| abstract |
(57) [Summary] (Modified) [Structure] An ultraviolet curable resin obtained by reacting a reaction product of a compound of formula (1) with an unsaturated monocarboxylic acid with a saturated or unsaturated polybasic acid anhydride, A liquid resist ink composition which comprises a photopolymerization initiator, a diluent and a thermosetting epoxy compound and which can be developed with a dilute aqueous alkali solution. [Effect] Excellent in electrical properties such as resolution, solvent resistance, plating resistance, and electrolytic corrosion resistance, flexibility and substrate adhesion, and particularly excellent heat resistance and good pattern formation even at low exposure dose. It is possible to do. [R is an organic compound residue having k active hydrogens, n 1 , n 2 ยทยทยท n k is 0 or an integer of 1 to 50, and the sum is 1 to 50. (R 'is a hydrogen atom, an alkyl group, an alkylcarbonyl group or an arylcarbonyl group). ] |