Patent ID: 7932334

Claim:
A resin which generates an acid by irradiation and is a salt of an organic cation and an anionic polymer wherein the anionic polymer has no carbon-carbon unsaturated bond, and the anionic polymer comprises a structural unit represented by the formula (Ia): wherein R represents a hydrogen atom, a C1-C4 alkyl group or a C1-C4 perfluoroalkyl group, Q 1 represents a divalent connecting group having no carbon-carbon unsaturated bond, and Z 1 and Z 2 are the same or different and each independently represent a fluorine atom or a C1-C4 perfluoroalkyl group, or a structural unit represented by the formula (Ib): wherein Q 2 represents a divalent connecting group having no carbon-carbon unsaturated bond, Z 3 and Z 4 are the same or different and each independently represent a fluorine atom or a C1-C4 perfluoroalkyl group, U represents a hydrogen atom, a C1-C4 alkyl group, a monovalent polar group having at least one atom selected from the group consisting of an oxygen atom and a nitrogen atom and no carbon-carbon unsaturated bond, and m represents 0, 1 or 2, and the organic cation is a cation represented by the formula (IIa): wherein P 1 , P 2 and P 3 each independently represent a C1-C20 alkyl group which is optionally substituted with at least one selected from the group consisting of a hydroxyl group and a C1-C12 alkoxy group, or a C3-C30 cyclic hydrocarbon group which is optionally substituted with at least one selected from the group consisting of a hydroxyl group and a C1-C12 alkoxy group, a cation represented by the formula (IIb): wherein P 4 and P 5 each independently represent a hydrogen atom, a hydroxyl group, a C1-C12 alkyl group or a C1-C12 alkoxy group, a cation represented by the formula (IIc): wherein P 6 and P 7 each independently represent a C1-C12 alkyl group or a C3-C12 cycloalkyl group, or P 6 and P 7 bond to form a C3-C12 divalent hydrocarbon group which forms a ring together with the adjacent S + , and at least one —CH 2 — in the divalent hydrocarbon group is optionally replaced with —CO—, —O— or —S—, P 8 represents a hydrogen atom, P 9 represents a C1-C12 alkyl group, a C3-C12 cycloalkyl group, a phenyl group, a tolyl group, a xylyl group, a naphthyl group, a methoxyphenyl group, a nitrophenyl group, a butylphenyl group, an isobutylphenyl group, a tert-butylphenyl group, a cyclohexylphenyl group, a phenylphenyl group or a 1-adamantylcarbonyloxyphenyl group, or P 8 and P 9 bond to form a divalent hydrocarbon group which forms a 2-oxocycloalkyl group together with the adjacent —CHCO—, and at least one —CH 2 — in the divalent hydrocarbon group is optionally replaced with —CO—, —O— or —S—, or a cation represented by the formula (IId): wherein P 10 , P 11 , P 12 , P 13 , P 14 , P 15 , P 16 , P 17 , P 18 , P 19 , P 20 , and P 21 each independently represent a hydrogen atom, a hydroxyl group, a C1-C12 alkyl group or a C1-C12 alkoxy group, B represents a sulfur or oxygen atom and n represents 0 or 1.