Patent ID: 8632948

Claim:
A photoimageable antireflective coating composition capable of forming a pattern by development in an aqueous alkaline solution, comprising, (i) a polymer A soluble in a coating solvent and comprises a chromophore, a fluorinated group, and a crosslinking moiety, where polymer A is selected from a group consisting of; a) polymer A further comprising a repeat unit, where R 1 to R 3 are independently H-or C 1 -C 4 alkyl, d>0, X is a single valence bond or the linking group selected from the group consisting of alkyl, oxygen, carboxyl and mixtures thereof, L is an acid labile group, further where polymer A comprises repeat units derived from 4-hydroxyphenyl (meth)acrylate copolymerized with 3,5-bis(hexafluoro-2-hydroxy-2-propyl)cyclohexyl methacrylate; b) polymer A comprising repeat units derived from 9-anthracenylmethyl methacrylate,1-methyl-[4,4,4-trifluroro-3-hydroxy-3(trifluoromethyl)butyl] methacrylate and 4-hydroxyphenyl (meth)acrylate; and, c) polymer A comprising repeat units derived from 3,5-bis(hexafluoro-2-hydroxy-2-propyl)cyclohexyl methacrylate and repeat units derived from 4-hydroxyphenyl (meth)acrylate and pentafluoropropyl(meth)acrylate; (ii) at least one photoacid generator; (iii) a crosslinking agent; (iv) optionally, a thermal acid generator; (v) a polymer B which is soluble in an aqueous alkaline solution prior to development, where polymer B is non-miscible with polymer A and soluble in the coating solvent, and; (vi) a coating solvent composition, and (vii) optionally, a quencher.