KR20190090861A - 계측 장치로부터의 조명 특성을 모니터링하기 위한 방법 - Google Patents
계측 장치로부터의 조명 특성을 모니터링하기 위한 방법 Download PDFInfo
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Abstract
Description
도 1은 리소그래피 장치를 나타낸다.
도 2는 본 발명에 따른 검사 장치가 사용될 수 있는 리소그래피 셀 또는 클러스터를 나타낸다.
도 3은 본 발명에 따른 초점 모니터링 구성이 적용될 수 있는 광학 시스템의 예로서, 각도-분해 산란 측정을 수행하도록 구성되는 공지된 검사 장치를 나타낸다.
도 4는 공지된 산란계의 예에서 조명 스폿과 타겟 격자 사이의 관계를 나타낸다.
도 5는 본 발명의 실시예에 따라 측정되는 타겟 상의 위치들의 개략도이다.
도 6은 타겟 상의 상이한 초점 설정 및 상이한 위치에서 획득되는 퓨필 이미지에서 비대칭을 도시한다.
도 7은 타겟 상의 상이한 위치들에 대하여 계측 장치의 초점 설정과 퓨필 이미지의 비대칭 사이의 관계를 도시하는 그래프이다.
도 8은 본 발명의 대안적인 실시예에 따라 퓨필이 측정되는 타겟 상의 다른 위치를 도시하는 다이어그램이다.
Claims (16)
- 계측 장치로부터의 조명 특성을 모니터링하기 위한 방법으로서,
계측 장치의 상이한 초점 설정에서 퓨필 이미지를 획득하기 위해 상기 계측 장치를 사용하는 단계; 및
각각의 획득된 퓨필 이미지에 대한 비대칭 값을 계산하는 단계;를 포함하되,
각각의 퓨필 이미지는 기판의 타겟의 적어도 하나의 가장자리 상에서 획득되는 조명 특성을 모니터링하기 위한 방법. - 제1 항에서,
최적의 초점을 가지는 초점 설정을 결정하기 위해 0의 비대칭 값에 대응되는 초점 설정을 계산하는 단계를 포함하는 조명 특성을 모니터링하기 위한 방법. - 제2 항에서,
상기 0의 비대칭 값에 대응되는 초점 설정을 계산하는 단계는 계산된 비대칭 값들 사이에서 보간하는 단계를 포함하는 조명 특성을 모니터링하기 위한 방법. - 제1 항 내지 제3 항 중 어느 한 항에서,
상기 비대칭 값을 계산하는 단계는, 상기 퓨필 이미지의 한 반부에서 픽셀의 세기 값을 합산하는 단계, 및 상기 퓨필 이미지의 나머지 반부에서 픽셀의 세기 값을 차감하는 단계를 포함하는 조명 특성을 모니터링하기 위한 방법. - 제1항 내지 제4항 중 어느 한 항에서,
퓨필 이미지는 각각의 초점 설정에 대하여 상기 타겟의 적어도 2개의 가장자리 상에서 획득되는 조명 특성을 모니터링하기 위한 방법. - 제1항 내지 제5항 중 어느 한 항에서,
상기 퓨필 이미지는 상기 타겟의 가장자리가 연장되는 방향에 매칭되는 편광 방향을 가지는 광을 사용하여 획득되는 조명 특성을 모니터링하기 위한 방법. - 제1항 내지 제6항 중 어느 한 항에서,
각각의 퓨필 이미지는 최대 20 ㎛의 직경을 가지는 조명 스폿으로 상기 타겟을 조명함으로써 형성되는 조명 특성을 모니터링하기 위한 방법. - 제1항 내지 제7항 중 어느 한 항에서,
상기 타겟은 최대 20 ㎛의 직경을 가지는 조명 특성을 모니터링하기 위한 방법. - 제1항 내지 제8항 중 어느 한 항에서,
상기 타겟은 상기 기판의 스크라이브-레인에 위치하는 조명 특성을 모니터링하기 위한 방법. - 제1항 내지 제9항 중 어느 한 항에서,
결정된 초점 설정은 상기 타겟에 인접한 다이 영역에 걸쳐 기판을 검사하기 위해 사용되는 조명 특성을 모니터링하기 위한 방법. - 제1항 내지 제10항 중 어느 한 항에서,
상기 기판의 복수의 다이 영역의 각각에 대하여, 최상의 초점을 가지는 초점 설정을 결정하는데 상기 다이 영역에 인접한 타겟이 사용되는 조명 특성을 모니터링하기 위한 방법. - 제1항 내지 제11항 중 어느 한 항에서,
상기 타겟으로부터 이격되어 있는 기판의 다이 영역에 대하여 최상의 초점을 가지는 초점 설정을 추정하기 위하여, 결정된 초점 설정에 대해 조정이 이루어지는 조명 특성을 모니터링하기 위한 방법. - 리소그래피 프로세스의 파라미터를 측정하기 위한 계측 장치로서, 제1 항 내지 제12 항 중 어느 한 항의 방법을 수행하도록 작동할 수 있는 계측 장치.
- 프로세서로 하여금 제1 항 내지 제12 항 중 어느 한 항의 방법을 수행하게 하기 위한 기계 판독가능한 명령을 포함하는 비일시적 컴퓨터 프로그램 제품.
- 기판 상의 타겟 상에 방사선 빔을 제공하고, 상기 타겟에 의해 회절된 방사선을 검출하여 패터닝 프로세스의 파라미터를 결정하도록 구성되는 검사 장치; 및
제14 항의 비일시적 컴퓨터 프로그램 제품;을 포함하는 시스템. - 제15 항에서,
방사선 빔을 변조하기 위한 패터닝 디바이스를 홀딩하도록 구성되는 지지 구조체, 및 상기 변조된 방사선 빔을 방사선 감응 기판 상으로 투영하도록 구성되는 투영 시스템을 포함하는 리소그래피 장치를 더 포함하는 시스템.
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EP16204662.7 | 2016-12-16 | ||
EP16204662.7A EP3336606A1 (en) | 2016-12-16 | 2016-12-16 | Method for monitoring a characteristic of illumination from a metrology apparatus |
PCT/EP2017/080476 WO2018108499A1 (en) | 2016-12-16 | 2017-11-27 | Method for monitoring a characteristic of illumination from a metrology apparatus |
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KR102279030B1 KR102279030B1 (ko) | 2021-07-19 |
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EP (1) | EP3336606A1 (ko) |
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CN (1) | CN110088683B (ko) |
IL (1) | IL267310B2 (ko) |
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EP3399371A1 (en) * | 2017-05-05 | 2018-11-07 | ASML Netherlands B.V. | Method of measuring a parameter of interest, device manufacturing method, metrology apparatus, and lithographic system |
EP3521929A1 (en) | 2018-02-02 | 2019-08-07 | ASML Netherlands B.V. | Method of determining an optimal focus height for a metrology apparatus |
US12025925B2 (en) | 2019-11-01 | 2024-07-02 | Asml Netherlands B.V. | Metrology method and lithographic apparatuses |
WO2024127383A1 (en) * | 2022-12-14 | 2024-06-20 | Nova Ltd. | Image-based autofocus for metrology |
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US20150145151A1 (en) * | 2012-07-05 | 2015-05-28 | Asml Netherlands B.V. | Metrology Method and Apparatus, Lithographic System, Device Manufacturing Method and Substrate |
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US7580131B2 (en) | 2007-04-17 | 2009-08-25 | Asml Netherlands B.V. | Angularly resolved scatterometer and inspection method |
US7869022B2 (en) | 2007-07-18 | 2011-01-11 | Asml Netherlands B.V. | Inspection method and apparatus lithographic apparatus, lithographic processing cell, device manufacturing method and distance measuring system |
NL1036245A1 (nl) | 2007-12-17 | 2009-06-18 | Asml Netherlands Bv | Diffraction based overlay metrology tool and method of diffraction based overlay metrology. |
NL1036597A1 (nl) | 2008-02-29 | 2009-09-01 | Asml Netherlands Bv | Metrology method and apparatus, lithographic apparatus, and device manufacturing method. |
CN102203676B (zh) | 2008-11-07 | 2013-12-04 | Asml荷兰有限公司 | 散射仪和光刻设备 |
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JP5545782B2 (ja) | 2009-07-31 | 2014-07-09 | エーエスエムエル ネザーランズ ビー.ブイ. | リソグラフィ装置の焦点測定方法、散乱計、リソグラフィシステム、およびリソグラフィセル |
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NL2011816A (en) | 2012-11-30 | 2014-06-04 | Asml Netherlands Bv | Method of determining dose and focus, inspection apparatus, patterning device, substrate and device manufacturing method. |
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US20150145151A1 (en) * | 2012-07-05 | 2015-05-28 | Asml Netherlands B.V. | Metrology Method and Apparatus, Lithographic System, Device Manufacturing Method and Substrate |
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US20160363871A1 (en) * | 2015-06-12 | 2016-12-15 | Asml Netherlands B.V. | Inspection Apparatus, Inspection Method, Lithographic Apparatus, Patterning Device and Manufacturing Method |
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WO2018108499A1 (en) | 2018-06-21 |
CN110088683A (zh) | 2019-08-02 |
EP3336606A1 (en) | 2018-06-20 |
US20180173113A1 (en) | 2018-06-21 |
IL267310A (en) | 2019-08-29 |
TWI672569B (zh) | 2019-09-21 |
US10317805B2 (en) | 2019-06-11 |
KR102279030B1 (ko) | 2021-07-19 |
CN110088683B (zh) | 2021-08-24 |
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