Photocopying – Projection printing and copying cameras – Step and repeat
Reexamination Certificate
2006-07-07
2010-11-16
Nguyen, Hung Henry (Department: 2882)
Photocopying
Projection printing and copying cameras
Step and repeat
C355S055000, C355S072000
Reexamination Certificate
active
07834976
ABSTRACT:
An exposure apparatus includes a projection optical system for projecting a pattern on a reticle onto an object to be exposed. The apparatus also includes a reference mark that serves as a reference for an alignment between the reticle and the object. The apparatus also includes a first fluid that has a refractive index of 1 or greater, and fills a space between at least part of said projection optical system and the object and a space between at least part of said projection optical system and the reference mark. In addition, an alignment mechanism aligns the object by using said projection optical system and the first fluid.
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Kobayashi Naoyuki
Nei Masahiro
Nguyen Hung Henry
Nikon Corporation
Oliff & Berridg,e PLC
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