TAIYO HOLDINGS CO., LTD.
|TAIYO HOLDINGS CO., LTD. Patent applications|
|Patent application number||Title||Published|
|20130048357||PHOTOSENSITIVE RESIN COMPOSITION, CURED PRODUCT THEREOF, AND PRINTED WIRING BOARD - Disclosed is a photosensitive resin composition which has excellent concealing properties for appearance defects of a circuit and the like, while having excellent coloring power and resolution that enable the formation of a high-resolution solder resist layer. Specifically disclosed is a photosensitive resin composition which contains a perylene coloring agent, a coloring agent that is in a complementary color relation with the perylene coloring agent, a carboxyl group-containing resin, a compound that contains two or more ethylenically unsaturated groups in each molecule, and a photopolymerization initiator.||02-28-2013|
|20120308838||PHOTOCURABLE RESIN COMPOSITION, DRY FILM, CURED ARTICLE AND PRINTED WIRING BOARD - Disclosed are: a photocurable resin composition which may be developed with an alkali, has excellent resolution properties, and enables a cured article having excellent (humidity) heat resistance and thermal impact resistance to be formed; a dry film; a cured article thereof; and a printed wiring board using the cured article. The photocurable resin composition of the present invention is characterized by containing a carboxyl group-containing resin, a photopolymerization initiator, and surface-treated Neuburg siliceous earth particles.||12-06-2012|
|20120301825||LAYERED STRUCTURE AND PHOTOSENSITIVE DRY FILM TO BE USED THEREFOR - In a layered structure having at least a substrate and a photosensitive resin layer or cured film layer formed on the substrate and containing an inorganic filler, the content of the inorganic filler in the photosensitive resin layer or cured film layer is lower in a surface layer region away from the substrate than in other region, so that a linear thermal expansion coefficient of the layer as a whole is maintained as low as possible. Preferably, the photosensitive resin layer or cured film layer comprises at least two layers having different inorganic filler contents, wherein the inorganic filler content in the layer on the surface side away from the substrate is lower than the inorganic filler content in the other layer. A photosensitive dry film containing the photosensitive resin layer is suitable for use as a solder resist or an interlayer resin insulation layer of a printed wiring board.||11-29-2012|
|20120301824||LAYERED STRUCTURE AND PHOTOSENSITIVE DRY FILM TO BE USED THEREFOR - In a layered structure having at least a substrate and a photosensitive resin layer or cured film layer formed on the substrate and containing an inorganic filler, the content of the inorganic filler in the photosensitive resin layer or cured film layer is low on the side contacting the substrate and high on the surface side away from the substrate, so that a linear thermal expansion coefficient of the photosensitive resin layer or cured film layer as a whole is maintained as low as possible. Preferably, the inorganic filler content in the layer gradually increases continuously obliquely or stepwise from the side contacting the substrate to the surface side away from the substrate. A photosensitive dry film containing the above-mentioned photosensitive resin layer is suitable for use as a solder resist or an interlayer resin insulation layer of a printed wiring board.||11-29-2012|
|20120250268||PHOTOSENSITIVE RESIN COMPOSITION, DRY FILM THEREOF, AND PRINTED WIRING BOARD USING THEM - An alkali-developable photosensitive resin composition comprises a carboxyl group-containing urethane resin having a biphenyl novolak structure, a photopolymerization initiator, and aluminum hydroxide and/or a phosphorus-containing compound. The composition may be formulated as a photocurable and thermosetting resin composition by further incorporating therein a thermosetting component having a plurality of cyclic ether groups and/or cyclic thioether groups in the molecule, besides the components described above. The photosensitive resin composition may further contain a colorant. By using the photosensitive resin composition or a dry film thereof, a printed wiring board having a flame-retardant cured film, such as a solder resist, formed from the halogen-free composition can be provided while imposing little burden on the environment, the cured film being flame-retardant and reduced in warpage and having various excellent properties including bending characteristics, resistance to soldering heat, and resistance to gold plating.||10-04-2012|
|20120168215||CURABLE RESIN COMPOSITION - Provided is a curable resin composition which exhibits improved developability even in through holes and can suppress the generation of development residue and which can yield a cured product with excellent heat resistance and hardness. A curable resin composition which comprises a carboxyl-containing resin, a photopolymerization initiator, and barium sulfate that has been pretreated with a dispersant having an acid group and/or a dispersant having a block copolymer structure, a graft polymer structure, and/or a star polymer structure.||07-05-2012|
|20120125672||PHOTOCURABLE RESIN COMPOSITION - Provided is a photocurable resin composition, which has sensitivity equal to or greater than existing compositions, has alkali development properties, and which produces a cured product that does not become brittle with changes in temperature, and which also has excellent reliability in terms of water resistance, electrical insulating properties, PCT resistance, and the like. The photocurable resin composition comprises a carboxyl group-containing resin, a photopolymerization initiator, a vinyl group-containing elastomer, and a styryl group-containing compound.||05-24-2012|
|20120111620||PHOTOCURABLE RESIN COMPOSITION - Disclosed is a photocurable resin composition which comprises a photopolymerization initiator having two oxime ester groups in the molecule, a resin containing a carboxyl group, and a compound having two or more ethylenically unsaturated groups in the molecule. The composition can achieve high sensitivity, can provide a dried coating film having excellent touch dryness of fingers, can prevent the generation of an out gas during curing or the like, and can achieve all of excellent alignment accuracy, high productivity and high reliability in the formation of a solder resist for a printed wiring board or the like.||05-10-2012|
|20120061128||PHOTOSENSITIVE RESIN, CURABLE RESIN COMPOSITION CONTAINING THE SAME, DRY FILM THEREOF, AND PRINTED CIRCUIT BOARD USING THEM - A carboxyl group-containing photosensitive resin is obtained by reacting an α,β-ethylenically unsaturated group-containing monocarboxylic acid (c) with a phenolic compound (a) containing the structure represented by the following general formula (I) and having at least two phenolic hydroxyl groups in its molecule, wherein part or the whole of the phenolic hydroxyl groups being modified into an oxyalkyl group, and further reacting a polybasic acid anhydride (d) with the resultant reaction product;||03-15-2012|
|20110278053||DRY FILM AND MULTILAYER PRINTED WIRING BOARD - A dry film includes a supporting base film and a thin membrane of a thermosetting resin composition. The thin membrane of the thermosetting resin composition is formed on the supporting base film. The thermosetting resin composition includes a liquid epoxy resin, a solid epoxy resin, a semisolid epoxy resin, an epoxy curing agent and a filler. The liquid epoxy resin is liquid at 20° C. and has at least two epoxy groups in a molecule. The solid epoxy resin is solid at 40° C. and has at least three epoxy groups in a molecule. The semisolid epoxy resin is solid at 20° C. and liquid at 40° C. and has at least two epoxy groups in a molecule. A ratio of mass of the liquid epoxy resin to a sum of mass of the solid epoxy resin and mass of the semisolid epoxy resin is about 1:1 to about 1:10 A ratio of the mass of the solid epoxy resin to the mass of the semisolid epoxy resin is about 1:0.5 to about 1:2.||11-17-2011|
|20110149541||HEAT CURABLE ADHESIVE AND RESIN LAMINATED-TYPE IC CARD - Provided is a heat curable adhesive that can strongly bond a base material formed of a crystalline polyester resin, can freely regulate the thickness of an adhesive layer, has excellent chemical resistance, and, at the same time, has excellent storage stability. Furthermore, provided is a resin laminated-type IC card, in which a liquid heat curable adhesive of which use has been difficult in the past can be used, and the liquid heat curable adhesive can be coated with a good accuracy by a printing method without the need to perform molding into a hot-melt sheet to bond a base material formed of a crystalline polyester resin. Accordingly, the resin laminated-type IC card can have a high degree of freedom in design of the thickness of an IC card. The heat curable adhesive comprises (a) a hydroxyl group-containing non-crystalline polyester resin, (b) a resin containing a carboxylic acid anhydride, and (c) a solvent for dissolving (a) the hydroxyl group-containing non-crystalline polyester resin.||06-23-2011|
Patent applications by TAIYO HOLDINGS CO., LTD.