KR20190047005A - 구조체의 속성 결정 방법, 검사 장치 및 디바이스 제조 방법 - Google Patents
구조체의 속성 결정 방법, 검사 장치 및 디바이스 제조 방법 Download PDFInfo
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Abstract
Description
도 1 은 리소그래피 장치를 도시한다;
도 2 는 검사 장치가 사용될 수 있는 리소그래피 셀 또는 클러스터를 도시한다;
도 3 은 실시예가 적용될 수 있는 광학 시스템의 일 예로서, 각도-분해 산란측정을 수행하도록 구성되는 검사 장치의 일 예를 도시한다;
도 4 는 실시예가 적용될 수 있는 광학 시스템의 다른 예로서, 각도-분해 산란측정을 수행하도록 구성되는 검사 장치의 일 예를 도시하는데, 광학 시스템은 고체 침지 렌즈(SIL)를 포함한다;
도 5 는 도 5 의 검사 장치에 있는 이미지 센서에 의해 캡쳐되는 퓨필 이미지의 흑백의 예를 도시한다;
도 6 은 위치설정 오차 및 좀 더 일반적으로는 상태 오차의 일 예인, 대물 렌즈와 SIL 사이의 초점 오차 때문에 생기는, 도 5 의 퓨필 이미지에 도입되는 왜곡 맵이다;
도 7 은 퓨필 이미지를 캡쳐하는 데에 있는 하나 이상의 동적 상태 오차를 일 실시예에 따라 정정하면서 구조체의 속성을 측정하는 방법의 흐름도이다; 그리고
도 8 은 도 7 의 방법으로 수행된 측정을 사용하는 계측 방법 및/또는 리소그래피 제조 프로세스의 성능을 제어하는 방법을 예시하는 흐름도이다.
Claims (15)
- 구조체의 속성을 결정하는 방법으로서,
광학 시스템이 상기 구조체와의 상호작용에 의하여 변경된 방사선을 수집하게 하는 단계;
상기 광학 시스템의 캡쳐 평면에서 수집된 방사선의 분포를 관측하게 하는 단계 - 상기 광학 시스템과 연관된 상태 오차는 관측들마다 가변적임 -; 및
방사선의 적어도 하나의 관측된 분포에 기초하여 상기 구조체의 속성을 계산하는 단계를 포함하고,
상기 계산하는 것은, 상기 관측에 특유한 상태 오차에 기인한 상기 분포의 편차에 대한 정정을 포함하는, 구조체 속성 결정 방법. - 제 1 항에 있어서,
상기 정정은 상기 관측에 특유한 상태 오차에 따라 스케일링된 단위 상태 오차에 대해 규정된 단위 정정에 기초하는, 구조체 속성 결정 방법. - 제 2 항에 있어서,
상기 단위 정정은 상기 광학 시스템의 시뮬레이션에 기초한 계산으로부터 유도되는, 구조체 속성 결정 방법. - 제 2 항에 있어서,
상기 정정은 상기 상태 오차에 비례하여 선형으로 스케일링되는, 구조체 속성 결정 방법. - 제 1 항에 있어서,
상기 광학 시스템의 상태 오차는 상기 관측의 기간 내에서 변하고,
다수의 서브-기간에 기록된 다수의 상태 오차 값이 상기 계산에 사용되는, 구조체 속성 결정 방법. - 제 1 항에 있어서,
상기 편차는 상기 광학 시스템의 캡쳐 평면에서의 상기 방사선의 분포의 면내 왜곡을 포함하고,
상기 정정은 상기 면내 왜곡에 대한 정정을 포함하는, 구조체 속성 결정 방법. - 제 1 항에 있어서,
상기 편차는 상기 캡쳐 평면에 걸친 위상의 편차를 포함하고,
상기 정정은 상기 위상의 편차의 정정을 포함하는, 구조체 속성 결정 방법. - 제 1 항에 있어서,
상기 캡쳐 평면은 상기 광학 시스템의 후초점면이고, 상기 방사선의 분포는 산란 스펙트럼을 포함하는, 구조체 속성 결정 방법. - 제 1 항에 있어서,
상기 속성의 계산은 관측된 분포와 시뮬레이션된 분포 사이의 비교에 기초하는, 구조체 속성 결정 방법. - 제 1 항에 있어서,
상기 광학 시스템은 광학 요소를 타겟 구조체로부터 상기 방사선의 파장보다 짧은 거리 내에 홀딩하도록 동작가능한 마운트를 포함하는, 구조체 속성 결정 방법. - 제 10 항에 있어서,
상기 광학 요소는, 상기 광학 시스템의 실효 개구수 NA를 1 보다 커지게 증가시키도록, 대물 렌즈의 초점에서 동작가능한 고체 침지 렌즈인, 구조체 속성 결정 방법. - 제 11 항에 있어서,
상기 상태 오차는 상기 대물 렌즈의 초점에 상대적으로 상기 광학 요소를 위치설정 하는 데에 있어서의 오차에 관련되는, 구조체 속성 결정 방법. - 제 1 항에 있어서,
상기 상태 오차는 초점 오차인, 구조체 속성 결정 방법. - 구조체의 속성을 결정하도록 구성되는 장치로서,
광학 시스템의 캡쳐 평면에서 방사선의 분포의 적어도 하나의 관측에 기초하여 상기 구조체의 속성을 계산하도록 구성되는 프로세서를 포함하고,
상기 광학 시스템은 상기 구조체와의 상호작용에 의해 변경된 방사선을 수집한 것이며,
상기 광학 시스템과 연관된 상태 오차는 관측들마다 가변적이고,
상기 프로세서는 상기 관측에 특유한 상태 오차에 기인한 분포의 편차에 대한 정정을 적용하도록 구성되는, 구조체 속성 결정 장치. - 컴퓨터 프로그램 제품으로서,
처리 시스템이 제 1 항의 방법을 수행하게 하기 위한 머신-판독가능 명령을 포함하는, 컴퓨터 프로그램 제품.
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FR2904690B1 (fr) | 2006-08-02 | 2009-04-03 | Commissariat Energie Atomique | Dispositif de caracterisation d'objets uniques |
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NL1036459A1 (nl) * | 2008-02-13 | 2009-08-14 | Asml Netherlands Bv | Method and apparatus for angular-resolved spectroscopic lithography characterization. |
NL2004094A (en) | 2009-02-11 | 2010-08-12 | Asml Netherlands Bv | Inspection apparatus, lithographic apparatus, lithographic processing cell and inspection method. |
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JP2010230356A (ja) * | 2009-03-26 | 2010-10-14 | Nikon Corp | 表面検査装置及び表面検査方法 |
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Publication number | Publication date |
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CN109690412B (zh) | 2021-11-19 |
JP6908693B2 (ja) | 2021-07-28 |
US10712673B2 (en) | 2020-07-14 |
TWI689790B (zh) | 2020-04-01 |
IL264903B (en) | 2022-09-01 |
KR102323045B1 (ko) | 2021-11-08 |
WO2018046272A1 (en) | 2018-03-15 |
US20190361360A1 (en) | 2019-11-28 |
JP2019529988A (ja) | 2019-10-17 |
IL264903A (ko) | 2019-04-30 |
TW201812480A (zh) | 2018-04-01 |
CN109690412A (zh) | 2019-04-26 |
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