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:
Dec. 23, 2014
Filed:
Oct. 29, 2009
Yoshinori Shibuya, Tokyo, JP;
Akihiko Shirakawa, Tokyo, JP;
Masahiro Suzuki, Tokyo, JP;
Showa Denko K.K., Tokyo, JP;
Abstract
A capacitor element is obtained by chemically converting an anode body comprising a niobium or niobium alloy in an electrolyte solution, which is obtained by dissolving an oxygen supply agent such as hydrogen peroxide, a freezing point depressant such as ethylene glycol, and an electrolyte such as phosphoric acid in water, at a solution temperature lower than the freezing point of a solution having the composition of the electrolyte solution excluding the freezing point depressant, for forming a dielectric layer in the surface of the anode body or repairing a dielectric layer formed in the surface of the anode body. An electrolytic capacitor is obtained by forming a cathode on the dielectric layer of the capacitor element, electrically connecting the anode body and the cathode respectively to external terminals, and then sealing them.