Patent ID: 7195856

Claim:
A positive resist composition comprising (A1) a resin that is decomposed by the action of an acid to increase solubility in an alkali developing solution and includes at least one repeating unit represented by formula (I) shown below and (B) a compound that generates an acid upon irradiation of an actinic ray or radiation: wherein R 1a to R 3a each independently represents a hydrogen atom, a halogen atom, a cyano group or an alkyl group, provided that at least one of R 1a to R 3a represents an alkyl group having at least one group represented by formula (A) shown below, X 2 represents —ORa, —SRa or —N(Rb)(Ra), Ra represents a hydrogen atom or a monovalent organic group, and Rb represents a hydrogen atom or an alkyl group, wherein R 31 to R 36 each independently represents a hydrogen atom, a fluorine atom or an alkyl group, provided that at least one of R 31 to R 36 represents a fluorine atom or an alkyl group in which at least one of the hydrogen atoms is substituted with a fluorine atom, Y 1 represents a hydrogen atom or a monovalent organic group, and L x represents a divalent connecting group.