Patent ID: 8703383

Claim:
A copolymer having the formula: wherein R 1 -R 5 are each independently H, C 1-6 alkyl, or C 4-6 aryl, R 6 is a fluorinated or non-fluorinated C 5-30 acid decomposable group; each Ar is independently a monocyclic, polycyclic, or fused polycyclic C 6-20 aryl group; each occurrence of R 7 is —OR 11 where R 11 is a fluorinated or non-fluorinated C 5-30 acid decomposable acetal group comprising a fluorinated or nonfluorinated C 6-25 aryl group; each occurrence of R 8 is independently —OR 11 or a —C(CF 3 ) 2 OR 11 group where each occurrence of R 11 is independently H or a fluorinated or non-fluorinated C 5-30 acid decomposable group; each occurrence of R 9 is independently F, C 1-10 fluoroalkyl, or a C 1-10 fluoroalkoxy group; R 10 is a cation-bound C 10-40 photoacid generator-containing group of the formula —(Ar″)—O—R 13 wherein Ar″ is a C 6-20 monocyclic, polycyclic, or fused polycyclic aryl group, and wherein R 14 is H or C 1-4 alkyl, and R 17 is wherein R 18 is H or a C 1-10 organic group, X is S or I, and h is 2 when X is S, or h is 1 when X is I, and k is 1 to 4, and Z − is an anion; or R 10 is wherein R 18 is H or a C 1-10 organic group, X is S or I, and h is 2 when X is S, or h is 1 when X is I, k is 1 to 4, and Z − is an anion; mole fraction a is 0 to 0.80; mole fraction b is greater than 0 and less than or equal to 0.80; mole fraction c is 0.01 to 0.80; mole fraction d is greater than zero and less than or equal to 0.80; and mole fraction e is greater than 0 and less than or equal to 0.50; the sum of the mole fractions a+b+c+d+e is 1; 1 and m are independently integers of 1 to 4; and n is an integer of 1 to 5.