Patent ID: 6432612
Filing Date: 2002-08-13
Classification: G03F,H05K

Abstract:
An ultraviolet-curable solder resist ink comprising:as a component (A), an ultraviolet-curable resin having at least two ethylenically unsaturated groups and a carboxyl group per one molecule thereof; as a component (B), an epoxy resin having at least two epoxy groups per one molecule thereof; as a component (C), one of a monocarboxylic acid selected from the group consisting of formic acid, acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, caprylic acid, capric acid, laurylic acid, myristic acid, palmitic acid, stearic acid, oleic acid, linolic acid, linolenic acid, cyclohexane carboxylic acid, phenylacetic acid, o-toluic acid, m-toluic acid, p-toluic acid, benzoic acid, o-chlorobenzoic acid, m-chlorobenzoic acid, p-chlorobenzoic acid, o-bromobenzoic acid, m-bromobenzoic acid, p-bromobenzoic acid, o-nitrobenzoic acid, m-nitrobenzoic acid, p-nitrobenzoic acid, p-hydroxybenzoic acid, o-methoxybenzoic acid, m-methoxybenzoic acid, p-methoxybenzoic acid, lactic acid, salicylic acid, and glycolic acid, a dicarboxylic acid selected from the group consisting of oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, sebacic acid, maleic acid, fumaric acid, itaconic acid, phthalic acid, isophthalic acid, terephthalic acid, hexahydrophthalic acid, 3-ethyl hexahydrophthalic acid, 4-ethyl hexahydrophthalic acid, tetrahydrophthalic acid, 4-ethyl tetrahydrophthalic acid, and crotonic acid, or a tricarboxylic acid selected from the group consisting of trimellitic acid and citric acid; as a component (D), a photo-polymerization initiator; and as a component (E), a diluent including an organic solvent.