Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Tsutomu Inuzuka

Shinji Harada

Hiroshi Fujii

Satoshi Tomioka

Yuki Satoh

Yuji Mido

Michio Ohba

Tadashi Tojyo

Suzushi Kimura

Naoki Yuda

Shigeo Furukawa

Shogo Nakayama

Tsuyoshi Himori

Hironori Motomitsu

Misako Sakae

A common mode noise filter includes a nonmagnetic layer, first and second magnetic layers sandwiching the nonmagnetic layer between the magnetic layers and contacting the nonmagnetic layer, a plane coil provided between the first and second magnetic layers and contacting the nonmagnetic layer, and an external electrode connected electrically with the plane coil. The first and second magnetic layers include a magnetic oxide layer and an insulator layer provided on the magnetic oxide layer. The insulator layer contains glass component. This common mode noise filter has a large bonding strength between the external electrode and the insulator layer.

Common mode noise filter

A magnetic ferrite operating well in the GHz zone, and a magnetic device of superior high frequency characteristics which uses the magnetic ferrite for its magnetic core. The magnetic ferrite includes iron oxide, cobalt oxide and zinc oxide as the main components and at least one item selected from among the group consisting of titanium, tantalum, indium, zirconium, lithium, tin and vanadium as the side component.

Magnetic ferrite and magnetic device containing the ferrite

A magnetic element superior in high frequency characteristics is provided that comprises magnetic ferrite having iron oxide, cobalt oxide and zinc oxide as the main ingredients, a conducting coil formed over the magnetic ferrite, an insulating material covering the conducting coil, and two or more external electrodes connected with the conducting coil.

Magnetic element

An antenna capable of attaining the miniaturization thereof and the widening of a band in use, and an electronic device containing this antenna therein, having a miniaturized structure and adaptable to a wide band. This antenna is provided with a feeding element having a feeder end, an antenna core provided with the feeding element on an outer circumference thereof, a feeder lead connected to the feeder end, and a magnetic member covering the feeder end. This electronic device is provided with the antenna, a transmission system, and a reception system, and the feeder lead of the antenna is connected to at least one of the transmission system and reception system.

Antenna and electronic device using the same

A laminated high frequency device includes a laminated body including plural magnetic sheets having relative permeabilities larger than 1, inductor patterns for forming plural inductors in the laminated body, and capacitor patterns forming a capacitor. The capacitor patterns are opposed to each other about another sheet of the laminated body. The inductors have large inductances without thickening of the magnetic sheet or thinning of the inductor patterns providing a large conductor loss. This arrangement reduces a size of the laminated high frequency device while providing isolation between the inductors.

High frequency laminated device

Resistance wiring board and method for manufacturing the same

The present invention relates to ceramics and a method for making ceramics having very little dimensional change after sintering and high dimensional accuracies, so that the characteristics of inorganic functional material are fully maintained and utilized. The ceramics of the present invention comprise grains of inorganic functional material and grains of complex oxide. The pores existing between said grains of inorganic functional material are filled with said grains of complex oxide produced by a sintering reaction between an oxidized metal and an inorganic compound.

Method for manufacturing composite ceramics

The invention relates to a magnetic material and a method of manufacturing the same. An objective of the invention resides in providing a magnetic material whose dimensional change rate after sintering is low and whose magnetic property is not deteriorated. In order to achieve the objective, a magnetic material according to the invention comprises a great number of ferrite grains (1) which are formed by sintering ferrite raw powder, and shrinkage preventing grains (2) which are interposed among these plural ferrite grains (1) and which are sintered with the ferrite grains (1) in contact with the outer peripheries thereof and are also oxidized with oxygen so as to change into ferrite when they are sintered.

Growing community of inventors

Osaka, Japan

Tsutomu Inuzuka