KR101860042B1 - 메트롤로지 타겟의 디자인을 위한 장치 및 방법 - Google Patents
메트롤로지 타겟의 디자인을 위한 장치 및 방법 Download PDFInfo
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- KR101860042B1 KR101860042B1 KR1020167021018A KR20167021018A KR101860042B1 KR 101860042 B1 KR101860042 B1 KR 101860042B1 KR 1020167021018 A KR1020167021018 A KR 1020167021018A KR 20167021018 A KR20167021018 A KR 20167021018A KR 101860042 B1 KR101860042 B1 KR 101860042B1
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Abstract
Description
도 1은 리소그래피 장치의 일 실시예를 개략적으로 도시하는 도면;
도 2는 리소그래피 셀 또는 클러스터(lithographic cell or cluster)의 일 실시예를 개략적으로 도시하는 도면;
도 3은 스캐터로미터의 일 실시예를 개략적으로 도시하는 도면;
도 4는 스캐터로미터의 또 다른 실시예를 개략적으로 도시하는 도면;
도 5는 일 형태의 다수 격자 타겟 및 기판 상의 측정 스폿의 윤곽(outline)을 개략적으로 도시하는 도면;
도 6a 및 도 6b는 이상적인 것으로부터의 타겟의 변동, 예를 들어 두 가지 타입의 공정-유도 비대칭(process-induced asymmetry)의 일 예시를 나타내는 오버레이 타겟의 한 주기의 모델 구조체를 개략적으로 도시하는 도면;
도 7은 제조 공정 시뮬레이션 모델의 기능적 모듈들을 나타내는 예시적인 블록도; 및
도 8은 메트롤로지 타겟 디자인을 위한 공정을 개략적으로 도시하는 도면이다.
Claims (15)
- 메트롤로지 타겟 디자인의 컴퓨터-구현 방법에 있어서,
메트롤로지 타겟의 각각의 디자인 파라미터들에 대한 복수의 값들 또는 범위를 제공하는 단계; 및
프로세서에 의해, 상기 메트롤로지 타겟의 디자인 파라미터에 대한 제약을 충족시키는 하나 이상의 디자인 파라미터들을 갖는 복수의 메트롤로지 타겟 디자인들을, 상기 디자인 파라미터들에 대한 상기 복수의 값들 또는 범위 내에서 샘플링함으로써 선택 및/또는 해결하는 단계를 포함하며,
상기 디자인 파라미터들에 대한 상기 복수의 값들 또는 범위 내에서 샘플링함으로써 선택하는 단계는, 디자인 파라미터에 샘플링 간격을 적용하는 단계를 포함하고, 샘플링 간격에 대한 성능 지수를 시뮬레이션하는 단계, 및 상기 샘플링 간격의 감소가 상기 성능 지수를 중대하게 변화시키지 않을 때까지 상기 샘플링 간격을 반복적으로 감소시키는 단계를 더 포함하는 컴퓨터-구현 방법. - 제 1 항에 있어서,
리소그래피 모델을 이용하여 상기 복수의 메트롤로지 타겟 디자인들을 시뮬레이션하는 단계를 더 포함하는 컴퓨터-구현 방법. - 제 1 항에 있어서,
상기 디자인 파라미터들 중 적어도 하나는 상기 메트롤로지 타겟의 지오메트리 치수(geometric dimension)를 포함하는 컴퓨터-구현 방법. - 제 1 항에 있어서,
상기 제약은 복수의 값들 또는 범위가 제공된 것들과 상이한 디자인 파라미터에 대한 것인 컴퓨터-구현 방법. - 제 1 항에 있어서,
상기 복수의 값들 또는 범위를 제공하는 단계는 사용자에 의해 상기 복수의 값들 또는 상기 범위의 선택을 포함하는 컴퓨터-구현 방법. - 제 1 항에 있어서,
상기 제약은 사용자에 의해 정의되는 컴퓨터-구현 방법. - 제 1 항에 있어서,
상기 제약은 선형 대수 표현(linear algebraic expression)을 포함하는 컴퓨터-구현 방법. - 제 1 항에 있어서,
상기 제약은 상기 메트롤로지 타겟의 2 개의 상이한 지오메트리 치수들 간의 관계를 포함하는 컴퓨터-구현 방법. - 제 1 항에 있어서,
상기 메트롤로지 타겟 디자인은 복수의 층들을 포함하고, 상기 제약은 한 층의 치수와 다른 층의 치수 간의 제약인 컴퓨터-구현 방법. - 제 1 항에 있어서,
상기 디자인 파라미터들은 피치, 임계 치수 및/또는 트렌치 폭을 포함하는 컴퓨터-구현 방법. - 제 1 항에 있어서,
상기 제약은 상기 타겟을 측정하는 데 사용되는 메트롤로지 시스템으로 인한 물리적 한계를 포함하는 컴퓨터-구현 방법. - 제 11 항에 있어서,
상기 물리적 한계는, 상기 메트롤로지 시스템에 사용되는 방사선의 파장, 상기 메트롤로지 시스템에 사용되는 방사선의 편광, 상기 메트롤로지 시스템의 개구수, 타겟 타입, 및/또는 공정 파라미터로부터 선택되는 하나 이상을 포함하는 컴퓨터-구현 방법. - 제 1 항에 있어서,
상기 복수의 메트롤로지 타겟 디자인들을, 상기 디자인 파라미터들에 대한 상기 복수의 값들 또는 범위 내에서 샘플링함으로써 선택 및/또는 해결하기 전에, 상기 디자인 파라미터들의 상기 복수의 값들 또는 범위에 상기 제약을 적용하는 단계를 더 포함하는 컴퓨터-구현 방법. - 제 1 항에 따른 방법을 수행하도록 컴퓨터에 의해 실행가능한 명령어들을 포함하는 컴퓨터 판독가능한 매체.
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US201361921907P | 2013-12-30 | 2013-12-30 | |
US61/921,907 | 2013-12-30 | ||
PCT/EP2014/076543 WO2015101459A1 (en) | 2013-12-30 | 2014-12-04 | Method and apparatus for design of a metrology target |
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KR20160103133A KR20160103133A (ko) | 2016-08-31 |
KR101860042B1 true KR101860042B1 (ko) | 2018-05-21 |
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KR1020167021018A Active KR101860042B1 (ko) | 2013-12-30 | 2014-12-04 | 메트롤로지 타겟의 디자인을 위한 장치 및 방법 |
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JP (1) | JP6291581B2 (ko) |
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