Process of making and using a positive working photosensitive fi

Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Forming nonplanar surface

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1563082, 1563244, 430270, 430271, 430275, 430311, G03C 500

Patent

active

045769028

ABSTRACT:
A positive working photosensitive film resist material suitable for multiple image-wise exposure comprises, on a dimensionally stable base film, a photosensitive coating which contains (a) a polymer which possesses aromatic or hetero-aromatic o-nitrocarbinol ester groups (for example o-nitrobenzyl acrylate units) and which can be washed out, after exposure, with an alkaline solvent, and (b) a transparent plasticizer compatible with (a). The product may be used as photopolymer dry film resist material in the production of electrical conductor boards, chemically milled fine-line parts, and identification plates.

REFERENCES:
patent: 3849137 (1974-01-01), Barzynski et al.
patent: 4006013 (1977-02-01), McLaughlin et al.
patent: 4035139 (1977-07-01), Hayashi et al.

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