Patent ID: 9250517
Filing Date: 2016-02-02
CPC Classification: G03F

Claim Text:
1. A polymer consisting of recurring units XA, recurring units B1 and/or B2 having a carboxyl and/or phenolic hydroxyl group whose hydrogen atom is substituted by an acid labile group, and recurring units C1 having a hydroxy-aromatic group and/or recurring units C2 having a 2,2,2-trifluoro-1-hydroxyethyl group, as represented by the general formula (1) and recurring units E having an adhesive group selected from the class consisting of hydroxyl, carboxyl, lactone ring, carbonate, thiocarbonate, carbonyl, cyclic acetal, ether, ester, sulfonic acid ester, and cyano with proviso that said recurring units E having an adhesive group being different from the recurring unit XA, B1, B2, C1, and C2, the polymer having a weight average molecular weight of 1,000 to 500,000, wherein R 1 and R 3 are each independently a C 1 -C 3 alkyl group, R 2 is hydrogen or a C 1 -C 3 alkyl group, R 4 is hydrogen or methyl, R 5 and R 7 are each independently hydrogen or methyl, R 6 and R 10 are each independently an acid labile group, R 8 is a single bond or a C 1 -C 6 straight or branched alkylene group, R 9 is hydrogen, fluorine, trifluoromethyl, cyano or a C 1 -C 6 straight, branched or cyclic alkyl group, p is 1 or 2, q is an integer of 0 to 4, Y 1 is a single bond, a C 1 -C 12 linking group having an ester radical, ether radical or lactone ring, phenylene group or naphthylene group, Y 2 is a single bond, —C(═O)—O— or —C(═O)—NH—, R 11 and R 13 are each independently hydrogen or methyl, W 1 and W 2 are each independently a single bond, phenylene group, —R 15 —C(═O)—O—R 16 —, —R 15 —O—R 16 —, or —R 15 —C(═O)—NH—R 16 —, R 15 is a single bond or a C 6 -C 10 arylene group, R 16 is a single bond or a C 1 -C 10 straight, branched, cyclic or bridged alkylene group, C 6 -C 10 arylene group, or C 2 -C 10 alkenylene group, which may contain an ether radical, ester radical or fluorine, R 12 is hydrogen, fluorine, trifluoromethyl, cyano, C 1 -C 6 straight, branched or cyclic alkyl, alkoxy, acyl, acyloxy, or alkoxycarbonyl group, R 14 is hydrogen, fluorine, methyl, trifluoromethyl, or difluoromethyl, R 14 and W 2 may bond together to form a C 3 -C 6 ring which may be substituted with fluorine or have an ether radical within the ring, r is 0 or 1, s is 1 or 2, v is 1 or 2, w is an integer of 0 to 4, a, b1, b2, c1, c2 and e are numbers in the range: 0<a<1.0, 0≦b1<1.0, 0≦b2<1.0, 0<b1+b2<1.0, 0≦c1<1.0, 0≦c2<1.0, 0<c1+c2<1.0, 0<e≦0.9 wherein e is a molar fraction of units E, and a+b1+b2+c1+c2+e=1.0.