Accession Number : ADD014714

Title :   In the United States Patent and Trademark Office Application for Letters Patent.

Descriptive Note : Patent Application, Filed 6 Jul 90,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Snail, Keith A ; Hansen, Leonard M

Report Date : 06 Jul 1990

Pagination or Media Count : 16

Abstract : Large diamond crystals (i.e. greater than 100 microns) are grown at low pressure by placing a clean substrate in a high atomic hydrogen flux atmosphere that allows a growing diamond surface to remain hydrogen terminated. This atmosphere can be provided by heating the substrate in the feather portion of a flame created by the combustion of a mixture of oxygen and acetylene. The size of the crystals and the rate of formation of those crystals are comparable to those obtained by HPHT processes. Patent applications. (JS)

Descriptors :   *CRYSTALS, ACETYLENE, COMBUSTION, DIAMONDS, HYDROGEN, LOW PRESSURE, MIXTURES, OXYGEN, PATENT APPLICATIONS, PATENTS, RATES, SUBSTRATES, SURFACES, UNITED STATES

Subject Categories : Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE