Patent ID: 6949325

Claim:
A negative resist composition comprising a polymer, the polymer comprising at least one fluorosulfonamide monomer unit having one of the following two formulae: wherein M is a polymerizable backbone moiety which is where R 3 is hydrogen, a linear or branched alkyl group of 1 to 20 carbons a semi- or perfluorinated linear or branched alkyl group of 1 to 20 carbons, or CN; Z is a linking moiety selected from the group consisting of —C(O)O—, —C(O)—, —OC(O)—, —O—C(O)—C(O)—O—, and alkyl; P is 0 or 1; R 1 is a linear or branched alkyl group of 1 to 20 carbons; R 2 is hydrogen, fluorine, a linear or branched alkyl group of 1 to 6 carbon or a semi- or perfluorinated linear or branched alkyl group of 1 to 6 carbons; and n is an integer from 1 to 6.