Patent ID: 7318992

Claim:
A lift-off positive resist composition comprising a base resin component (A) and an acid generator component (B) generating an acid under exposure, wherein the base resin component (A) is a silicone resin component (A1) which contains 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), wherein the silicon content is from 5 to 30% by weight based on the total solid content of the lift-off positive resist composition.