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:

1990-07-06

Pagination or Media Count:

16.0

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