Patent ID: 8241829

Claim:
A resist polymer comprising, as a structural unit, an acid-decomposable unit having a structure represented by formula (2): wherein K 1 and K 2 each independently represent at least one selected from the group consisting of alkylene, cycloalkylene, oxyalkylene, arylene, a divalent thiazoline ring, a divalent oxazoline ring and a divalent imidazoline ring; L 1 and L 2 each independently represent at least one selected from the group consisting of —C(O)O—, —C(O)— and —OC(O)—; M 1 , M 2 and M 3 each independently represent at least one selected from the group consisting of alkylene, cycloalkylene, oxyalkylene and arylene; Y 1 and Y 2 each independently represent an acid-decomposable linkage; k1, k2, l1, l2, m1, m2, m3 and n1 each represent the number of K 1 , K 2 , L 1 , L 2 , M 1 , M 2 , M 3 and Y 2 , respectively, and are each independently 0 or 1; R 1 represents a hydrogen atom or a methyl group; and S represents a sulfur atom.