Patent ID: 8795942
Filing Date: 2014-08-05
Classification: G03F

Abstract:
1. A positive resist composition at least comprising: (A) a resin component comprising a repeating unit (1′) selected from the following formulae: and one or more repeating units selected from the following general formulae (12), (13), (14), and (15), with the proviso that a+b+c+d+e=1, 0<a≦0.8, 0≦b≦0.6, 0≦c≦0.8, 0≦d≦0.6, 0≦e≦0.6, in the case of defining the ratio of the repeating unit represented by formula (1′) as a; the ratio of the repeating unit represented by formula (12) as b; the ratio of the repeating unit represented by formula (13) as c; the ratio of the repeating unit represented by formula (14) as d; and the ratio of the repeating unit represented by formula (15) as e; wherein R R (B) a photoacid generator generating sulfonic acid represented by the following general formula (8) upon exposure to a high energy beam; and (C) an onium salt where a cation is sulfonium represented by the following general formula (3), or ammonium represented by the following general formula (4); and an anion is represented by any one of the following general formulae (5) to (7), wherein R wherein R R wherein R wherein R wherein R