Abstract:
A conductive member for a non-contact type data carrier such as a wireless tag is simply and cheaply manufactured. A method for manufacturing a conductive member for a non-contact type data carrier comprises: a printing process during which, while a base material (4) is run, a bonding agent layer (5) is printed in a predetermined pattern on the surface thereof, and is dried; a bonding process during which a conductive layer (6) is laminated on the surface of the bonding agent layer (5) for heating and bonding; a punching process during which the conductive layer (6) is punched in the above-described pattern on the base material (4); and a separating process during which an unnecessary portion (6b) of the conductive layer (6) is separated from the base material (4). Accordingly, a conventional multilayered laminated sheet is not required to realize reduction in the material.
Abstract:
A wiring board comprising a copper wiring, and an insulating layer which is a cured product of a resin composition containing a compound having a carbon-carbon unsaturated double bond as a cross-linking component, the wiring board having a surface-treated layer formed on one or both sides of the copper wiring, and the surface-treated layer having a metal layer (A) containing at least one metallic component selected from the group consisting of tin, zinc, nickel, chromium, cobalt and aluminium, an oxide and/or hydroxide layer (B) of the metallic component on the metal layer (A), an amino-silane coupling agent layer (C) having an amino group in its structure on the oxide and/or hydroxide layer (B), and a vinyl-silane coupling agent layer (D) having a carbon-carbon unsaturated double bond on the amino-silane coupling agent layer (C).
Abstract:
A method for producing the LED substrate has steps of: p providing a conductive metallic board, forming multiple grooves in a top of the conductive metallic board; protecting the conductive metallic board from corrosion, forming an etched substrate with circuits and wires for plating on the conductive metallic board, electroless plating the etched substrate to form an electroless plated substrate, plating metal on the electroless plated substrate, and coating solder mask to obtain the LED substrate. Because LED chips are mounted on the surfaces of the metal layer without insulating adhesive below, heat from LED chips can be dissipated efficiently. The LED substrate of the present invention can be soldered directly onto a dissipation module to further enhance dissipation efficiency.
Abstract:
A device mounting board includes an insulating resin layer, a wiring layer provided on one of main surfaces of the insulating resin layer, and bump electrodes connected electrically to the wiring layer and protruding on a side of the insulating resin layer from the wiring layer. A semiconductor module is formed by having the bump electrodes connected to a semiconductor device. A recess is provided in the top face of each bump electrode. The recess communicates with an opening provided on a side surface of the bump electrode.
Abstract:
In the silicon nitride substrate concerning an embodiment of the invention, degree of in-plane orientation fa of β type silicon nitride is 0.4-0.8. Here, degree of in-plane orientation fa can be determined by the rate of the diffracted X-ray intensity in each lattice plane orientation in β type silicon nitride. As a result of research by the inventors, it turned out that both high fracture toughness and high thermal conductivity are acquired, when degree of in-plane orientation fa was 0.4-0.8. Along the thickness direction, both the fracture toughness of 6.0 MPa·m1/2 or higher and the thermal conductivity of 90 W/m·K or higher can be attained.
Abstract:
A substrate for power electronics mounted thereon, comprises a middle ceramic layer having a lower surface and an upper surface, an upper metal layer attached to the upper surface of the middle ceramic layer, and a lower metal layer attached to the lower surface of the middle ceramic layer. The lower metal layer has a plurality of millichannels configured to deliver a coolant for cooling the power electronics, wherein the millichannels are formed on the lower metal layer prior to attachment to the lower surface of the middle ceramic layer. Methods for making a cooling device and an apparatus are also presented.
Abstract:
Provided are an antenna circuit constituent body for an IC card/tag, which is capable of enhancing a Q value by reducing a permittivity of a resin film of which a base material is made; and an IC card. The antenna circuit constituent body (10) for an IC card/tag comprises: the base material (11) made of the resin film; and circuit pattern layers (131 and 132) each formed on each of both sides of the base material (11) and made of aluminum foil. The circuit pattern layer (131) includes a coiled pattern layer. Parts of the circuit pattern layers (131 and 132), which mutually face each other; and a part of the base material (11), which is interposed between the parts of the circuit pattern layers (131 and 132), constitute a capacitor. The circuit pattern layers (131 and 132) are electrically connected by means of crimping parts (13a and 13b). The base material (11) includes a plurality of void-state-air layers. A relative density of the base material (11) with respect to a density of a resin is less than or equal to 0.9. An average volume of the void-state-air layers is greater than or equal to 2 μm3 and less than or equal to 90 μm3.
Abstract:
A circuit subassembly, comprising: a conductive layer, a dielectric layer formed from a thermosetting composition, wherein the thermosetting composition comprises, based on the total weight of the thermosetting composition a polybutadiene or polyisoprene resin, about 30 to about 70 percent by weight of a magnesium hydroxide having less than about 1000 ppm of ionic contaminants, and about 5 to about 15 percent by weight of a nitrogen-containing compound, wherein the nitrogen-containing compound comprises at least about 15 weight percent of nitrogen; and an adhesive layer disposed between and in intimate contact with the conductive layer and the dielectric layer, wherein the adhesive comprises a poly(arylene ether), wherein the circuit subassembly has a UL-94 rating of at least V-1.
Abstract:
A highly thermal conductive circuit board includes a composite substrate, and a metal layer, an insulating layer, and a conductor layer sequentially disposed on the composite substrate. When at least one electronic element is electrically disposed on the conductor layer of the highly thermal conductive circuit board, heat produced by the electronic element in operation is rapidly dissipated through characteristics such as a high thermal conductivity and a low thermal expansion coefficient of the highly thermal conductive circuit board.
Abstract:
The present invention relates to an adhesive film with which a flexible metal-clad laminate is obtained with suppressed dimensional changes occurred when produced by a laminating method; and a flexible metal-clad laminate comprising the adhesive film and a metal foil bonded thereto. The adhesive film comprises a polyimide film and, formed on at least one side thereof, an adhesive layer comprising a thermoplastic polyimide and has coefficients of linear expansion satisfying the relationship 1.0>(coefficient of linear expansion in the MD direction)/(coefficient of linear expansion in the TD direction)>0.1. This adhesive film may be one produced continuously and further satisfying the relationship 1.70>(elastic modulus in the MD direction)/(elastic modulus in the TD direction)>1.05 when the adhesive film has an MD modulus of 5 GPa or higher throughout the whole width thereof. That adhesive film may be one produced continuously and further satisfying the relationship 2.00>(elastic modulus in the MD direction)/(elastic modulus in the TD direction)>1.10 when the adhesive film has an MD modulus less than 5 GPa throughout the whole thereof.