특징부의 노출된 표면 상에 선택적으로 침착시키는 단계;
제1 유전체 재료의 함몰된 패턴을 상기 유전체 재료에 대해서 상대적으로 상기 금속 특징부 주위에 선택적으로 형성하는 단계로서, 상기 금속 캡은 상기 함몰된 패턴의 하단 표면을 형성하고, 상기 금속 캡은 함몰된 패턴의 상단부로부터 노출되는, 단계; 및
상기 금속 캡 침착 및 함몰 패턴 형성 중 적어도 하나와 관련된 상기 공작물 상의 불일치를 검출하기 위해서 상기 통합된 시퀀스의 하나 이상의 지점에서 상기 공작물을 검사하는 단계를 포함하고,
상기 통합된 프로세싱 단계들의 시퀀스는 상기 공통 제조 플랫폼 내의 제어된 환경에서 그리고 상기 제어된 환경을 벗어나지 않고 실행되며, 상기 하나 이상의 전달 모듈을 이용하여, 상기 공작물을 상기 제어된 환경에서 유지하면서, 상기 공작물을 상기 복수의 프로세싱 모듈들 사이에서 전달하는, 방법. - 제17항에 있어서,
상기 함몰 패턴을 선택적으로 형성하는 단계는,
상기 하나 이상의 필름-형성 모듈 중 하나를 이용하여, 자가-조립된 단일층을 상기 금속 캡 상에 침착시키는 단계;
상기 제1 유전체 재료 내에 함몰부를 형성하기 위해서, 상기 하나 이상의 필름-형성 모듈 중 하나를 이용하여 상기 제1 유전체 재료를 상기 유전체 층의 노출된 표면 상에 선택적으로 침착시키는 단계; 및
상기 금속 캡을 상기 함몰 패턴의 하단 표면에서 노출시키기 위해서, 상기 하나 이상의 에칭 모듈 중 하나를 이용하여 상기 자가-조립된 단일층을 제거하기 위해 상기 공작물을 에칭하는 단계를 포함하는, 방법. - 제18항에 있어서,
상기 하나 이상의 필름-형성 모듈 중 하나를 이용하여, 에칭 정지 층을 상기 함몰 패턴 위에 침착시키는 단계; 및
상기 하나 이상의 필름-형성 모듈 중 하나를 이용하여, 중간층 유전체를 상기 함몰 패턴 위에 형성하기 위해서 제2 유전체 재료를 상기 에칭 정지 층 상에 침착시키는 단계를 더 포함하는, 방법. - 제18항에 있어서,
상기 공작물 상의 불일치를 검출하기 위해서 상기 통합된 시퀀스의 하나 이상의 지점에서 상기 공작물을 검사하는 단계는, 상기 금속 캡이 미리-결정된 단일층 커버리지 문턱값 초과로 상기 자가-조립된 단일층에 의해서 덮인 것 및 상기 유전체 층의 노출된 표면 상의 금속 핵이 미리 결정된 금속 핵 문턱값을 초과하는 것 중 적어도 하나를 검증하기 위해서, 상기 금속 캡과 관련된 측정 데이터 및 상기 유전체 층의 노출된 표면의 측정 데이터 중 적어도 하나를 획득하는 단계를 포함하는, 방법. - 제20항에 있어서,
상기 불일치가 상기 공작물 상에 존재한다는 것을 상기 측정 데이터가 나타낼 때 상기 불일치를 경감하기 위한 치유 작업을 실시하는 단계를 더 포함하고, 상기 치유 작업은, 상기 미리-결정된 단일층 커버리지 문턱값이 초과될 때 상기 자가-조립된 단일층을 제거하는 것, 및 상기 미리 결정된 금속 핵 문턱값이 초과될 때 금속 핵을 상기 유전체 층으로부터 제거하는 것 중 적어도 하나를 포함하는, 방법. - 제18항에 있어서,
상기 공작물 상의 불일치를 검출하기 위해서 상기 통합된 시퀀스의 하나 이상의 지점에서 상기 공작물을 검사하는 단계는,
상기 자가-조립된 단일층이 상기 금속 캡으로부터 제거되었는지를 검증하기 위해서 상기 금속 캡의 속성과 관련된 측정 데이터를 획득하는 단계; 또는
상기 제1 유전체 재료가 상기 유전체 층의 노출된 표면을 완전히 덮는 것, 및 상기 금속 캡의 노출된 표면 상에 제1 유전체 층이 존재하지 않는 것 중 적어도 하나를 검증하기 위해서 상기 제1 유전체 재료의 속성과 관련된 측정 데이터를 획득하는 단계를 포함하는, 방법. - 제22항에 있어서,
상기 불일치가 상기 공작물 상에 존재한다는 것을 상기 측정 데이터가 나타낼 때 상기 불일치를 경감하기 위한 치유 작업을 실시하는 단계를 더 포함하고, 상기 치유 작업은, 적어도 부분적으로, 상기 금속 캡의 속성에 관련된 측정 데이터를 기초로 자가-조립된 단일 층을 상기 금속 캡으로부터 제거하는 것, 및 적어도 부분적으로, 상기 제1 유전체 재료의 속성과 관련된 측정 데이터를 기초로 상기 제1 유전체 층을 금속 캡의 노출된 표면으로부터 제거하는 것 중 적어도 하나를 포함하는, 방법. - 제17항에 있어서,
상기 금속 캡은 루테늄, 코발트, 텅스텐, 또는 몰리브덴을 포함하는, 방법. - 삭제
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