Water-soluble photoinitiators

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

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430296, 430311, 430313, 430325, 430326, 430330, 430921, 522 31, 522129, 522146, 522160, 522166, 522 88, G03C 1492, G03C 1494, G03C 500, C08F 246

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active

056481969

ABSTRACT:
The present invention provides positive-tone and negative-tone photoresists including a photoinitiator comprising a compound of Formula (I): ##STR1## wherein R.sub.1 and R.sub.2 are independently selected from C.sub.1 -C.sub.6 alkyl; n is a number from 2 to 5, and An.sup.- is an anion. The photoinitiator comprising the compound of Formula (I) being soluble in water. Methods of preparing positive-tone and negative-tone photoresists are also provided.

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