Patent ID: 7927778
Filing Date: 2011-04-19
Classification: G03F

Abstract:
1. A chemically amplified positive photoresist composition for a thick film that is used for forming a thick-film photoresist layer with a film thickness of 10 to 150 μm on top of a support, consisting essentially of: (A) a compound that generates acid upon irradiation with active light or radiation; and (B) a resin that displays increased alkali solubility under action of acid; and (C) an alkali-soluble resin; wherein said component (B) comprises (b1) a resin containing a structural unit represented by a general formula (1) shown below, and (b2) a resin consisting of a structural unit represented by a general formula (2) shown below and a structural unit derived from phenoxypolyethylene glycol (meth)acrylate, methoxypolypropylene glycol (meth)acrylate or a compound represented by a general formula (10) shown below, and wherein said alkali-soluble resin (C) comprises at least one resin selected from the group consisting of (c1) novolak resins, (c2) copolymers containing a hydroxystyrene structural unit and a styrene structural unit, (c3) acrylic resins and (c4) vinyl resins (wherein, R1 represents a hydrogen atom or a methyl group, and R2 represents an acid-labile group) (wherein, R (wherein, R′ represents a hydrogen atom or a methyl group, R