Patent ID: 7232647

Claim:
A photosensitive resin composition for laser scanning exposure comprising (A) a binder polymer containing at least one of a (meth)acrylic acid and an alkyl ester of the (meth)acrylic acid as a constitutional monomer, (B) a photopolymerizable compound having at least one polymerizable ethylenically unsaturated group in the molecule, wherein the (B) component comprises a bisphenol A based (meth)acrylate compound as an essential component, and (C) a photopolymerization initiator, wherein said Component (C) comprises as essential components (C1) a hexaaryl bisimidazol compound, (C2) an aryl glycine based compound and (C5) a benzophenone compound having an alkylamino group or a coumarin compound, which satisfies the following formula (1): - 25 ≦ E 1 - E 0 E 0 × 100 ≦ 25 ( 1 ) wherein E 0 represents an exposure amount in mJ/cm 2 at which the photosensitive resin composition is cured at the 21st step of the density 1.00 of a 41-step step tablet having a density range from 0.00 to 2.00, a density step of 0.05, a tablet size of 20 mm×187 mm and a step size of 3 mm×12 mm, by irradiation with a full wavelength active light of a high pressure mercury lamp and B1 represents an exposure amount in mJ/cm 2 at which the photosensitive resin composition after being left for 2 hours under 40 W non-ultraviolet white lamp is cured at the 21st step of the 41-step step tablet by irradiation with a full wavelength active light from a high pressure mercury lamp.