Patent application number | Description | Published |
20110229629 | METHOD FOR PRODUCING LIQUID CRYSTALLINE POLYESTER IMPREGNATED FIBER SHEET - A method for producing a liquid crystalline polyester impregnated fiber sheet, comprising a step of impregnating a fiber sheet composed of an aramid fiber or a polybenzazole fiber with a liquid composition containing a liquid crystalline polyester and an aprotic solvent free of a halogen atom and a step of removing the solvent from the fiber sheet impregnated with the liquid composition. As the above mentioned solvent, N,N-dimethylformamide, N,N-dimethylacetamide and N-methylpyrrolidone are preferably used. As the above mentioned sheet, textiles are preferably used. | 09-22-2011 |
20120006481 | METHOD FOR PRODUCING METAL FOIL LAMINATE - The present invention provides a method for producing a metal foil laminate, the method comprising sequentially interposing an insulating base material between a pair of metal foils and between a pair of metal plates, followed by heating and pressurizing to produce a metal foil laminate in which the pair of metal foils are attached on both sides of the insulating base material, wherein the ratio of an area of the insulating base material to that of each metal plate is from 0.75 to 0.95. According to the present invention, tight adhesion of a metal foil laminate is sufficiently increased even if the metal foil laminate has a large size. | 01-12-2012 |
20120107510 | Liquid Crystal Polyester Liquid Composition - The present invention aims at providing a liquid composition which contains a liquid crystal polyester, a solvent and an inorganic filler and which provides a liquid crystal polyester-impregnated fiber sheet that is less likely to cause a decrease in strength even when exposed to high humidity; according to a preferred embodiment, the liquid composition is prepared by mixing a liquid crystal polyester, a solvent, and a surface treated silica containing silica having a volume average particle diameter of from 0.1 to 1.5 μm, the surface of which is treated with a silane compound having at least one kind of group selected from the group consisting of a methacryloyloxy group, a phenyl group, a vinyl group and an epoxy group. | 05-03-2012 |
20120132362 | RESIN-IMPREGNATED SHEET AND METHOD FOR PRODUCING RESIN-IMPREGNATED SHEET LAMINATE WITH METAL FOIL - A resin-impregnated sheet obtained by impregnating a fiber sheet with a thermoplastic resin, wherein a weight loss rate upon a heat treatment at 225° C. for 30 minutes is from 6.8 to 10% by mass; and a method for producing a resin-impregnated sheet laminate with a metal foil, which comprises preliminarily pressing a plurality of the resin-impregnated sheets while being laid one upon another, subjecting the obtained resin-impregnated sheet laminate to a heat treatment, and arranging a metal foil on both sides of the sheet laminate, followed by regular pressing. | 05-31-2012 |
20120193129 | PROCESS FOR PRODUCING GLASS CLOTH SUBSTRATE AND PRINTED WIRING BOARD - The present invention provides a process for producing a glass cloth substrate including: an impregnating step of impregnating a surface-treated glass cloth with a liquid composition including a solvent and a polyester to obtain a liquid composition-impregnated glass cloth, and a substrate preparing step of removing the solvent from the liquid composition in the liquid composition-impregnated glass cloth to obtain a glass cloth substrate. According to the present invention, adherability between the liquid crystal polyester and the glass cloth is improved, and the heat resistance at moisture absorption of the glass cloth substrate is improved. | 08-02-2012 |
20120196043 | METHOD FOR PRODUCING HEAT-TREATED LIQUID CRYSTAL POLYESTER-IMPREGNATED BASE MATERIAL - An object of the present invention is to provide a method for producing a heat-treated liquid crystal polyester-impregnated base material, which can prevent welding to a supporting material upon a heat treatment. A second liquid crystal polyester-impregnated base material is obtained by heat-treating a first liquid crystal polyester-impregnated base material | 08-02-2012 |
20120196044 | METHOD FOR PRODUCING HEAT-TREATED LIQUID CRYSTAL POLYESTER-IMPREGNATED BASE MATERIAL - An object of the present invention is to provide a method for producing a heat-treated liquid crystal polyester-impregnated base material, in which the portion to be practically used as the liquid crystal polyester-impregnated base material after a heat treatment is not welded to the supporting member. In the step of heat-treating a first liquid crystal polyester-impregnated base material, the first liquid crystal polyester-impregnated base material is heat-treated while supporting by a supporting member in the site other than the portion to be practically used after the heat treatment to obtain a second liquid crystal polyester-impregnated base material. | 08-02-2012 |
20120279652 | METHOD FOR PRODUCING METALLIC FOIL LAMINATE BODY - Improved moisture absorption solder heat resistance is obtained in producing a metallic foil laminate body having a metal foil attached on both sides of a laminated base material including a plurality of insulating base materials. A laminated base material ( | 11-08-2012 |
20120285617 | METHOD FOR PRODUCING METAL FOIL LAMINATE - A method is provided for producing a metal foil laminate having a good appearance. In a suitable embodiment a first stack with a resin-impregnated base material sequentially sandwiched between a pair of copper foils and between a pair of spacer copper foils is prepared. Then, a second stack with the first stack sequentially sandwiched between a pair of SUS sheets and between a pair of aramid cushions is prepared. Thereafter, this second stack is hot pressed by a pair of heating plates in the laminating direction thereof to produce a metal foil laminate with a pair of copper foils attached onto both sides of the resin-impregnated base material. | 11-15-2012 |
20120305182 | METHOD FOR PRODUCING METAL FOIL LAMINATE - It is an object of the invention to provide a method for producing a metal foil laminate that can yield a metal foil laminate with a satisfactory outer appearance, while also improving the flatness of the metal foil laminate. As a preferred mode of the method, the method for producing a metal foil laminate comprising metal foils on both sides of an insulating base material, comprises a second stack-preparing step in which a second stack is prepared having a laminar structure wherein a first stack comprising an insulating base material sandwiched between a pair of first metal foils, a pair of first spacers, a pair of second spacers and a pair of first cushion materials in that order, is sandwiched between a pair of metal sheets and a pair of second cushion materials, in that order, and a second stack-hot pressing step in which the second stack is hot pressed with a pair of heating plates in the direction of lamination. | 12-06-2012 |
20120328872 | LAMINATE - A laminate including an insulating layer including one insulating base material or plural insulating base materials laid one upon another, the base material being obtained by impregnating a glass cloth having a thickness of 5 to 25 μm with a liquid crystal polyester; and a metal layer provided on one surface or both, surfaces of the insulating layer. | 12-27-2012 |
20130101824 | METHOD FOR PRODUCING LAMINATE, AND LAMINATE - The object of the present invention is to provide a laminate superior in dimensional stability, a method for the production thereof, and a circuit substrate using the laminate. There is disclosed a method for producing a laminate, the method including a first step of impregnating a fiber sheet with a liquid composition containing a liquid crystalline polyester and a solvent, and then removing the solvent contained in the fiber sheet to form a resin-impregnated sheet; a second step of stacking a plurality of the resin-impregnated sheets to form an insulative substrate, and then hot press treating the insulative substrate to form a laminated substrate; and a third step of heat treating the laminated substrate at a temperature within the range of from the glass transition temperature of the laminated substrate to the temperature of the glass transition temperature +150° C. | 04-25-2013 |