Patent ID: 7955780
Filing Date: 2011-06-07
Classification: C08F,G03F,Y10S

Abstract:
1. A positive resist composition, comprising: (A) a resin capable of increasing solubility in an alkaline developer under action of an acid, wherein the resin (A) has a recurring unit having a first group selected from the groups represented by any of the following formulas (pI) to (pV), a recurring unit having a second group selected from the groups represented by any of the following formulas (pI) to (pV) but different from the first group, and a structure represented by the following formula (1) in a polymer main chain; (B) a compound generating an acid upon irradiation with actinic rays or radiation; and (C) a solvent: in the formulas (pI) to (pV), Z represents an atomic group necessary to form a cycloalkyl group with the carbon atom; R R R in the formula (1), L represents, when m=1, a single bond or a divalent hydrocarbon group which may have a heteroatom and L represents, when m≧2, an m+1 valent hydrocarbon group which may have a heteroatom; R R n and k each independently stands for 0 or 1; and m stands for an integer of from 1 to 16.