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:
Aug. 14, 2001
Filed:
Jun. 16, 1999
Henry Windischmann, Northboro, MA (US);
John L. Yuscinsky, Webster, MA (US);
Saint-Gobain Industrial Ceramics, Inc., Worcester, MA (US);
Abstract
The method of the present invention includes placing a solid dopant in or near the nozzle of a DC arc jet. According to one embodiment of the invention, the interior surface of an arc jet nozzle is coated with a layer of copper by brushing the surface with a copper brush. According to another embodiment of the invention, the interior surface of an arc jet nozzle is coated with a layer of copper by plating it with copper. According to another embodiment of the invention, a copper cylinder is placed inside an arc jet nozzle. Apparatus according to the invention include a DC arc jet with a solid dopant placed in or near the nozzle according to one of the methods described. Diamonds according to the invention are conductive diamonds formed by a plasma jet process where a solid dopant was placed in or near the nozzle according to one of the methods described. According to the invention, the conductivity of the diamonds formed with these methods and apparatus is controlled by varying the surface area of the solid dopant. By increasing the surface area, the amount of dopant material contained in the diamond will be increased. High conductivity diamonds can be cut to size by electrical discharge milling or machining (EDM).