Timothy A Potter

US Patent:

52098125, May 11, 1993

Filed:

Apr 9, 1990

Appl. No.:

7/506633

Inventors:

Michael A. Tamor - Toledo OH
Timothy J. Potter - Dearborn MI

Assignee:

Ford Motor Company - Dearborn MI

International Classification:

C30B 2506

US Classification:

156613

Abstract:

A method of growing high purity diamond crystallite structures at relatively high growth rates on a temperature resistant substrate, comprising (a) flowing diamond producing feed gases at low pressure through a reaction chamber containing the substrate, the feed gases being comprised of hydrocarbon devoid of methyl group gases, i. e. , acetylene or ethylene, diluted by hydrogen, and (b) while concurrently raising the temperature of the substrate to the temperature range of 600. degree. -1000. degree. C. , thermally activating the feed gases by use of a hot filament located within the chamber and upstream and adjacent the substrate, the filament being heated to a temperature above 1900. degree. C. , that is effective to generate a substantial atomic hydrogen (H) concentration and carbon containing free radicals. A substantial additional loss in carbon balance of the gases is triggered at a lower filament temperature indicative of the formation of intermediate substances that stimulate diamond growth.

US Patent:

54259657, Jun 20, 1995

Filed:

Dec 27, 1993

Appl. No.:

8/172969

Inventors:

Michael A. Tamor - Toledo OH
Timothy J. Potter - Dearborn MI

Assignee:

Ford Motor Company - Dearborn MI

International Classification:

C23C 1600

US Classification:

427249

Abstract:

This invention is directed to a method for enhancing the diamond nucleation on a substrate prior to providing a diamond film thereon. More particularly, it is directed to a method which involved ultrasonic treatment of the substrate surface with a fluid consisting essentially of unsaturated oxygen-free hydrocarbons and diamond grit.