Photomask for electrophotography
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United States of America Patent
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Jun 2, 1987
Issued Date -
N/A
app pub date -
May 31, 1985
filing date -
May 18, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention provides a master for use in image transfer by contact printing onto a transparent electrophotographic (TEP) film, which comprises an electrically insulating substrate having a planar surface which carries image elements deposited thereon; and a thin transparent insulating layer covering said planar surface and said image elements. The surface of the thin transparent insulating material is preferably profiled so that it comprises a base level and raised portions extending above said base level, the area of the raised portions being small compared to the total surface area of the transparent insulating layer. A thin transparent electrode may be incorporated between the substrate and the thin transparent insulating layer. Methods of forming such a master and of contact printing with it are also disclosed.
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