Patent ID: 7205090

Claim:
A chemical amplification type positive resist composition comprising (A) a resin which comprises (i) 5 to 50% by mol, based on total structural units in the resin, of a structural unit of the formula (I) wherein R 1 represents a hydrogen or a methyl, R 2 represents R 10 represents a halogen, a hydroxyl, an alkyl or an alkoxy, n represents an integer of 0 to 3, and when n is 2 or 3, each of R 10 the same or different, (ii) 5 to 50% by mol, based on total of structural units in the resin, of a structural unit of the formula (II) wherein R 102 represents a hydrogen or a methyl, R 11 represents an alkyl or an alkoxy, m represents an integer of 0 to 3, and when m is 2 or 3, each of R 11 is the same or different, and (iii) 5 to 50% by mol, based on total of structural units in the resin, of at least one selected from the group consisting of structural units of the formulas (III) and (IV) wherein R 103 and R 104 each independently represents a hydrogen or a methyl, R 3 and R 4 each independently represents an alkyl, R 12 and R 13 each independently represents an alkyl or an alkoxy, p and q each independently represents an integer of 0 to 3, when p is 2 or 3, each of R 12 is the same or different, and when q is 2 or 3, each of R 13 is the same or different, and (B) an acid generator.