Patent ID: 7332258

Claim:
A positive resist composition comprising: (A) a resin containing a repeating unit represented by the following formula (1) and a repeating unit represented by the following formula (2), the resin being insoluble or slightly soluble in an alkali developer and becoming soluble in an alkali developer by an action of an acid, (B) a compound generating a sulfonic acid compound represented by the following formula (3) upon irradiation of actinic ray or radiation, and (C) a compound generating a non-aromatic sulfonic acid compound upon irradiation of actinic ray or radiation, wherein R 01 represents a hydrogen atom, a methyl group, a cyano group, a halogen atom or a perfluoro group having from 1 to 4 carbon atoms, R 02 and R 03 each independently represents an alkyl group, and X represents an acid decomposable group having an alicyclic group, wherein R 04 represents a hydrogen atom or a methyl group, R 05 represents a hydrogen atom, an alkyl group, a halogen atom, an aryl group, an alkoxy group or an acyl group, and n represents an integer of from 0 to 4, wherein Ra to Re each independently represents a hydrogen atom, an unsubstituted alkyl group or an alkyl group substituted with an aryl group, a hydroxyl group or an alkoxy group, a cycloalkyl group, an alkoxy group, a hydroxyl group, a carboxyl group, an alkyloxycarbonyl group, an alkylcarbonyloxy group, an aryl group or an aralkyl group, wherein the resin (A) further contains a repeating unit represented by the following formula (4): wherein R 04 , R 05 and n have the same meanings as R 04 , R 05 and n in formula (2) respectively, and W represents a group that is not decomposed by an action of an acid.