C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
204/91.79
C08J 3/28 (2006.01) G03F 7/038 (2006.01)
Patent
CA 1137441
CURING OF POLYAMIC ACIDS OR SALTS THEREOF BY ULTRAVIOLET EXPOSURE Abstract A process for curing a film of polyamic acid or a salt thereof to the corresponding polyimide in the absence of externally applied heat comprising exposing the film to ultraviolet radiation for a sufficient time and at a sufficient intensity to cure same. The film can be selectively exposed in an imagewise fashion through an appropriate mask followed by developing to remove unexposed areas.
351615
Minnesota Mining And Manufacturing Company
Smart & Biggar
LandOfFree
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