Abstract:
The electrical substrate material preferably comprises polytetrafluoroethylene filled with silica along with a small amount of microfiberglass. In an important feature of this invention, the ceramic filler (silica) is coated with a silane coating material.
Abstract:
@ The invention provides a flexible metal-foiled laminate of an insulating base film of a synthetic resin, e.g. polyimide, and a metal, e.g. copper, foil adhesively bonded together and suitable for use as a base plate for printed circuit boards by virtue of the high heat resistance and greatly increased adhesive bonding strength between the base film and the metal foil. The laminate is prepared by use of a silicone-based adhesive and the surface of the base film is, prior to adhesive bonding, subjected to a treatment of exposure to an atmosphere of low temperature plasma generated in a gaseous organosilicon compound such as trimethyl ethoxy silane, optionally, diluted with an inorganic gas such as oxygen..
Abstract:
Provided are an insulated ultrafine powder obtained by adding liquid metal alkoxide to a methanol-containing organic solvent in which a conductive ultrafine powder comprising a carbon material is dispersed and further adding water thereto and a method for producing the same. Also, provided are an insulated ultrafine powder obtained by adding liquid metal alkoxide to a methanol-containing organic solvent in which a conductive ultrafine powder comprising a carbon material is dispersed, further adding a coupling agent having an alkoxide group and then adding water thereto and a method for producing the same. Further, provided is a high dielectric constant resin composite material obtained by blending the insulated ultrafine powder of the present invention with a resin in a volume ratio (insulated ultrafine powder/resin) falling in a range of 5/95 to 50/50.
Abstract:
To provide a connection structure (10) including two conductors (21, 31) and a copper connection (11) electrically connecting the conductors. The connection (11) is made mainly of copper. The connection (11) has a plurality of voids. The connection (11) contains an organosilicon compound in the voids. The connection preferably has a microstructure including an aggregate of a plurality of particles that are fused and bonded to each other to form a neck therebetween. Preferably, the connection has a microstructure including a plurality of large-diameter copper particles having a relatively large diameter and small-diameter copper particles having a smaller diameter than the large-diameter copper particles, the large-diameter copper particles each being fused and bonded to the small-diameter copper particles, the small-diameter copper particles being fused and bonded to each other, and a plurality of the small-diameter copper particles being located around the large-diameter copper particle.
Abstract:
The present invention provides a resin composition including: nanoparticles (A) of alumina and/or boehmite having an average particle size of 1.0 nm to 100 nm; fine particles (B) having an average particle size of 0.20 µm to 100 µm; and a thermosetting resin (C), wherein the nanoparticles (A) have their surfaces treated with a polysiloxane-based modifier.
Abstract:
The method for making a hole (5) in a layer (4) comprises the provision of first and second adhesion areas (1a) and (1b) on a surface of a substrate (2). The first area (1a) has dimensions corresponding to the dimensions of the hole (5). The method comprises depositing a layer (4) on the first and second areas (1a) and (1b). The material of the layer (4) has an adhesion coefficient to the first area (1a) lower than the adhesion coefficient to the second area (1b). The part of the layer arranged above the first area (1a) is eliminated by a fluid jet (6).
Abstract:
Provided is a copper foil for a printed circuit board comprising a layer including nickel, zinc, a compound of nickel and that of zinc (hereinafter referred to a "nickel zinc layer") on a roughened surface of a copper foil, and a chromate film layer on the nickel zinc layer, wherein the zinc add-on weight per unit area of the nickel zinc layer is 180µg/dm 2 or more and 3500µg/dm 2 or less, and the nickel weight ratio in the nickel zinc layer {nickel add-on weight 1 (nickel add-on weight + zinc add-on weight)} is 0.38 or more and 0.7 or less. This surface treatment technology of a copper foil is able to effectively prevent the circuit corrosion phenomenon in cases of laminating a copper foil on a resin base material and using a sulfuric acid hydrogen peroxide etching solution to perform soft etching to the circuit.