Patent ID: 7524604

Claim:
A positive resist composition, comprising a resin component (A) which contains acid dissociable, dissolution inhibiting groups, and exhibits increased alkali solubility under action of acid, and an acid generator component (B) that generates acid on exposure, wherein said resin component (A) is a polymer, comprising structural units (a1) represented by a general formula (I) shown below, wherein a portion of hydroxyl groups of said structural units (a1) are protected with said acid dissociable, dissolution inhibiting groups represented by a general formula (II) shown below (wherein, R represents a hydrogen atom or a methyl group) (wherein, R 1 represents an alkyl group of 1 to 5 carbon atoms, R 2 represents a hydrogen atom, X represents an adamantyl group, and the oxygen atom in the general formula (II) is bonded at the 1-position of the adamantyl group as X).