Patent ID: 6344307
Filing Date: 2002-02-05
Classification: C08F,G03F

Abstract:
A photosensitive resin composition comprising(A) A resin having at least one aprotic onium salt represented by the general formula (1) and the (general formula (2): â€”COOâˆ’Â·W+â€ƒâ€ƒ(1) wherein W+ represents wherein, Z represents a nitrogen atom or phosphorus atom, Y represents a sulfur atom; R1, R2, R3 and R4 are the same or different and each represents an organic group having 1 to 30 carbon atoms: R1 and R2 or R1, R2 and R3 may combine to form a heterocyclic ring together with the nitrogen atom, the phosphorus atom or the sulfur atom to which they are bound; and any one of R1 to R4 may be a group represented by the general formula: wherein R5 is a hydrocarbon group having 1 to 28 carbon atoms which may optionally be substituted by a hydroxyl group, an alkoxy group, an ester group or a halogen atom or a hydrogen atom, (B) a compound having two or more vinylether groups in a molecule, and (C) a compound which generates an acid upon irradiation with actinic energy rays, the aprotic onium salt-containing resin (A) being obtainable by introducing the aprotic onium salt to a carboxyl group-containing resin, a hydroxyphenyl group-containing resin or a carboxyl group and hydroxyphenyl group-containing resin by reacting any one of the carboxyl group-containing resin, the hydroxyphenyl group-containing resin or the carboxyl group and hydroxyphenyl group-containing resin with a tertiary amine, phosphine or thioether and an epoxy compound simultaneously, or the aprotic onium salt-containing resin (A) being obtainable by reacting an organic carboxylic acid with a tertiary amine, phosphine or thioether and an epoxy compound simultaneously to give an onium salt consisting of W+ cation and aâ€”COOâˆ’ anion; passing the obtained onium salt through an anion exchange resin to exchange the anion with a hydroxyl anion to give an aprotic onium salt compound represented by the general formula: HOâˆ’Â·W+â€ƒâ€ƒ(5) wherein W+ is as defined above; and mixing the obtained aprotic onium salt compound with a carboxyl group-containing resin, a hydroxyphenyl group-containing resin or a carboxyl group and hydroxyphenyl group-containing resin.