Patent ID: 8507176
Filing Date: 2013-08-13
Classification: C08F,G03F,Y10S

Abstract:
1. A polymer comprising a polymer backbone and a monomeric photoacid generator covalently attached to the polymer backbone, wherein the monomeric photoacid generator is derived from one or more sulfonium salt or iodonium salt having a polymerizable sulfonate anion represented by formula (1a) or formula (1b), respectively: wherein: Y is hydrogen, alkyl, fluorinated alkyl or fluorine; R 1 , R 2 , R 3 , R 4 and R 5 are independently chosen from substituted and unsubstituted aryl; and Z is a substituted aromatic group covalently bonded to the sulfonate anion via a straight or branched perfluorinated-alkyl chain comprising a terminal CF 2 , C(F)(CF 3 ) or C(CF 3 ) 2 .