Method of forming images

Details Method of forming images Method of forming images

G - Physics

03

F

96/165, 96/223

G03F 7/016 (2006.01) G03F 7/023 (2006.01) G03F 7/16 (2006.01)

Patent

CA 1336047

A process for the formation of an image comprises (i) electrodepositing on a conductive surface a photosensitive film from an aqueous composition which is a solution or dispersion comprising a mixture of (A) a photosensitive o-quinone diazide such as an o-naphthoquinone diazide sulfonyl ester of a phenol, and (B) an electrodepositable film-forming resin such as a reaction product of a novolak resin, formaldehyde and diethanol- amine in (C) an aqueous medium, the composition being substantially free from a resin having both a quinone diazide residue and a carboxyl, phosphonic or sulfonic acid group or amino group in the same molecule, (ii) subjecting the electro- deposited film to radiation in a predetermined pattern, such that exposed areas of the film become more soluble in aqueous base than unexposed areas, and (iii) removing the exposed areas by treatment with an aqueous base. The process is useful in the production of printing plates and printed circuits.

549805

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