Abstract:
A dielectric filter includes resonator electrodes, an inter-stage coupling capacitor electrode, and an input/output coupling capacitor electrode on dielectric substrates, respectively. The resonator electrodes are electro-magnetically coupled to each other to form a tri-plate structure, are made of a metallic foil embedded in a resonator dielectric substrate. Another dielectric filter includes an upper shield electrode dielectric substrate, an inter-stage coupling capacitor dielectric substrate, a resonator dielectric substrate, and an input/output coupling capacitor dielectric substrate which are made of a composite dielectric material including a high-dielectric-constant material and a low-dielectric-constant material. The above described arrangement provides the dielectric filter with an improved Q factor of a resonator, a low loss, and a high attenuation.
Abstract:
A multilayer wiring board is provided with a plurality of wiring boards which include a plurality of wiring layers including a pounding layer and a power supply layer a solid electrolytic capacitor wherein an insulating oxide film layer, an electrolyte layer and a conductive layer are successively formed on one plane or both planes of a foil-like metal base body; and a conductive member penetrating in a thickness direction of the wiring boards. The solid electrolytic capacitor is arranged to be sandwiched between the wiring boards, the conductive layer is connected to a grounding electrode formed on the grounding layer, and the foil-like metal base body is connected to a power supply electrode formed on the power supply layer.
Abstract:
A magnetic material is provided which includes a discrete phase including grains made of a first substance which comprises a magnetic metal; and a continuous phase including a thin coating film made of a second substance which comprises a dielectric or insulating substance. The thin coating film is formed on the surface of the grains and has a mean thickness smaller than the mean particle size of the grains. The grains are separated substantially from each other by the thin coating film.
Abstract:
Two or more electric elements (203), such as semiconductor chip and surface acoustic wave elements, are mounted on a wiring pattern (201), and molded with thermosetting resin (204). ?The upper surface of the electric elements (203) and the upper surface of a thermosetting resin (204) are ground so that their top surfaces may substantially level with each other. The grinding of the molded electric elements (203) can provide a mechanically rigid, thin module with built-in electric elements without causing damage the electric elements (203), while keeping contaminants or abrasives away from the electric elements (203) and the wiring pattern (201).
Abstract:
A composite material is provided which includes a discrete phase including grains made of a first substance; and a continuous phase including a thin coating film made of a second substance and formed on the surface of each of the grains. The thin coating film has a mean thickness smaller than the mean particle size of the grains. The grains are separated substantially from each other by the thin coating film. The porosity of the composite material is 5% or less.
Abstract:
A composite material is provided which includes a discrete phase including grains made of a first substance; and a continuous phase including a thin coating film made of a second substance and formed on the surface of each of the grains. The thin coating film has a mean thickness smaller than the mean particle size of the grains. The grains are separated substantially from each other by the thin coating film. The porosity of the composite material is 5% or less.
Abstract:
A multilayered substrate includes a plurality of circuit boards including a plurality of wiring layers including a grounding layer and a power layer, a solid electrolytic capacitor having an insulative oxide film layer, an electrolytic layer, and a conductor layer sequentially formed on one surface or both surfaces of a foil-like metal substrate, and a conductive substance passing through the circuit board across a thickness thereof. The solid electrolytic capacitor is disposed to be held between the plurality of circuit boards. The conductor layer is connected to a grounding electrode formed on the grounding layer, the foil-like metal substrate being connected to a power electrode formed on the power layer.
Abstract:
A magnetic material is provided which includes a discrete phase including grains made of a first substance which comprises a magnetic metal; and a continuous phase including a thin coating film made of a second substance which comprises a dielectric or insulating substance. The thin coating film is formed on the surface of the grains and has a mean thickness smaller than the mean particle size of the grains. The grains are separated substantially from each other by the thin coating film.
Abstract:
PROBLEM TO BE SOLVED: To provide a compound wiring board which is flexibly adaptive to design alterations by easily making a substrate multi-layered at an arbitrary position, and to provide a compound wiring board having a cavity structure where circuit components can be arranged in three dimensions. SOLUTION: The compound wiring board comprises a first wiring board which has a first electric insulating base material and a wiring pattern formed on the first electric insulating base material; a second wiring board which has a second electric insulating base material and a wiring pattern formed on the second electric insulating base material, and in a part of which a cavity is formed in at least a portion of it; and a third electric insulating base material which has a conductor unit electrically connecting the wiring pattern of the first wiring board and the wiring pattern of the second wiring board, while the first wiring board and the second wiring board are bonded together along the thickness, and in a part of which a cavity is formed in at least a portion of it. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a circuit board with a thin and high capacitance built-in solid electrolytic capacitor having highly reliable insulation. SOLUTION: In the circuit board with the built-in solid electrolytic capacitor and a built-in valve metal sheet 1 having a porous portion, the solid electrolytic capacitor is formed in a portion of the valve metal sheet 1, and the porous portion 2 in the region of the valve metal sheet 1 wherein the solid electrolytic capacitor is not formed is filled with an insulating layer 3 consisting of a cured material of a liquid resin, and the solid electrolytic capacitor and the wiring pattern 4 of the circuit board are electrically connected together. COPYRIGHT: (C)2007,JPO&INPIT