Taiyo Yuden Co., Ltd.

Ryuichi Shibasaki

Nobuyuki Yamaguchi

Hirotaka Ohno

Makoto Sakata

Tomoyasu Eguchi

Kenichi Kitazawa

A ceramic electronic device includes: a multilayer chip in which each of internal electrode layers and each of dielectric layers are alternately stacked, wherein the multilayer chip has a first capacity region having a first electrostatic capacity Cand a first inductance Land a second capacity region having a second electrostatic capacity Cand a second inductance L, wherein the first electrostatic capacity C, the first inductance L, the second electrostatic capacity Cand the second inductance Lsatisfy (C&#xb7;L)/(C&#xb7;L)&#x3c;0.5 or 1.9&#x3c;(C&#xb7;L)/(C&#xb7;L).

Ceramic electronic device and wiring substrate

A multi-layer ceramic capacitor includes a ceramic body and external electrodes. The ceramic body includes ceramic layers laminated in a first direction, first and second internal electrodes between the ceramic layers, a facing portion in which the internal electrodes face in the first direction, and a cover that covers the facing portion in the first direction. The facing portion includes a first region including at least one element of manganese, a rare-earth element, or magnesium and having a flat distribution of a concentration of the element along the first direction, and a second region disposed between the cover and the first region and having an increasing concentration of the element from the first region toward the cover. The ceramic layers include a capacitance forming layer between the first and second internal electrodes, and a dummy layer between the first or second internal electrodes and across the first and second regions.

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Takasaki, Japan

Ryuichi Shibasaki