Patent ID: 8460464
Filing Date: 2013-06-11
Classification: C30B

Abstract:
1. A method for producing one or more single crystalline diamonds, the method comprising the steps of: (a) placing one or more substrates on a substrate holder in a chemical vapor deposition (CVD) vacuum chamber, wherein growth faces of the one or more substrates have a crystallographic orientation of (100); (b) providing a mixture of gases, including at least one gas having a carbon component, adjacent to the one or more substrates in the CVD vacuum chamber; (c) generating plasma from the mixture of gases by exposing the mixture of gases to a microwave radiation; (d) introducing free radicals of nitrogen in the plasma, wherein the free radicals of nitrogen are produced in a remote reactive gas generator, wherein concentration of the free radicals of nitrogen is 0.05 ppm to 1 ppm; and (e) exposing the one or more substrates to the plasma under conditions wherein diamond growth occurs on the growth faces of the one or more substrates to produce the one or more single crystalline diamonds.