Murata Manufacturing Co., Ltd.

Takehiko Otsuki

Katsuyuki Uchida

Toshio Kawabata

Kaoru Tachibana

Yukio Sakamoto

Masami Sugitani

Motoi Nishii

Hidetoshi Yamamoto

Kazuhiko Takenaka

Takashi Kodama

Tomoo Takazawa

A sintered ceramic has a porosity of greater than about 30 percent and less than about 80 percent by volume. Pores are filled with an epoxy resin. A filling factor of the epoxy resin is about 40 percent by volume or more. A monolithic ceramic electronic component having an inner electrode, for example, a chip inductor is manufactured with such a porous sintered ceramic. When a direct current is superimposed, the resulting monolithic ceramic electronic component has a substantially unchanged self-resonant frequency and also has a rate of decrease in impedance of about 50 percent or less at 100 MHz.

Monolithic ceramic electronic component

A noise filter includes a laminate body including magnetic layers, line conductors and ground conductors, with one line conductor and one ground conductor alternately arranged in interfaces between the magnetic layers. With an electrical signal applied to the line conductors with the ground conductors grounded, a high-frequency noise is attenuated using a magnetic loss of the magnetic layer.

Noise filter

A ceramic electronic component includes a ceramic sintered compact containing about 35 to 80 volume percent pores and an electrode provided inside the ceramic sintered compact. The pores are filled with resin or glass. This ceramic electronic component is formed by forming a green compact which includes an electrode therein with a ceramic compound having a ceramic raw material, a binder and a spherical or granular combustible material having adhesiveness to the binder. The green compact is fired to form the ceramic sintered compact including the electrode and containing about 35 to 80 volume percent pores. The pores of the ceramic sintered compact are filled with resin or glass.

Ceramic electronic component and method for making the same

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Omihachiman, Japan

Takehiko Otsuki