Patent ID: 7351521

Claim:
A process for imaging a photoresist composition comprising the steps of: a) forming on a substrate a photoresist coating from a photoresist composition; b) image-wise exposing the photoresist coating; c) postexposure baking the photoresist coating; and d) developing the photoresist coating with an aqueous alkaline solution; and, where the photoresist composition comprises a photoacid generator and a fluorinated polymer, where the fluorinated polymer is a reaction product of polymer containing an aliphatic monocyclic fluoroalcohol unit with at least one compound capable of functionalizing the fluoroalcohol unit with an alkyloxycarbonylalkyl group of structure—(CR 3 R 4 )p(CO)OR 5, where R 3 and R 4 are independently H, F, (C 1 -C 8 )alkyl, (C 1 -C 8 )fluoroalkyl, cycloalkyl, cyclofluoroalkyl, (CR 3 R 4 )p(CO)OR 5, R 3 and R 4 may combine to form an alkyispirocyclic or a fluoroalkylspirocyclic group, R 5 is H or an acid labile group, and p=1-4 further where the polymer containing the monocyclic fluoroalcohol unit is selected from at least one of structures I to VIII, where Rf is a fluoroalkyl group (C 1 -C 8 ), Ra, Rb, Rc, Re, Rg and Rh are independently alkyl and fluoroalkyl, and Ra-Re and Rg can independently be substituted with alkyl, fluoroalkyl, spirofluoroalkyl or spiroalkyl substituent, where at least one of Ra, Rb, Rc and Rd is a fluoroalkyl group, Y is independently alkyl or fluoroalkyl spacer group (C 1 -C 8 ), and X is independently CF 2 or O.