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. 28, 2004
Filed:
Feb. 07, 2003
Kazumi Naito, Chiba, JP;
Isao Kabe, Chiba, JP;
Showa Denko K.K., Tokyo, JP;
Abstract
A niobium sintered body which is prepared in such a manner that a niobium powder is sintered at a temperature of 500° C. to 2000° C. and allowed to stand at a maximum sintering temperature for 60 minutes to 150 minutes in the course of sintering. The niobium sintered body of the present invention is characterized in that a product (CV) of a capacitance (C) per unit mass and a forming voltage (V) is 90,000 &mgr;F·V/g or more, and a value obtained by dividing a product of a mean particle diameter (D ) of a primary particle of said niobium powder and a leakage current (LC) by said CV is 5×10 &mgr;m·&mgr;A (&mgr;F·V) or less. And there can be provided a well-balanced capacitor with respect to a preferably low leakage current value regardless of the large capacitance, that is, a highly reliable capacitance.