Image-forming process

Details Image-forming process Image-forming process

1996-06-13

1998-05-12

Duda, Kathleen

Radiation imagery chemistry: process, composition, or product th

Imaged product

Structurally defined

427 96, 118125, G03F 700

Patent

active

057502919

ABSTRACT:
A process for the formation of a patterned resist of a photocurable material on a circuit board, the uncured portion of which is water soluble. The process includes the steps of forming a layer of an aqueous emulsion of a photocurable material upon the circuit board, drying the layer to a substantially dry and non-tacky state, imagewise exposing the layer to radiation to cure portions of the layer exposed to the radiation, and removing unexposed portions of the layer by washing with water. In a preferred embodiment, the photocurable material is an organic solvent solution of an epoxy acrylate derived from an epoxy novolac resin which has been carboxylated to render it alkali-developable.

REFERENCES:
patent: 4154614 (1979-05-01), Tsunoda
patent: 4592816 (1986-06-01), Emmons
patent: 5093223 (1992-03-01), Iwasawa

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