Photocopying – Projection printing and copying cameras – Distortion introducing or rectifying
Reexamination Certificate
2006-11-14
2006-11-14
Nguyen, Henry Hung (Department: 2851)
Photocopying
Projection printing and copying cameras
Distortion introducing or rectifying
C355S053000
Reexamination Certificate
active
07136144
ABSTRACT:
A reticle stage grid and yaw in a projection imaging tool is determined by exposing a first portion of a reticle pattern onto a substrate with a recording media thereby producing a first exposure. The first portion of the reticle pattern includes at least two arrays of alignment attribute that have features complementary to each other. The reticle stage is then shifted and a second portion of the reticle pattern is exposed. The first and second exposures overlap and interlock to create completed alignment attributes. Measurements of positional offsets of the completed alignment attributes are used to determine the reticle stage grid and yaw.
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Hunter, Jr. Robert O.
McArthur Bruce B.
Smith Adlai H.
Litel Instruments
Nguyen Henry Hung
LandOfFree
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