Murata Manufacturing Co., Ltd.

Tomoo Takazawa

Iwao Fukutani

Toshio Hori

Toshio Kawabata

Kaoru Tachibana

Takehiko Otsuki

A monolithic ceramic electronic component includes a low-permeability coil portion formed by stacking low-permeability ceramic green sheets, a first coil and a relatively large number of pores, and a high-permeability coil portion formed by stacking high-permeability ceramic green sheets, a second coil and a relatively small number of pores. The first coil and the second coil are electrically connected in series to form a spiral coil. The coil portion composed of a ferrite ceramic having a small number of pores has a high permeability and a high dielectric constant, and the coil portion composed of a ferrite ceramic having a large number of pores has a low permeability and a low dielectric constant.

Monolithic ceramic electronic component and method for making the same

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 monolithic ceramic component includes a coil-including region formed by stacking ceramic green sheets for defining inner layers having a porosity of about 30% to about 80%, and outer layer regions formed by stacking ceramic green sheets for defining outer layers have a porosity of about 10% or less. Outer electrodes are provided on the right end surface and the left end surface of a sintered ceramic laminate. That is, the outer electrodes are provided on the main surfaces of outermost ceramic sheets for outer layers.

Monolithic ceramic electronic component and method for manufacturing monolithic ceramic electronic component

A connector having a housing with a cavity, a terminal fixed in the housing and a resistance board. The resistance board has an elastic insulating board and a number of conductors which are provided in the insulating board such that each conductor shows on an upper surface and a lower surface of the insulating board. The resistance board is inserted in the cavity of the housing so as to lie on an end portion of a flexible cable. A signal-transmitting conductor of the flexible cable is electrically connected with the terminal via the conductors of the resistance board.

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Fukui, Japan

Tomoo Takazawa