Patent ID: 7179581
Filing Date: 2007-02-20
Classification: G03F,Y10S

Abstract:
1. A positive-working resist composition comprising: (A) a polar functional group-bearing nitrogen heterocyclic compound of the following general formula (1) or (2): wherein A is a nitrogen atom or —C(R 7 )═B is a nitrogen atom or —C(R 8 )═R 1 is a straight, branched or cyclic alkyl group of 2 to 20 carbon atoms bearing at least one polar function group selected from among hydroxyl, carbonyl, ester, ether, sulfide, carbonate, cyano and acetal groups; R 2 , R 3 , R 4 and R 5 are each independently a hydrogen atom, a straight, branched or cyclic alkyl group of 1 to 10 carbon atoms or an aryl group of 6 to 10 carbon atoms, or a pair of R 2 and R 3 and a pair of R 4 and R 5 may bond together to form a benzene, naphthalene or pyridine ring with the carbon atoms to which they are bonded; R 6 is a hydrogen atom, a straight, branched or cyclic alkyl group of 1 to 10 carbon atoms or an aryl group of 6 to 10 carbon atoms; R 7 and R 8 are each a hydrogen atom, a straight, branched or cyclic alkyl group of 1 to 10 carbon atoms or an aryl group of 6 to 10 carbon atoms, or R 6 and R 8 may bond together to form a benzene or naphthalene ring with the carbon atoms to which they are bonded; (B) an organic solvent; (C) a base resin having an acid labile group-protected acidic functional group which is alkali-insoluble or substantially alkali-insoluble, but becomes alkali-soluble when the acid-labile group is eliminated; and (D) a photoacid generator.