Patent ID: 7416832
Filing Date: 2008-08-26
Classification: G03F,Y10S

Abstract:
1. A positive resist composition comprising a base resin component (A) and an acid generator component (B) generating an acid under exposure, which are dissolved in an organic solvent, wherein the base resin component (A) is a silicone resin, and the organic solvent contains propylene glycol monomethyl ether and a solvent (S2) having a boiling point higher than that of the propylene glycol monomethyl ethes, wherein the content of the propylene glycol monomethyl ether in the organic solvent is from 10 to 60% by weight, wherein the base resin component (A) is a resin component (Ar) having an acid dissociable dissolution inhibiting group, the dissociation inhibiting group being dissociated by an action of an acid thereby enhancing alkali solubility, wherein the solvent (S2) comprises ethyl lactate; and the resin component (A1) contains a silsesquloxane resin (A12) comprising a constituent unit (a1) represented by the following general formula (I): wherein R 1 represents a linear or branched alkylene group having 1 to 5 carbon atoms, and a constituent unit (a5) represented by the following general formula (V): wherein R 5 represents a linear or branched alkylene group having 1 to 5 carbon atoms, R 6 represents an alkyl group having 1 to 5 carbon atoms, R 7 represents an alkyl group having 1 to 5 carbon atoms or a hydrogen atom, and R 8 represents an alicyclic hydrocarbon group having 5 to 15 carbon atoms, and a silsesquioxane resin (A11) comprising a constituent unit (a1) represented by the following general formula (I): wherein R 1 represents a linear or branched alkylene group having 1 to 5 carbon atoms, a constituent unit (a2) represented by the following general formula (II): wherein R 2 represents a linear or branched alkylene group having 1 to 5 carbon atoms, and R 3 represents an acid dissociable dissolution inhibiting group, and a constituent unit (a3) represented by the following general formula (III)