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:
Apr. 03, 2007
Filed:
Sep. 22, 2004
Kazunori Ito, Tokyo, JP;
Yuusaku Horie, Tokyo, JP;
Kazuyuki Hasebe, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A laminated ceramic capacitor C has a plurality of internal electrodes embedded in a dielectric base substance in a stratified manner, the internal electrodes are caused to conduct to a pair of terminal electrodes provided on an outer surface of the dielectric base substance, and the terminal electrode has an outermost layer containing Sn as a main component. There is provided a step of setting the laminated ceramic capacitor in a temperature environment which is not less than 125° C. and not more than 180° C. and applying a direct-current voltage between the terminal electrodes in order to measure a direct-current insulation resistance. The step of applying the direct-current voltage includes a first step and a second step. A direct-current voltage V(V/μm) which falls within a range of 20 to 40 (V/μm) is applied at the first step, and a direct-current voltage V(V) with a rated voltage being taken into consideration is applied at the second step after termination of the first step.