Patent ID: 7741007

Claim:
A chemically amplified resist composition comprising: (A) a salt represented by the formula (I): wherein R 21 represents a C1-C30 hydrocarbon group which may be substituted, and at least one —CH 2 — in the hydrocarbon group may be substituted by —CO— or —O—, Q 1 and Q 2 each independently represent a fluorine atom or a C1-C6 perfluoroalkyl group, and A + represents at least one organic cation selected from a cation represented by the formula (Ia): wherein P 1 , P 2 and P 3 each independently represent a C1-C30 alkyl group which may be substituted with at least one selected from a hydroxyl group, a C3-C12 cyclic hydrocarbon group and a C1-C12 alkoxy group, or a C3-C30 cyclic hydrocarbon group which may be substituted with at least one selected from a hydroxyl group and a C1-C12 alkoxy group, a cation represented by the formula (Ib): 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, and a cation represented by the formula (Ic): 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 m represents 0 or 1, (B) a salt represented by the formula (II): wherein R 22 represents a C1-C30 hydrocarbon group which may be substituted, and at least one —CH 2 — in the hydrocarbon group may be substituted by —CO— or —O—, Q 3 and Q 4 each independently represent a fluorine atom or a C1-C6 perfluoroalkyl group, and A ′+ represents an organic cation represented by the formula (IIa): 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 are bonded to form a C3-C12 divalent acyclic hydrocarbon group which forms a ring together with the adjacent S + , and at least one —CH 2 — in the divalent acyclic hydrocarbon group may be substituted with —CO—, —O— or —S—, P 8 represents a hydrogen atom, P 9 represents a C1-C12 alkyl group, a C3-C12 cycloalkyl group or an aromatic group which may be substituted, or P 8 and P 9 are bonded to form a divalent acyclic hydrocarbon group which forms a 2-oxocycloalkyl group together with the adjacent —CHCO—, and at least one —CH 2 — in the divalent acyclic hydrocarbon group may be replaced with —CO—, —O— or —S—; and (C) a resin which contains a structural unit having an acid-labile group and which itself is insoluble or poorly soluble in an aqueous alkali solution but becomes soluble in an aqueous alkali solution by the action of an acid.