Patent ID: 6517988
Filing Date: 2003-02-11
Classification: G03F

Abstract:
A radiation-sensitive composition comprising:(a) at least one quinonediazide compound, and (b) at least one copolymer comprising the units A, B, C and D, wherein:unit A has the formula wherein R is hydrogen or C1-C4 alkyl, unit B has the formula unit C has the formula wherein R1 is C1-C4 alkyl and unit D is a unit comprising at least one free carboxyl group selected from the group consisting of straight chain C1-C4 alkylenes having at least one carboxyl substituent, straight-chain C2-C4 alkenylenes having at least one carboxyl substituent, divalent groups represented by formula D1, â€ƒdivalent groups represented by formula (D2), â€ƒand divalent groups represented by formula (D3) where X is selected from the group consisting of phenylene, phenylenes substituted with one or more C1-C4 alkyl groups, benzofused phenylenes, and divalent groups of the following formula where Z is an aliphatic, aromatic or araliphatic spacer group, R2 is hydrogen or an aliphatic, aromatic or araliphatic group, and Y is a saturated or unsaturated chain- or ring-shaped spacer group.