Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1992-01-23
1993-07-13
Powell, William A.
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
156634, 156655, 156656, 1566591, 1566611, 156668, 156666, 156902, 252 795, 428209, B44C 122, C23F 100, B29C 3700
Patent
active
052270084
ABSTRACT:
A process for making flexible circuits wherein the etching of a polymeric film is accomplished by dissolving portions thereof with concentrated aqueous base using an aqueous processible crosslinked photoresist as a mask, comprising the steps of laminating the resist on a polymeric film, exposing a pattern into the resist, developing the resist with a dilute aqueous solution until desired image is obtained, etching portions of the polymeric film not covered by the crosslinked resist with a concentrated base at a temperature of from about 50.degree. C. to about 120.degree. C., and then stripping the resist off the polymeric film.
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Klun Thomas P.
Truong Thach G.
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Neaveill Darla P.
Powell William A.
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