US Patent 7142409 Nitrided valve metal material and method of making same

Patent 7142409 was granted and assigned to Cabot Corporation on November, 2006 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Cabot Corporation

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7142409

Patent Inventor Names

Shi Yuan0

Date of Patent

November 28, 2006

Patent Application Number

10894535

Date Filed

July 20, 2004

Patent Primary Examiner

‌

Eric W Thomas

Patent abstract

Valve metal material, including a valve metal, a nitride layer located on the valve metal, and an oxide layer located on the nitride layer is described. Methods of forming such a valve metal material are also described. The method includes forming an oxide layer onto the valve metal and then forming a nitride layer between the oxide layer and the valve metal.