Patent ID: 8182975

Claim:
A positive resist composition, comprising: (A) a resin that has a group having absorption at 248 nm at a main chain terminal of the resin (A), the main chain terminal of the resin (A) being represented by formula (M′-1): wherein R 1 and R 2 each independently represents a hydrogen atom, an alkyl group, a hydroxyl group, an alkoxy group, a halogen atom, a cyano group, a nitro group, an acyl group, an acyloxy group, a cycloalkyl group, an aryl group, a carboxyl group, an alkyloxycarbonyl group, an alkylcarbonyloxy group or an aralkyl group; and Y represents a group having absorption at 248 nm and comprises: (i) at least a hetero ring; or (ii) two or more benzene rings, wherein the resin (A) decomposes under an action of an acid to increase a solubility of the resin (A) in an alkali developer.