Photocopying – Projection printing and copying cameras – Step and repeat
Reexamination Certificate
2006-05-23
2006-05-23
Nguyen, Henry Hung (Department: 2851)
Photocopying
Projection printing and copying cameras
Step and repeat
C355S030000
Reexamination Certificate
active
07050152
ABSTRACT:
An exposure apparatus for exposing an object put on a first stage by irradiating light from a light source onto the object through an exposure optical system includes a partition for isolating a first space where the first stage is arranged and isolating a second space where the exposure optical system is arranged, a first management part that manages a degree of vacuum of the first space, and a second management part that manages a degree of vacuum of the second space.
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patent: 6791661 (2004-09-01), Sato
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patent: 7-263322 (1995-10-01), None
patent: 2002-529927 (2002-09-01), None
patent: 00/28384 (2000-05-01), None
Hasegawa Noriyasu
Terashima Shigeru
Canon Kabushiki Kaisha
Morgan & Finnegan , LLP
Nguyen Henry Hung
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