Patent ID: 7566522

Claim:
A chemically amplified resist composition comprising: a resin which comprises a structural unit having an acid-labile group and a structural unit represented by the formula (I): wherein R 1 represents a hydrogen atom or a methyl group, ring X represents a C3-C30 cyclic hydrocarbon group in which one —CH 2 — is substituted with —COO—, and at least one hydrogen atom in the C3-C30 cyclic hydrocarbon group may be substituted, and p represents an integer of 1 to 4, and which itself is insoluble or poorly soluble in an alkali aqueous solution but becomes soluble in an alkali aqueous solution by the action of an acid, and a salt represented by the formula (II): wherein Y 1 and Y 2 each independently represent a fluorine atom or a C1-C6 perfluoroalkyl group, A + represents an organic counter ion, and R 21 represents a C1-C30 hydrocarbon group which may be substituted and at least one —CH 2 — in the C1-C30 hydrocarbon group may be substituted with —CO— or —O—.