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:
Feb. 14, 2012
Filed:
Sep. 01, 2006
Colin Mccracken, Sinking Springs, PA (US);
Nigel Patrick Grant, Galmpton Brixham, GB;
Colin McCracken, Sinking Springs, PA (US);
Nigel Patrick Grant, Galmpton Brixham, GB;
AVX Corporation, Myrtle Beach, SC (US);
Abstract
The present invention relates to the field of solid state capacitors, and in particular to capacitors that have an anode body formed of porous valve action material, such as tantalum, niobium or niobium monoxide. According to one aspect of the present invention, there is provided a method of forming capacitor anode bodies from valve action material comprising the steps of: providing a capacitor grade powder of the valve action material, charging the powder into a press mold, compacting the powder in the mold so as to shape the powder into an anode body shape, stabilizing the body shape, for example by sintering of the material to form an inter-connected porous body, characterized in that the molding process involves the use of a lubricant applied locally to lubricate the interface between an outside surface of the anode body and a molding surface of the mold.