Patent ID: 8334087

Claim:
A radiation-sensitive composition comprising: (A) an acid-dissociable group-containing polymer; (B) a radiation-sensitive acid generator; and (C) an acid diffusion controller, the acid-dissociable group-containing polymer (A) comprising a repeating unit shown by a following general formula (1), wherein R 1 represents a hydrogen atom, a methyl group, a fluorine atom, or a trifluoromethyl group, R 2 represents a substituted or unsubstituted aryl group having 6 to 22 carbon atoms, Y represents a carbon atom, and X represents an atomic group that forms an alicyclic hydrocarbon group together with Y, and wherein the content of the repeating unit (1) is from 1 mol % to 70 mol % based on the total amount (100 mol %) of the repeating units that form the polymer (A).