Photocopying – Projection printing and copying cameras – Step and repeat
Reexamination Certificate
2007-12-25
2007-12-25
Lauchman, Layla G. (Department: 2877)
Photocopying
Projection printing and copying cameras
Step and repeat
C356S401000
Reexamination Certificate
active
11548360
ABSTRACT:
A substrate alignment apparatus which aligns and fixes a substrate on a substrate stage includes a chucking pad fixed on the substrate stage to chuck and fix the substrate, a moving unit which moves the substrate with respect to the substrate stage such that a mark on the substrate stage and a mark on the substrate coincide with each other, and a determination unit which evaluates and controls a relative position between the chucking pad and the substrate after movement by the moving unit and determines whether the chucking pad can normally chuck the substrate.
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Lauchman Layla G.
Underwood Jarreas
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