Abstract:
Disclosed is a prepreg obtained by impregnating a woven fabric base with a thermosetting resin composition, wherein the thermosetting resin composition contains 80 to 200 volume parts of an inorganic filler per 100 volume parts of a thermosetting resin, and the inorganic filler contains (A) gibbsite aluminum hydroxide particles having an average particle diameter (D50) of 2 to 15 μm, (B) at least one inorganic component selected from the group consisting of boehmite particles having an average particle diameter (D50) of 2 to 15 μm and inorganic particles that have an average particle diameter (D50) of 2 to 15 μm and that contain crystal water having a release initiation temperature of 400° C. or higher or contain no crystal water, and (C) aluminum oxide particles having an average particle diameter (D50) of 1.5 μm or smaller, the compounded ratio (volume ratio) of the gibbsite aluminum hydroxide particles (A), the at least one inorganic component (B) selected from the group consisting of the boehmite particles and the inorganic particles, and the aluminum oxide particles (C) being 1:0.1 to 2.5:0.1 to 1.
Abstract:
The invention relates to a method of embedding a metal trace in a silicone containing polymer layer, by the steps of applying an agent that does not adhere to a substrate; applying a polymer layer on the non adhering agent; irradiating a surface of the polymer with a light beam emitted by an excimer laser creating cuts, grooves, blind holes or vias; immersing the irradiated polymer in an autocatalytic bath containing metal ions and metallizing the polymer; thermally treating the metallized polymer layer to induce diffusion of the metalized metal into the first polymer layer; applying a polymer layer on the thermally treated metallized polymer; and thermally treating the metallized polymer.
Abstract:
A metal-clad laminate of the present invention comprises an insulating layer, and a metal layer that is present at least on one surface side of the insulating layer. The insulating layer is a laminate of at least three layers: a center layer, a first resin layer that is present on one surface side of the center layer, and a second resin layer that is present on the other surface side of the center layer. The center layer, the first resin layer and the second resin layer each contain a cured product of a respective resin composition. The elastic modulus of the cured product of the resin composition contained in the center layer is lower than the elastic moduli of both the cured product of the resin composition contained in the first resin layer and the cured product of the resin composition contained in the second resin layer.
Abstract:
In one embodiment of the present invention, inert nano-sized particles having dimensions from 1 nm to 1,000 nm are added into a solder ball. The inert nano-sized particles may comprise metal oxides, metal nitrides, metal carbides, metal borides, etc. The inert nano-sized particles may be a single compound, or may be a metallic material having a coating of a different material. In another embodiment of the present invention, a small quantity of at least one elemental metal that forms stable high melting intermetallic compound with tin is added to a solder ball. The added at least one elemental metal forms precipitates of intermetallic compounds with tin, which are dispersed as fine particles in the solder.
Abstract:
Provided are a thermosetting adhesive composition excellent in storage stability, reliability, and low-temperature adhesion properties; and a curl-resistant heat-resistant film and a wiring film obtained using the composition. The thermosetting adhesive composition includes 100 parts by weight of a phenoxy resin having a bisphenol S skeleton in the structure thereof; 5 to 30 parts by weight of a maleimide compound containing a plurality of maleimide groups in the structure thereof; and 3 to 20 vol % of an inorganic needle-like filler. The heat resistant adhesive film is obtained by applying the thermosetting adhesive composition onto a polyimide film, followed by drying. The wiring film is obtained by placing a conductor wiring layer on the heat resistant adhesive film.
Abstract:
Systems and methods for screening applicants are disclosed herein. A method of screening applicants is performed by a screening server. The server begins by receiving a selection of screening services and an applicant profile that identifies an applicant. The screening continues by generating screening results specified by the selection of screening services based on the applicant profile. A property manager is then notified that the screening results are available for the applicant based upon the applicant profile. The screening results are then provided to the property manager based upon the applicant profile. Based on these screening results, the screener or property manager can make a decision about the applicant and communicate a decision action to the applicant.
Abstract:
The present invention provides a wiring board giving good heat dissipation over a long period of use. The present invention also provides a method for producing a wiring board, including coating a surface of a metal substrate, which is made of an aluminum plate, with a composition containing a substance having a polysiloxane structure and inorganic particles having insulating and heat-dissipating properties, curing the composition, then bonding a copper foil to the cured composition, and partially removing the copper foil, thereby forming a wiring layer.
Abstract:
A non-halogenated flame retardant filler having phosphorous-modified inorganic particles imparts flame retardancy to manufactured articles such as printed circuit boards (PCBs), connectors, and other articles of manufacture that employ thermosetting plastics or thermoplastics. Phosphorous-modified silica particles, for example, may serve both as a filler for rheology control (viscosity, flow, etc.) and a flame retardant. In an exemplary application, a PCB laminate stack-up includes conductive planes separated from each other by a dielectric material that includes a non-halogenated flame retardant filler comprised of phosphorous-modified silica particles. In an exemplary method of synthesizing phosphorous-modified silica particles, a vinyl-terminated phosphorous-based monomer (e.g., a phosphorous based flame retardant functionalized to contain a vinyl functional group) is reacted with vinyl functionalized silica particles (i.e., the silica particle surface is functionalized to contain a vinyl functional group). Alternatively, hydrosilated terminated silica particles may be reacted with a vinyl-terminated phosphorous-based monomer to produce phosphorous-modified silica particles.
Abstract:
A printed wiring board is formed by adhering a coverlay film having a resistance layer formed on a surface of the coverlay film body to a printed wiring board body having a conductive layer formed on a surface of a substrate through an adhesive layer. The resistance layer is separated from and opposed to the conductive layer through the adhesive layer.
Abstract:
A resin containing a conductive particle and a gas bubble generating agent is supplied in a space between the substrates each having a plurality of electrodes. The resin is then heated to melt the conductive particle contained in the resin and generate gas bubbles from the gas bubble generating agent. A step portion is formed on at least one of the substrates. In the process of heating the resin, the resin is pushed aside by the growing gas bubbles, and as a result of that, the conductive particle contained in the resin is led to a space between the electrodes, and a connector is formed in the space. At the same time, the resin is led to a space between parts of the substrates at which the step portion is formed, and cured to fix the distance between the substrates.