Patent ID: 9291909
Filing Date: 2016-03-22
CPC Classification: C08F,C08L,C09D,G03F,H01L

Claim Text:
1. An aqueous coating solution of a polymeric thermal acid generator capable of forming a layer over a photoresist pattern, where the aqueous coating solution comprises a polymer having at least one repeating unit of structure 2 where R 1 to R 5 are independently chosen from the group consisting of H and C 1 -C 6 alkyl; Re is chosen from the group consisting of aryl, substituted aryl, alkyl (C 1 -C 8 ) and fluoroalkyl (C 1 -C 8 ) and W is a C 2 -C 6 alkylene spacer group and further where the polymer further comprises a repeating unit of structure 3, where, R 7 to R 9 are independently selected from hydrogen and C 1 to C 6 alkyl, A is selected from a single bond, O, C(O), (C═O)O, C 1 to C 4 alkylene; X, Y, Z and N form a cyclic structure, further where, X is selected from C 1 to C 6 alkylene, unsaturated C 1 to C 6 alkylene, direct bond, and mixtures thereof, Y is selected from C 1 to C 6 alkylene, unsaturated C 1 to C 6 alkylene, direct bond, and mixtures thereof, Z is selected from oxygen, C(O) and nitrogen and further where the aqueous coating solution is free of a crosslinking compound and further where the polymer has a molecular weight range of 5,000 to 200,000 g/mol.