Patent ID: 8034537

Claim:
A positive resist composition comprising: (A) a resin that has an acid decomposable repeating unit represented by the following formula (I) 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 a group which decomposes by action of an acid; and (D) a solvent, wherein the resin (C) is different from the resin (A), and the amount of the resin (C) is from 0.1 to 10 mass % based on the total solid content of the composition: wherein, in formula (I) Xa 1 represents a hydrogen atom or a methyl group, Ry 1 to Ry 3 each independently represents an alkyl group or a cycloalkyl group, and at least two of Ry 1 to Ry 3 may be coupled to form a ring structure, and Z represents a divalent linking group.