Process for the formation of an image

Details Process for the formation of an image Process for the formation of an image

G - Physics

03

F

96/220

G03F 7/022 (2006.01) G03C 1/72 (2006.01) G03F 7/16 (2006.01) G03F 7/20 (2006.01) H05K 3/06 (2006.01)

Patent

CA 1333855

A process for the formation of an image comprises (i) electrodepositing on a conductive surface a layer of a 1,2-naphthoquinone-2-diazide-5-sulphonyl erster positive photoresist, (ii) subjecting the layer to radiation in a predetermined pattern, (iii) heating the layer such that areas thereof exposed in stage (ii) are rendered insoluble in an aqueous base developer, (iv) subjecting the layer to radiation such that the areas not exposed in stage (ii) are rendered more soluble in an aqueous base developer than the areas rendered insoluble in stage (iii) and (v) removing the areas not exposed in stage (ii) by treatment with an aqueous base developer. The process is useful in the production of printing plates and printed circuits.

563618

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