Thomas W Thorpe

US Patent:

55273920, Jun 18, 1996

Filed:

Mar 15, 1994

Appl. No.:

8/213210

Inventors:

Keith A. Snail - Silver Spring MD
Thomas P. Thorpe - Alexandria VA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

C23C 1600

US Classification:

118725

Abstract:

One of the critical experimental parameters affecting the quality and gro rate of chemical vapor deposition species, such as, diamond is the substrate temperature. An apparatus and technique for the precise control of the substrate temperature in a chemical vapor deposition environment has been developed. In a preferred embodiment, the technique uses a variable gas mixture in conjunction with the disclosed apparatus of the present invention to precisely control the temperature of the substrate to within at least. +-. 20. degree. C. for extended periods of time and over large area substrates on the order of 1" in diameter or larger.

US Patent:

53188012, Jun 7, 1994

Filed:

May 18, 1993

Appl. No.:

8/062889

Inventors:

Keith A. Snail - Silver Spring MD
Thomas P. Thorpe - Alexandria VA

Assignee:

United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

C23C 1600
B01J 306

US Classification:

4272481

Abstract:

One of the critical experimental parameters affecting the quality and gro rate of chemical vapor deposition species, such as, diamond is the substrate temperature. An apparatus and technique for the precise control of the substrate temperature in a chemical vapor deposition environment has been developed. In a preferred embodiment, the technique uses a variable gas mixture in conjunction with the disclosed apparatus of the present invention to precisely control the temperature of the substrate to within at least. +-. 20. degree. C. for extended periods of time and over large area substrates on the order of 1" in diameter or larger.

US Patent:

58043217, Sep 8, 1998

Filed:

Jul 30, 1993

Appl. No.:

8/099640

Inventors:

Thomas P. Thorpe - Alexandria VA
Keith A. Snail - Silver Spring MD

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

C30B 2904

US Classification:

428623

Abstract:

A unitary article that is solid at a temperature in excess of about 1100. ree. C. which includes a diamond, a metal, and a brazing material brazing the diamond and the metal. The brazing material includes a metal carbide adhering to the diamond and a platinum family metal or nickel adhering to the metal. The platinum family metal has dissolved therein carbide forming metal and contains particles of metal carbide. The article is made by depositing a platinum family metal or nickel on a metal melting above the melting point of the platinum family metal or nickel, depositing a carbide forming metal which is soluble in molten platinum family metal or nickel, heating the assembly until platinum family metal or nickel is in a molten state, and cooling the molten platinum family metal or nickel to a solid state. In another embodiment, the article of this invention is made by depositing an alloy of nickel and chromium on a metal melting above the melting point of the alloy, depositing a diamond on the alloy, heating to melt the alloy, and cooling the alloy to a solid state.

US Patent:

55051588, Apr 9, 1996

Filed:

Nov 4, 1994

Appl. No.:

8/334088

Inventors:

Thomas P. Thorpe - Alexandria VA
Ronald A. Weimer - Boise ID

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

C30B 2514

US Classification:

117 89

Abstract:

A novel apparatus and method for the cyclic growth-etch deposition of diamond on a substrate by flame chemical vapor deposition (CVD) is developed. The cyclic growth-etch diamond deposition is accomplished by placing a suitable substrate to be coated under a CVD flame and providing a disk or face plate or other shapes having one or more teeth (or holes) wherein upon rotation of the disk, or face plate, or other shape, the teeth attached to the disk, or face plate, or other shape obstruct the path of the CVD flame from contacting the substrate at a desired time scale of. tau. sub. growth and t. sub. cycle to produce high quality (FWHM of 1-3. 5 cm. sup. -1) diamond.