Patent ID: 8372577
Filing Date: 2013-02-12
Classification: G03F

Abstract:
1. A photosensitive dry film prepared by applying to a support film a photosensitive resin composition, drying the applied composition to form a photosensitive resin layer and overlying the photosensitive resin layer with a protective film, wherein the photosensitive resin composition comprises (a) a binder polymer based on a copolymer containing benzyl (meth)acrylate as a building block, (b) a photopolymerizable compound having at least one polymerizable ethylenically unsaturated group in the molecule, (c) a photopolymerization initiator based on a hexarylbisimidazole compound and (d) a light-initiated color former, wherein: component (a) is a copolymer obtained from monomers selected from the group consisting of (meth)acrylic acid and benzyl (meth)acrylate, wherein the polymerization ratio of (meth)acrylic acid to benzyl (meth)acrylate ranges from 5:95 to 50:50, and component (b) is at least one compound selected from the group consisting of 2,2-bis[4-[(meth)acryloxypolyethoxy]lphenyl]propanes (the number of ethoxy groups: 2-14), triglycerol di(meth)acrylate and ethoxylated polypropylene glycol di(meth)acrylate.