Patent · US Active

Single crystal synthetic diamond material

US11821107B2 · kind B2 · utility

0Cited by

2References

10Claims

0Family size

Assignee

Element Six Technologies Limited · AU

Inventors

Andrew Edmonds · San Diego, US
Matthew Lee Markham · Ascot, GB
Pierre-Olivier Francois Marc Colard · East Hagbourne, GB

Key dates

Filing date	Mar 30, 2020
Grant date	Nov 21, 2023
Priority date	—
Expiry date	Aug 2, 2040

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC30B33/00
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

Single crystal CVD diamond material comprising a total nitrogen concentration of at least 5 ppm and a neutral single substitutional nitrogen. Ns0, to total single substitutional nitrogen, Ns, ratio of at least 0.7. Such a diamond is observed to have a relatively low amount of brown colouration despite the relatively high concentration of nitrogen A method of making the single crystal diamond is also disclosed, the method including growing the CVD diamond in process gases comprising 60 to 200 ppm nitrogen, in addition to a carbon-containing gas, and hydrogen, wherein the ratio of carbon atoms in the carbon-containing gas to hydrogen atoms in the hydrogen gas is 0.5 to 1.5%.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.