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:
Jan. 09, 2018
Filed:
Oct. 06, 2014
Applicant:
Showa Denko K.k., Tokyo, JP;
Inventors:
Kazumi Naito, Tokyo, JP;
Ryuichi Mitsumoto, Tokyo, JP;
Assignee:
SHOWA DENKO K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01G 9/07 (2006.01); H01G 9/00 (2006.01); H01G 9/15 (2006.01); H01G 9/052 (2006.01);
U.S. Cl.
CPC ...
H01G 9/15 (2013.01); H01G 9/0032 (2013.01); H01G 9/052 (2013.01); H01G 9/0525 (2013.01); H01G 9/07 (2013.01);
Abstract
An anode body for an electrolytic capacitor, prepared by sintering a tungsten powder to obtain a sintered body and subjecting the obtained sintered body to chemical conversion to form a dielectric layer comprising a tungsten trioxide compound on the surface of the sintered body, wherein the ratio of the hydration water in the tungsten trioxide compound becomes one molecule or less to 10 molecules of the tungsten trioxide compound. Use of the anode body of the present invention enables production of a tungsten capacitor, which is reduced in the capacitance change due to DC voltage (bias dependency).