Tantalum capacitor lead wire
AssigneeSupercon, Inc.
InventorJames Wong
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Abstract
A tantalum lead wire for capacitors having improved grain growth characteristics is disclosed. The lead preferably comprises a Niobium core having a surface consisting of many discrete layers of Tantalum surrounding the Niobium.
Claims8
The process of forming a tantalum capacitor lead comprising the steps of surrounding a metal billet with a layer of tantalum to provide at least one layer of tantalum around the billet, reducing the billet to rod, and drawing the rod to wire of diameter on the order of 0.4 mm.
A capacitor comprising flexible elongated metallic structure providing a lead to a capacitor anode formed of sintered tantalum powder, said flexible structure comprising a tantalum wire having a cross-section less than 1 mm, said wire comprising a core of a metal other than tantalum and at least one discrete surface layer of tantalum surrounding said core, the tantalum layer having a radial thickness less than 0.3 mm, both ends of said lead being outside of said sintered anode body whereby none of said core metal is exposed to the sintered tantalum powder of said anode.
Dependencies are inferred from the claim text.