Multilayer ceramic capacitive element

Details Multilayer ceramic capacitive element Multilayer ceramic capacitive element

1990-05-18

1991-07-30

Griffin, Donald A.

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

29 2542, H01G 410

Patent

active

050364243

ABSTRACT:
A multilayer ceramic capacitor comprises plural ceramic dielectric layers laminated one on another, and at least two internal electrodes separated by the ceramic dielectric layer and alternately terminated at the opposite sides of the laminated ceramic dielectric layers. The ceramic dielectric layers is composed of a complex oxide including a component (A), a component (B) and copper, wherein the component (A), is at least one element selected from the group consisting of Pb, Ca, Sr and Ba, but contains Pb at the least, wherein the component (B) is at least two elements selected from the group consisting of Mg, Ni, Zn, Ti, Ta, Nb and W, the molar ratio of the component (A) to component (B) being not less than 0.985, but not more than 1.110, and wherein the content of said copper in the complex oxide is more than 0.650 wt %, but not more than 2.200 wt % in terms of Cu.sub.2 O. The internal electrodes are composed of copper or an alloy mainly comprising copper.

REFERENCES:
patent: 4063341 (1977-12-01), Bouchard et al.
patent: 4714570 (1987-12-01), Nakatani et al.
patent: 4855266 (1989-08-01), Burn
patent: 4885661 (1989-12-01), Yokotani et al.

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