Patent ID: 7157206

Claim:
A positive resist composition comprising (A) a resin containing at least one group that is decomposed by the action of an acid to generate an alkali-soluble group and (B) at least two compounds selected from (B1) a compound that generates an aliphatic or aromatic sulfonic acid substituted with at least one fluorine atom, (B2) a compound that generates an aliphatic or aromatic sulfonic acid that does not contain a fluorine atom, (B3) a compound that generates an aliphatic or aromatic carboxylic acid substituted with at least one fluorine atom and (B4) a compound that generates an aliphatic or aromatic carboxylic acid that does not contain a fluorine atom, as (B) a compound that generates an acid upon irradiation of an actinic ray or radiation, wherein the group that is decomposed by the action of an acid contained in the resin (A) includes a group represented by the following formula (Y): wherein R 1y to R 6y each independently represents a hydrogen atom, a fluorine atom, an alkyl group or a cycloalkyl group, provided that at least one of R 1y to R 6y represents a fluorine atom, an alkyl group substituted with a fluorine atom or a cycloalkyl group substituted with a fluorine atom; and Y represents a hydrogen atom or an organic group.