Patent ID: 6767686
Filing Date: 2004-07-27
Classification: G03F,Y10S

Abstract:
A chemically amplifying type positive resist composition comprising(A) a resin which has at least one polymerization unit selected from those represented by the following formula (IIa) or (IIb): â€ƒwherein R1 and R3 represent hydrogen or methyl, and R2, R4 and R5 represent alkyl; and which, per se, is insoluble or slightly soluble in alkali but becomes soluble in alkali by the action of an acid; and (B) a sulfonium salt acid generating agent represented by the following formula (I): â€ƒwherein Q1, Q2 and Q3 independently represent hydrogen, hydroxyl, alkyl having 1 to 6 carbon atoms or alkoxy having 1 to 6 carbon atoms; and Q4 represents perfluoroalkyl which may have a cyclic structure.