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. 14, 2011
Filed:
Dec. 26, 2005
Takayuki Matumoto, Takeo, JP;
Tetsuyuki Sakuda, Imari, JP;
Takayuki Matumoto, Takeo, JP;
Tetsuyuki Sakuda, Imari, JP;
Sanyo Electric Co., Ltd., Moriguchi-shi, JP;
Saga Sanyo Industries Co., Ltd., Saga, JP;
Abstract
A multi-layered solid electrolytic capacitor and a method of manufacturing the capacitor that improve the product yield drastically by preventing increases in leakage current and defects due to short circuits without increasing manufacturing cost or capacitor size. A multi-layered solid electrolytic capacitor includes: a plurality of capacitor elements, each including an aluminum foil having an anode portion and a cathode portion having a dielectric oxide film and a cathode layer formed in succession on a surface of the aluminum foil, wherein the plurality of capacitor elements are stacked on top of one another, the anode portions of adjacent capacitor elements are welded each other, and the anode portion of one of the outermost capacitor elements is weld-secured to an anode terminal, the multi-layered solid electrolytic capacitor having a first stress alleviating groove and a second stress alleviating groove formed in at least one of weld surfaces of the anode portion.