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:
Jun. 27, 2017
Filed:
Feb. 12, 2014
Laminated ceramic capacitor having rare-earth element in crystal grains of dielectric ceramic layers
Murata Manufacturing Co., Ltd., Nagaokakyo-Shi, Kyoto-fu, JP;
Akihiro Shiota, Nagaokakyo, JP;
Makoto Matsuda, Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Nagaokakyo-Shi, Kyoto-Fu, JP;
Abstract
A laminated ceramic capacitor that includes a laminated body that has dielectric ceramic layers including crystal grains and crystal grain boundaries and has internal electrode layers; and external electrodes on the surface of the laminated body and electrically connecting the internal electrode layers exposed at the surfaces of the laminated body. When a direct-current voltage is applied to the laminated ceramic capacitor, the voltage/current curve has a critical point dividing the curve into a first area on the lower-voltage side and a second area on the higher-voltage side, an electric field obtained by dividing the critical voltage at the critical point by the thickness of one of the dielectric ceramic layers when the voltage (V)/current (I) characteristics are measured at 25° C. is 10 V/μm or more, and the voltage/current curve has a slope of 3 or less in the second area.