Abstract:
PROBLEM TO BE SOLVED: To provide a structure of connecting a board, which can provide electrodes with a fine pitch and can achieve both an insulating property and connection reliability. SOLUTION: The structure of connecting printed wiring boards 10 and 20 electrically connects a plurality of first electrodes 12, 13, which are provided to be adjacent to each other on a first board 11, to a plurality of second electrodes 22, 23, which are provided to be adjacent to each other on a second board 21, through an adhesive 30 that contains conductive particles 31 and has anisotropic conductivity. By heating and pressurizing the adhesive placed between the mutually facing first electrode 12 and second electrode 22 and between the mutually facing first electrode 13 and second electrode 23, an adhesive layer 30a is formed between the first board 11 and the second board 21, and in the adhesive layer 30a, a cavity portion 33 is formed between the first electrodes 12, 13 and between the second electrodes 22, 23. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a film adhesive which can be easily mixed and has excellent flexibility to improve adhesive power. SOLUTION: The film adhesive contains a bisphenol A type phenoxy resin having a molecular weight of ≥30,000, an epoxy resin having a molecular weight of ≤500, a glycidyl methacrylate copolymer, a rubber-modified epoxy resin and a latent curing agent as necessary components. The epoxy equivalent of the glycidyl methacrylate copolymer is preferably ≤1,000. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
A method for the treatment of micro pores within a mica paper that includes: obtaining a silane with a molecular weight of between approximately 15 and 300, adding the silane to the mica paper, and reacting the silane with the inner surface of the micro pores within the mica paper. After this, a resin is impregnated into the mica paper, and the resin binds to the inner surfaces of the micro pores with the mica paper through the silane. In one embodiment, the mica paper is compressed by an amount between 5% and 30% of its original thickness. In another embodiment, the mica paper is compressed both prior to reacting the silane and during impregnation with the resin.
Abstract:
PROBLEM TO BE SOLVED: To provide a circuit board which can suppress delamination of an insulation layer. SOLUTION: The circuit board 100 comprises a substrate 1, first interconnection layer 2, the insulation layer 3, filling material 4, second interconnection layer 5, and via-hole 6. The first interconnection layer 2 is formed on the substrate 1. The insulation layer 3 is filled with the filling material 4 having a good thermal conductivity, and is so formed as to cover the substrate 1 (or the first interconnection layer 2). The first interconnection layer 2 and the second interconnection layer 5 are electrically insulated from each other by the insulation layer 3. At the bottom of the insulation layer 3, the filling material 4 embedded in the insulation layer 3 on the top face side of the substrate 1 (or the first interconnection layer 2) is exposed and the substrate 1 (or the first interconnection layer 2) is in direct contact with part of the filling material 4. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a metal powder which is used as an electroconductivity-imparting material and enhances an electroconductive effect by a small amount of addition. SOLUTION: The linked metal powder is made from nickel or an alloy thereof, forms one piece of combined particles, has the average diameter of the piece of 30 nm to 200 nm, and has the average length of 0.5 μm to 50 μm. The metal powder preferably has such a relation between an oxygen content therein and a specific surface area by the BET method as to satisfy 0.17≤x/s≤0.83 (wherein x is the oxygen content (wt.%); and s is the specific surface area (m 2 /g)), because such a metal powder acquires superior wettability with a resin and does not lower the electroconductivity. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide coated glass fiber strands having a peculiar coating, inhibiting abrasive wear and breakage of the fiber in treating and having an excellent wet-through, wet-out properties and dispersibility, excellent strength of a laminate eliminating heat-cleaning process prior to lamination process, excellent heat stability, resistance to hydrolysis, corrosion resistance and low reactivity in the presence of reactive acids and alkalis in high humidity and compatibility with polymeric matrix materials, during composite material forming process. SOLUTION: The present invention provides the coated fiber strand comprising a plurality of glass fibers having an average nominal fiber diameter greater than 5 micrometers, the strand being at least partially impregnated with a dried residue of an aqueous sizing composition comprising solid particles which provide interstitial spaces between adjacent glass fibers of the strand, the solid particles having a minimum average particle size of at least 3 micrometers and a hardness which does not exceed a hardness of the plurality of glass fibers. COPYRIGHT: (C)2004,JPO