摘要:
Disclosed is a carboxyl group-containing resin which is obtained by reacting a monocarboxylic acid (b) with epoxy groups of a resin (a), which has two or more epoxy groups in a molecule, in an amount of 0.3-0.85 mole per equivalent of the epoxy group in the resin (a), then reacting a polybasic acid (d) with epoxy groups of the thus-obtained reaction product (c) in an amount of 0.15-0.95 mole per equivalent of the epoxy group in the reaction product (c), and then further reacting a monocarboxylic acid (f) with epoxy groups of the thus-obtained reaction product (e) in an amount of 1.0-5.0 moles per equivalent of the epoxy group in the reaction product (f). The thus-obtained carboxyl group-containing resin has an acid value of 20-200 mgKOH/g, and is soluble in organic solvents.
摘要:
A liquid solder resist composition contains a carboxyl group-containing resin, a photopolymerizable compound containing at least one compound selected from a group consisting of a photopolymerizable monomer and a photopolymerizable prepolymer, a photopolymerization initiator, and a titanium dioxide. The photopolymerization initiator contains a bisacylphosphine oxide-based photopolymerization initiator, a first ±-hydroxyalkyl phenone-based photopolymerization initiator that is a liquid at 25°C, and a second ±-hydroxyalkyl phenone-based photopolymerization initiator that is a solid at 25°C.
摘要:
A carboxyl resin according to the present invention is obtained by a process including following steps: epoxy groups on a resin (a) having two or more epoxy groups in one molecule is made to react with 0.3-0.85 mol of a monocarboxylic acid (b) per one epoxy-group equivalent weight to obtain a reaction product (c); the epoxy group or groups on the reaction product (c) are made to react with 0.15-0.95 mol of a polybasic acid (d) per one epoxy-group equivalent weight to obtain a reaction product (e); and the epoxy group or groups on the reaction product (e) are further made to react with 1.0-5.0 mol of a monocarboxylic acid (f) per one epoxy-group equivalent weight. The carboxyl resin thus obtained has an acid value within a range from 20 to 200 mgKOH/g and is soluble in an organic solvent.
摘要:
A solder resist composition includes: a carboxyl group-containing resin; a photopolymerizable compound; a photopolymerization initiator containing a bisacylphosphine oxide-based photopolymerization initiator and an α-hydroxy allcylphenone-based photopolymerization initiator; and a phosphorescent dye. The bisacylphosphine oxide-based photopolymerization initiator contains bis-(2,4,6-trimethylbenzoyl)-phenylphosphine oxide. The α-hydroxy alkylphenone-based photopolymerization initiator contains 2-hydroxy-2-methyl-1-phenyl-propane-1-one. A mass ratio of the bis-(2,4,6-trimethylbenzoyl)-phenylphosphine oxide to the 2-hydroxy-2-methyl-1-phenyl-propane-1-one is 2:1 to 1:10.
摘要:
The objective of the present invention is to propose a carboxyl-containing resin which is less likely to gel and can form a solder mask layer with high electrical insulation reliability. The carboxyl-containing resin in accordance with the present invention has a structure resulting from addition of a carboxylic acid to at least one of epoxy groups of a biphenyl novolac epoxy resin. The carboxylic acid includes at least a polybasic acid.
摘要:
The present invention provides a resin composition for resist to be efficiently formed into a cured product with high properties of crack resistance, bulge resistance, protrusion resistance, and the like for filling a through-hole, a via hole, or the like with the cured product. The resin composition for masks in accordance with the present invention contains a first resin and a second resin. The first resin is prepared by an addition reaction of polybasic acid anhydride with an adduct of an ethylenically unsaturated compound having a carboxyl group and bifunctional epoxy resin. The second resin having: a group obtained by an addition reaction of an epoxy group with monocarboxylic acid; and a group obtained by addition reaction of an epoxy group with polybasic acid.