Enlargement of photopolymer images in photopolymer mask

Details Enlargement of photopolymer images in photopolymer mask Enlargement of photopolymer images in photopolymer mask

1983-06-30

1985-05-21

Kittle, John E.

Radiation imagery chemistry: process, composition, or product th

Radiation modifying product or process of making

Screen other than for cathode-ray tube

430281, 430309, 430311, 430319, 430322, 430325, G03F 900

Patent

active

045186669

ABSTRACT:
Process of enlarging image areas covered by a stencil or relief image area formed in a photopolymer mask consisting essentially of (a) contacting said image area with a swelling agent and optionally a diluent to effect enlargement, and (b) removing excess swelling agent, i.e., evaporation, air impingement including heating. Additional image enlargement is possible by further contacting the image with a more concentrated swelling agent. The process is particularly useful in enlarging halftone image dots of photopolymer litho masks wherein the halftone image areas consist of hardened upper skins which rest on softer undervolumes having a lesser degree of polymerization or hardening.

REFERENCES:
patent: 4094679 (1978-06-01), Washizawa et al.
patent: 4173673 (1979-11-01), Bratt et al.
patent: 4287277 (1981-09-01), Matsumoto et al.
patent: 4343876 (1982-08-01), Heiart et al.

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