Multilayer ceramic capacitor
AssigneeMurata Manufacturing Co., Ltd.
InventorsToru Wakamatsu, Daisuke Hamada
Life of this patent
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Abstract
In a multilayer ceramic capacitor including first and second inner electrodes alternately arranged with respect to a stacking direction of a multilayer body, a polarity based on a direction of voltage applied between a first outer electrode and a second outer electrode is determined such that the first inner electrodes function as positive electrodes and the second inner electrodes function as negative electrodes. The first inner electrodes have a first metal composition including Ni as a main component, and the second inner electrodes have a second metal composition including Ni as a main component, and at least one metal element selected from Au, Pt, Ir, Pd, Os, Ag, Rh, Ru, and Cu, which have standard electrode potentials higher than that of Ni, as an additive component.
Claims15
A multilayer ceramic capacitor comprising:
- a multilayer body including a plurality of dielectric layers that are made of a ceramic and are stacked on top of each other, and a plurality of inner electrodes along interfaces between the plurality of dielectric layers;
- and
- a plurality of outer electrodes on outer surfaces of the multilayer body and electrically connected to the inner electrodes;
- wherein
- the plurality of inner electrodes include a plurality of first inner electrodes and a plurality of second inner electrodes that are alternately arranged with respect to a stacking direction of the multilayer body;
- the plurality of outer electrodes include a first outer electrode electrically connected to the plurality of first inner electrodes and a second outer electrode electrically connected to the plurality of second inner electrodes;
- a polarity based on a direction of voltage applied between the first outer electrode and the second outer electrode is determined such that the plurality of first inner electrodes function as positive electrodes and the plurality of second inner electrodes function as negative electrodes;
- the plurality of first inner electrodes have a first metal composition that includes Ni as a main component;
- the first metal composition of the plurality of first inner electrodes does not include a first metal element having a standard electrode potential higher than that of Ni;
- and
- the plurality of second inner electrodes have a second metal composition that includes Ni as a main component and at least one second metal element selected from Au, Pt, Ir, Pd, Os, Ag, Rh, Ru, and Cu, which have standard electrode potentials higher than that of Ni, as an additive component.
Dependencies are inferred from the claim text.