Patent ID: 6140018
Filing Date: 2000-10-31
Classification: G03F,Y10S

Abstract:
A saponified poly(vinyl acetate) photosensitive resin which contains structural units represented by formulas (I) and (II) ##STR8## wherein R.sub.1 represents an alkyl group, an aralkyl group, or a lower alkoxycarbonyl group, any of which groups can have a hydroxyl group, a carbamoyl group, an ether linkage, or an unsaturated group; R.sub.2 represents a hydrogen atom or a lower alkoxy group; m is 0 or 1; n is an integer between 1 and 6 inclusive; a moiety represented by the following formula: ##STR9## which represents a cationic portion of a quaternary aromatic azo-heterocyclic group; X.sub.1.sup.- represents an anion derived from an organic polybasic acid having a pK.sub.1 of 3.5 or less which organic polybasic acid is selected from the group consisting of oxalic acid, tartaric acid, dihydroxytartaric acid, maleic acid, iminodiacetic acid, and nitrilotriacetic acid; and X.sub.2.sup.- represents an anion other than X.sub.1.sup.-, the content of the structural units represented by formulas (I) and (II) in the resin being about 0.5-10 mol % with respect to the entirety of the structural units of the saponified product of PVA.