High capacitance electrode and methods of producing same
AssigneeMedtronic, Inc.
InventorJoachim Hossick-Schott
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Abstract
The present invention provides improved cathodes and methods for producing such cathodes for ultimate use in conjunction with valve metal capacitors. A family of titanium carbide cathodes according to the present invention can be produced so that they inhabit a pre-existing metallic surface such as an inner surface of a titanium casing adjacent but insulated from direct electrical communication from an anode. Foil-type valve metal anodes as well as porous valve metal anodes formed from metallic powders may be used in conjunction with the titanium cathodes of the present invention.
Claims30
A method of fabricating a cathode, comprising:
- depositing a carbon material on a portion of a titanium substrate;
- annealing the carbon material and the substrate in a heated atmosphere at a reduced pressure to form an intermediate titanium carbide layer between the deposited carbon material and the titanium substrate;
- and
- removing remaining carbon material to expose the intermediate titanium carbide surface as an active cathode material.
A carbide cathode, consisting of:
- a titanium substrate;
- and
- a layer of titanium carbide disposed on a surface portion of said substrate.
Dependencies are inferred from the claim text.