Murata Manufacturing Co., Ltd.

Hironori Suzuki

Tomoyuki Nakamura

Takehisa Sasabayashi

Gota Shinohara

Akihiro Shiota

Makoto Matsuda

Noriko Shimizu

Masaki Kitajima

Masayuki Ishihara

Tomonori Muraki

Kuniaki Yosui

Yoshimasa Yoshioka

Kouji Yamauchi

Takashi Tomohiro

Yoichi Nakatsuji

Yasushi Takeda

Takao Kawachi

Junji Kurobe

Naoya Noo

Kazuo Muto

Hideyasu Onishi

An inductor component comprising a laminated body having a magnetic layer containing a resin and a metal magnetic powder contained in the resin; an inductor wiring disposed in the laminated body; and an external terminal exposed from the laminated body. The external terminal includes a metal part and a resin part, and in a cross section of the external terminal, the resin part is enclosed in the metal part.

Inductor component

An electronic component includes a body made of a material containing particles of a metallic magnetic material, and an outer electrode disposed on a surface of the body. The surface of the body has a contact portion with which the outer electrode is in contact, and the surface of the body includes particles of the metallic magnetic material which are exposed from the surface of the body.

Electronic component and method of manufacturing the same

A coil is formed by winding an electrically-conductive wire, and is buried in a molded body formed from a composite magnetic material containing a magnetic powder and a resin. Each of led-out ends of the coil has a cut surface formed by obliquely cutting an electrically-conductive wire with respect to a surface thereof. The cut surface of each led-out end of the coil is exposed on a surface of the molded body, and each led-out end is connected to an external terminal electrode formed in the surface of the molded body at the cut surface.

Electronic component

In an inductor component, fallen-off-filler marks that are formed as a result of a filler falling off from an outer surface of a component body are present in a dotted manner in portions of the outer surface that are in contact with outer electrodes. As a result of the filler falling off, a joining area at interfaces between the component body and the outer electrodes increases, and stress generated at the interfaces between the component body and the outer electrodes is reduced.

Inductor component and method for manufacturing the same

An inductor manufacturing method includes a first step of press bonding a Cu foil onto a non-magnetic resin sheet, a second step of forming a conductor pattern by performing etching on the Cu foil, a third step of press bonding another non-magnetic resin sheet onto the conductor pattern, and a via conductor formation step of forming a via conductor that penetrates through the other resin sheet and leads to the conductor pattern. The method further includes a step of forming a body in which resin having magnetism is provided outside of a coil, by press bonding magnetic-powder-containing resin sheets onto a multilayer body, obtained by a manufacturing method including the first to third steps and the via conductor formation step, and then thermally curing the magnetic-powder-containing resin sheets.

Inductor manufacturing method

In a dielectric ceramic having crystal grains and containing a perovskite in which the A site contains Ba and the B site contains Ti. as a main component, the crystal orientations are aligned in substantially the same direction within the crystal grains. Some of Ba may be replaced with Ca and/or Sr, and some of Ti may be replaced with Zr and/pr Hf. This achieves a dielectric ceramic which has a high dielectric constant and has favorable AC electric field characteristics in which the change in dielectric constant is small even with changes in applied electric field.

Dielectric ceramic and multilayer ceramic capacitor

A dielectric ceramic contains a barium titanate and Li. In the dielectric ceramic, the following inequalities are satisfied: 0.5&#x2266;e&#x2266;6.0, 0.06&#x3c;Rg&#x3c;0.17, and &#x3c3;g&#x3c;0.075, where e is the content, in molar parts, of Li with respect to 100 molar parts of the titanate; Rg is the average size, in &#x3bc;m, of grains in the dielectric ceramic; and &#x3c3;g is the standard deviation, in &#x3bc;m, of the size of the grains.

Dielectric ceramic, method for producing dielectric ceramic, and monolithic ceramic capacitor

A dielectric ceramic material is composed of a perovskite compound represented by ABOas a main component. In the case where ABOis, for example, BaTiO, the crystal grains include BaTiOcrystal grains composed of the main component and, as secondary phases, Mg&#x2014;Ni&#x2014;Ti-containing crystalline grains composed of a crystalline oxide containing at least Mg, Ni, and Ti and Ba&#x2014;Si-containing crystalline grains composed of a crystalline oxide containing at least Ba and Si.

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Nagaokakyo, Japan

Hironori Suzuki