The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 30, 1991
Filed:
May. 18, 1990
Yoichiro Yokotani, Suita, JP;
Hiroshi Kagata, Katano, JP;
Junichi Kato, Osaka, JP;
Seiichi Nakatani, Hirakata, JP;
Yukio Terada, Neyagawa, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
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.