Patent ID: 6143464
Filing Date: 2000-11-07
Classification: B41C,B41M

Abstract:
A positive-type photosensitive composition for use with an infrared laser, comprising a substance which generates heat upon absorbing light, a resin which has phenolic hydroxyl groups and is soluble in an aqueous alkaline solution, and a copolymer comprising 10 mol % or more of at least one of the following items (a) to (c) as a component for copolymerization: (a) a monomer having in the molecule a sulfonamide group having at least one hydrogen atom linked to the nitrogen atom; (b) a monomer having in the molecule an active imino group represented by the following formula: ##STR6## (c) an acrylamide, a methacrylamide, an acrylate, a methacrylate, or hydroxystyrene, each having a phenolic hydroxyl group;wherein the blending ratio by weight of said resin which has phenolic hydroxyl groups and is soluble in an aqueous alkaline solution to said copolymer is in the range of from 50:50 to 5:95. and wherein said composition is free of onium salts and quinone diazide compounds.