Abstract:
A fabricating method of a wiring board provided with passive elements is disclosed. The fabricating method includes coating one or both of resistive paste and dielectric paste on at least any one of first surfaces of a first metal foil and a second metal foil each of which has a first surface and a second surface; arranging an insulating board having thermo-plasticity and thermo-setting properties so as to face the first surface of the first metal foil, and arranging the first surface side of the second metal foil so as to face a surface different from a surface to which the first metal foil faces of the insulating board; forming a double-sided wiring board by stacking, pressurizing and heating the arranged first metal foil, insulating board, and second metal foil, and thereby integrating these; and patterning the first metal foil and/or the second metal foil.
Abstract:
There are provided an upper electrode 18 and a lower electrode which are formed like flat plates, a dielectric layer interposed between the upper electrode and the lower electrode, and a covering portion which covers an external surface of at least one of the upper electrode and the lower electrode and is formed by an insulating resin. At least one of the upper electrode and the lower electrode is provided with at least one of opening holes having larger diameters than a via formed in a connection to a wiring pattern when a capacitor component is to be included in a substrate.
Abstract:
A multilayer composite including a core made of a magnetic ceramic sintered compact disposed therein, and shrinkage restraining layers including an inorganic powder that is not substantially sintered at the sintering temperature of the green ceramic layers are sintered in order to reduce the difference in shrinkage behavior during firing between the core and the green ceramic layers.
Abstract:
A multilayer printed wiring board including an insulation layer and a first interlayer resin insulation layer provided on the insulation layer. A layered capacitor section is provided on the first interlayer resin insulation layer and has a high dielectric layer and first and second layered electrodes that sandwich the high dielectric layer. Also included is a second interlayer resin insulation layer provided on the first interlayer resin insulation layer and the layered capacitor section, and a metal thin-film layer provided over the layered capacitor section and on the second interlayer resin insulation layer. An outermost interlayer resin insulation layer is provided on the second interlayer resin insulation layer and the metal thin-film layer, and a mounting section is provided on the outermost interlayer resin insulation layer and has first and second external terminals to mount a semiconductor element. Multiple via conductors penetrate each interlayer resin insulation layer. The via conductors include first via conductors that electrically connect the first layered electrode to the first external terminals, and second via conductors that electrically connect the second layered electrode to the second external terminals.
Abstract:
One embodiment of the present invention provides a device for providing a low noise power supply package to an IC in the mid-frequency range of 1 MHz to 3 GHz including installing in said package an array of embedded discrete ceramic capacitors, and optionally planar capacitor layers. A further embodiment provides a device for providing a low noise power supply package to an IC in the mid-frequency range of 1 MHz to 3 GHz including an array of embedded discrete ceramic capacitors with different resonance frequencies, arranged in such a way that the capacitor array's impedance vs frequency curve in the critical mid-frequency range yields impedance values at or below a targeted impedance value.
Abstract:
A method of forming a device associated with a via includes forming an opening or via, and forming at least a pair of conducting paths within the via. Also disclosed is a via having at pair of conducting paths therein.
Abstract:
In a method for manufacturing a printed circuit board with a thin film capacitor embedded therein, a conductive metal is sputtered via a first mask to form a lower electrode. A dielectric material is sputtered via a second mask to form a dielectric layer. The conductive metal is sputtered via a third mask to form an upper electrode. An insulating layer is stacked on a stack body with the upper electrode formed therein and via holes are perforated from a top surface of the insulating layer to a top surface of the lower electrode and from the top surface of the insulating layer to a top surface of the upper electrode formed on the substrate. Also, the stack body with the via holes formed therein is electrolytically and electrolessly plated.
Abstract:
This invention relates to compositions, and the use of such compositions for protective coatings, particularly of electronic devices. The invention concerns fired-on-foil ceramic capacitors coated with a composite encapsulant and embedded in a printed wiring board.
Abstract:
This invention relates to a capacitive/resistive device, which may be embedded within a layer of a printed wiring board. Embedding the device conserves board surface real estate, and reduces the number of solder connections, thereby increasing reliability. More specifically, the device, comprises a first metallic foil; a second metallic foil; a first electrode formed from the first metallic foil; a dielectric disposed over the first electrode; a resistor element formed on and adjacent to the dielectric; a conductive trace; and a second electrode formed from the second metallic foil and disposed over the dielectric and in electrical contact with the resistor element, wherein the dielectric is disposed between the first electrode and the second electrode and wherein said dielectric comprises an unfilled polymer of dielectric constant less than 4.0.