Patent ID: 8252503

Claim:
A photoresist composition comprising a mixture of photoacid generators and a polymer comprising, (i) recurring units of structure (1) and (2) where each of R 61 , R 62 , R 63 , are individually selected from hydrogen or C 1-4 alkyl; and R 64 is C 1-4 alkyl; and (ii) one additional recurring unit of structure (10) where each R 61 , R 62 , and R 63 , are individually selected from hydrogen or C 1-4 alkyl, further where the mixture of photoacid generators comprises at least one of a compound of formula where R 1A , R 1B , R 2A , R 2B , R 3A , R 3B , R 4A , R 4B , R 5A , and R 5B are each independently selected from hydrogen, straight alkyl chain and branched alkyl chain, R 500 is selected from unsubstituted C 1-8 perfluoroalkyl and substituted C 1-8 perfluoroalkyl; at least one of a compound of formula where R 1A , R 2A , R 3A , R 4A , and R 5A , are each independently selected from hydrogen, straight alkyl chain and branched alkyl chain, R 6 and R 7 are each independently selected from aryl and aralkyl, R 500 is a selected from unsubstituted C 1-8 perfluoroalkyl and substituted C 1-8 perfluoroalkyl; and, at least one of a compound selected from the formula where R 1A , R 1B , R 2A , R 2B , R 3A , R 3B , R 4A , R 4B , R 5A , and R 5B are each independently selected from hydrogen, straight alkyl chain and branched alkyl chain, where Xi is selected from (Rf 1 SO 2 ) 2 N − , where Rf 1 is selected from perfluorinated alkyl and perfluorinated cycloalkyl, further where the composition comprises at least one base selected from substituted or unsubstituted anilines and at least one base selected from substituted or unsubstituted piperidines and substituted or unsubstituted mono- or diethanolamine.