Patent ID: 7344821
Filing Date: 2008-03-18
Classification: G03F,Y10S

Abstract:
1. A positive resist composition for use with an electron beam, an EUV light or an X ray, the positive resist composition comprising: (A) at least one compound that generates an acid upon treatment with one of an actinic ray and radiation; and (B) a resin that increases a solubility of the resin (B) in an alkaline developer by an action of an acid, wherein the resin (B) consists essentially of a repeating unit represented by formula (II) and having an alicyclic group connected with a fluorine-substituted alcohol residue and a repeating unit represented by formula (B3): wherein Ra and Rb each independently represents a hydrogen atom, an alkyl group, a cyano group, a chlorine atom or a fluorine atom; A R Z represents an alkylene group, an oxygen atom or a sulfur atom; m represents an integer of 0 to 2; and Rc represents a hydrogen atom or an unsubstituted methyl group;