Patent ID: 8945810
Filing Date: 2015-02-03
Classification: G03F,Y10S

Abstract:
1. A positive resist composition comprising: (A) a resin that has a repeating unit represented by general formula (a1) and increases its solubility in an alkali developer by action of an acid; (B) a compound which generates an acid upon irradiation with an actinic ray or a radiation; (C) a hydrophobic resin that has at least one of a fluorine atom and a silicon atom and has a group selected from the group consisting of (x), (y) and (z); and (D) a solvent: (x) an alkali-soluble group; (y) a group capable of decomposing by action of an alkali developer to undergo an increase in a solubility of the resin (C) in an alkali developer; and (z) a group that decomposes by action of an acid, wherein R represents a hydrogen atom or a methyl group, Rxa represents an alkyl group or a cycloalkyl group, and n represents an integer of 1 to 8; the weight average molecular weight of the resin (C) is from 2,000 to 15,000; the amount of the resin (C) is from 0.1 to 5% by weight based on the weight of the total solid components of the composition; and the resin (A) contains a monocyclic lactone structure.