Patent ID: 7674567
Filing Date: 2010-03-09
Classification: G03F,Y10S

Abstract:
1. A positive resist composition comprising: (A1) at least one compound selected from a compound capable of generating an acid represented by the following formula (I) upon irradiation with actinic rays or radiation and a compound capable of generating an acid represented by the following formula (II) upon irradiation with actinic rays or radiation; (A2) a compound capable of generating an acid represented by the following formula (III) upon irradiation with actinic rays or radiation; and (B) a resin capable of decomposing under the action of an acid to increase its solubility in an alkali developer: wherein Rc wherein Ra A represents a divalent or trivalent linking group selected from an oxygen atom, a sulfur atom, a nitrogen atom, a carbonyl group, a sulfonyl group, an ester group, an amide group, a sulfonamide group, an imino group, a urethane group, a urea group and a group formed by combining two or more thereof, Rc n1 represents 1 or 2, n2 represents an integer of from 1 to 3, n3 represents 0 or 1, and n4 represents an integer of from 1 to 3.