Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Forming nonplanar surface
Patent
1987-09-28
1989-09-12
Dees, Jose G.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Forming nonplanar surface
430 28, 430270, 430323, 430330, G03C 500
Patent
active
048659533
ABSTRACT:
The method comprises applying to a surface to be etched a coating of a borax-free, low dichromate, casein photoresist liquid composition comprising an acid-precipitated casein, sodium hydroxide as an alkalizing agent, an alkali dichromate photosensitizer and water. The composition has a pH in the range of 6.0 to 7.0, and reduced quantities of the alkalizing agent and photosensitizer compared to prior coating compositions.
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Minnerly Kenneth G.
Rapp Kevin M.
Ritt Peter M.
Coughlin Jr. Vincent J.
Dees Jos,e G.
Irlbeck Dennis H.
Loney Donald J.
RCA Licensing Corp.
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