Patent ID: 7138217

Claim:
A positive resist composition comprising: (A) a resin capable of decomposing by the action of an acid to increase the solubility in an alkali developer; and (B) a compound capable of generating an acid upon irradiation with one of an actinic ray and a radiation, wherein the resin (A) contains a repeating unit represented by formula (I): wherein R 1 represents a hydrogen atom, a halogen atom, cyano group, an alkyl group which may be substituted or haloalkyl group which may be substituted: R 2 and R 3 , which are the same or different, each independently represents a hydrogen atom, hydroxyl group, a halogen atom, cyano group, an alkoxy group, an acyl group, an alkyl group which may be substituted, cycloalkyl group which may be substituted, alkenyl group which may be substituted, aralkyl group which may be substituted or aryl group group which may be substituted; R 4 represents a hydrogen atom, an alkyl group which may be substituted, perfluoroalkyl group which may be substituted, cycloalkyl group which may be substituted, acyl group which may be substituted, alkoxycarbonyl group which may be substituted, alkoxycarbonylmethyl group which may be substituted or a group represented by formula (II): wherein R 5 and R 6 , which are the same or different, each independently represents a hydrogen atom, an alkyl group which may be substituted or cycloalkyl group which may be substituted; R 7 represents an alkyl group which may be substituted, perfluoroalkyl group which may be substituted, cycloalkyl group which may be substituted, perfluorocycloalkyl group which may be substituted, aralkyl group which may be substituted or aryl group which may be substituted; two of R 5 , R 6 and R 7 may combine with each other to form a ring, the positive resist composition further comprising a surfactant containing at least one of a flourine atom and a silicon atom.