Patent ID: 7803513

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): A′ +− E (II) wherein A′ + represents at least one organic cation selected from cations represented by the above-mentioned formulae (Ia), (Ib) and (Ic), and E − represents an anion represented by the formula (II-1): − O 3 SQ 3 (II-1) wherein Q 3 represents a C1-C10 perfluoroalkyl group, 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.