Patent ID: 6517980
Filing Date: 2003-02-11
Classification: G03F

Abstract:
A color filter comprising: a transparent substrate; a colored layer provided on the transparent substrate; and a protective layer provided so as to cover the colored layer,said protective layer having been formed by coating a photosensitive resin composition comprising: an alkali-developable photocurable copolymer resin; an epoxy-containing copolymer resin; a bifunctional or higher polyfunctional photopolymerizable acrylate monomer; and an initiator added in an amount sufficient for photocuring to proceed that is a radical polymerization initiator or a photo-induced acid generator, said alkali-developable photocurable copolymer resin comprising 5 to 55% by mole of constituent units represented by formula (1) and 5 to 95% by mole of constituent units represented by formula (2), the constituent units represented by formula (1) having been partially reacted, through carboxyl groups thereof, with a (meth)acryloylalkyl isocyanate compound, the constituent units represented by formula (2) having been partially reacted, through hydroxyl groups thereof, with (meth)acryloylalkyl isocyanate compound, said copolymer resin containing 5 to 95% by mole of (meth)acryloyl groups and having an acid value of 5 to 400 mg KOH/g and a weight average molecular weight of 5,000 to 1,000,000 as determined using polystyrene as a standard, said epoxy-containing copolymer resin comprising 0 to 55% by mole of constituent units represented by formula (1), 5 to 95% by mole of constituent units represented for formula (2), and 5 to 95% by mole of constituent units represented by formula (3), the constituent units represented by formula (1) having been partially reacted, through carboxyl groups thereof, with a (meth)acryloylalkyl isocyanate compound, the constituent units represented by formula (2) having been partially reacted, through hydroxyl groups thereof, with a (meth)acryloylalkyl isocyanate compound, said copolymer resin containing 5 to 95% by mole of (meth)acryloyl groups and having an acid value of 0 to 400 mg KOH/g â€ƒand a weight average molecular weight of 5,000 to 1,000,000 as determined using polystyrene as a standard: wherein R represents hydrogen or an alkyl group having 1 to 5 carbon atoms; R1 represents an alkylene group having 2 to 4 carbon atoms; R2 represents an alkylene group having 1 to 4 carbon atoms; Z represents a 1,2-epoxy, 1,3-epoxy, or 1,4-epoxy group; and a, b, and c are integers corresponding respectively to contents in terms of % by mole of the constituent units, exposing the coating, developing the exposed coating with an alkali, and heating the developed coating.