Sensor and lithographic apparatus

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system

Reexamination Certificate

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Details

C250S487100, C355S053000

Reexamination Certificate

active

07459669

ABSTRACT:
A sensor for use in a lithographic apparatus, the sensor having a liquid to prevent optical losses, especially when receiving radiation with a high NA. The liquid is fixed between two surfaces by capillary forces in an area through which radiation passes.

REFERENCES:
patent: 2002/0001088 (2002-01-01), Wegmann et al.
patent: 2005/0237504 (2005-10-01), Nagasaka et al.
patent: 2005/0243328 (2005-11-01), Wegmann et al.
patent: 2006/0181690 (2006-08-01), Nishinaga et al.
patent: 2007/0070323 (2007-03-01), Nagasaka
patent: 1 510 870 (2005-03-01), None
patent: 62-121417 (1987-06-01), None
patent: 8-298747 (1996-11-01), None

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