Photoimageable compositions having improved chemical resistance

Details Photoimageable compositions having improved chemical resistance Photoimageable compositions having improved chemical resistance

2000-03-08

2000-12-26

Baxter, Janet

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

560205, 525285, C07C 6726, C07C 6954, C08F26704

Patent

active

061662453

ABSTRACT:
A negative-acting photoimageable composition useful as a primary imaging resist in the manufacture of printed circuit boards comprises an acid-functional binder polymer, a photopolymerizable component, and a photoinitiator chemical system, in which the binder polymer has an anhydride functional backbone half-esterified with a meth(acrylate) functional hydroxy-terminated oligomer, wherein the meth(acrylate) functionality is separated from the half-ester linkage by at least two alkoxylate groups and at least one ring opened lactone group for improved stripping ability in strong alkaline aqueous stripping solutions, while maintaining good chemical resistance to other processing chemicals, such as alkaline developing solutions, acid etching solutions, and acid plating baths.

REFERENCES:
patent: 4963601 (1990-10-01), Shibato et al.

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