Patent ID: 8343708

Claim:
A positive resist composition comprising: (A) a resin that has an acid decomposable repeating unit represented by the following formula (I) and a repeating unit having a lactone structure represented by the following formula (LC1-4) and increases its solubility in an alkali developer by action of an acid; (B) a compound that generates an acid in irradiation with actinic light or radiation; (C) a resin that has: at least one of a fluorine atom and a silicon atom; and the following group (x) or group (y); and (D) a solvent: (x) an alkali soluble group, (y) a group which decomposes by action of an alkali developer and increases a solubility of the resin (C) in an alkali developer, wherein, the resin (C) is different from the resin (A), and the content of the resin (C) is from 0.1 to 10 mass %, based on the total solid content of the composition, wherein, Xa 1 represents a hydrogen atom, an alkyl group, a cyano group or a halogen atom, Ry 1 to Ry 3 each independently represents an alkyl group or a cycloalkyl group, provided that at least two of Ry 1 to Ry 3 are coupled to form a ring structure or Ry 1 represents a cycloalkyl group, and Z represents a divalent linking group, wherein Rb′ 2 represents a substituent, n2 stands for an integer from 0 to 4, when n2 is 2 or greater, a plurality of Rb′ 2 s may be the same or different, or the plurality of Rb′ 2 s may be coupled to form a ring.