Photocopying – Projection printing and copying cameras – With temperature or foreign particle control
Patent
1997-06-19
1999-10-26
Metjahic, Safet
Photocopying
Projection printing and copying cameras
With temperature or foreign particle control
G01J 100
Patent
active
059737646
ABSTRACT:
A vacuum manifold having a rectangular opening with vacuum access bores connected into the rectangular opening for an illumination field to be projected there through. A vacuum manifold is placed between a photosensitive resist covered wafer and a lens element in a photolithographic tool. The relatively high illumination energy in an illumination field used for projecting an image of a reticle onto a photosensitive resist covered wafer often results in ablated, evaporated, and effused material being coated on the lens element. The vacuum manifold placed between the lens element and the photosensitive resist covered wafer creates an airflow for removing debris or contamination preventing coating of the lens surface. This prevents image quality from degradation over time, as well as reduces downtime needed for cleaning or maintenance of the photolithographic tool.
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McCullough Andrew W.
Olson Sean
Dalakis Michael
Fattibene Arthur T.
Fattibene Paul A.
Metjahic Safet
SVG Lithography Systems, Inc.
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