Patent ID: 7504194

Claim:
A positive resist composition comprising: (A) a resin that increases its solubility in an alkali developer by the action of an acid; (B) a compound being capable of generating an acid when irradiated with an actinic ray or a radiation; (C) a resin having at least one of a silicon-containing repeating unit represented by general formula (I) and a silicon-containing repeating unit represented by general formula (II) and being stable to acids but insoluble in an alkali developer; and (D) a solvent: wherein L represents a single bond or a divalent linking group; R 1 's each independently represents a hydrogen atom, a halogen atom, an alkyl group, a cycloalkyl group, an alkoxy group or an alkoxycarbonyl group; R 2 represents a monovalent organic group having at least one silicon atom; R 3 represents a hydrogen atom, a halogen atom, a cyano group or a monovalent organic group; Q represents an alicyclic structure; and k represents an integer of from 0 to 3.