Negative-type photosensitive composition

Details Negative-type photosensitive composition Negative-type photosensitive composition

1998-09-09

1999-12-28

Baxter, Janet

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

4302871, 522149, G03C 1725, C08J 328

Patent

active

060079665

ABSTRACT:
A photosensitive composition is disclosed particularly for making printed circuit boards. It contains: (a) a polymer binder; (b) a photoinitiator; and (c) an unsaturated photomonomer. The polymer binder is prepared from a reaction among the following reactants: (i) a styrene-maleic anhydride resin containing repeating units of styrene and anhydride groups, (ii) an unsaturated compound containing at least one hydroxy group and at least three acrylic groups, and (iii) a saturated alcohol. The styrene-maleic anhydride resin is prepared from a polymerization reaction of styrene and maleic anhydride in a molar ratio ranging from 3:1 to 1:1, and preferably has a molecular weight between 800 and 100,000.

REFERENCES:
patent: 4722947 (1988-02-01), Thanawalla et al.
patent: 5087552 (1992-02-01), Horigome et al.
patent: 5114830 (1992-05-01), Surber
patent: 5296334 (1994-03-01), Castaldi
patent: 5936005 (1999-08-01), Askienazy et al.

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