US 12,480,224 B2
Method for forming diamond having a desirable color by chemical vapor deposition comprising growing a doped diamond layer on a single crystal substrate
John P. Ciraldo, Chicago, IL (US); and Jonathan Levine-Miles, Chicago, IL (US)
Assigned to Advanced Diamond Holdings, LLC, Beltsville, MD (US)
Filed by Advanced Diamond Holdings, LLC, Beltsville, MD (US)
Filed on Jan. 15, 2021, as Appl. No. 17/150,751.
Claims priority of provisional application 62/962,461, filed on Jan. 17, 2020.
Prior Publication US 2021/0222324 A1, Jul. 22, 2021
Int. Cl. C30B 25/16 (2006.01); C30B 29/04 (2006.01)
CPC C30B 29/04 (2013.01) [C30B 25/16 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of forming a CVD diamond, the method comprising:
providing a single-crystal substrate; and
growing a first doped diamond layer directly or indirectly on the substrate, the first doped diamond layer including a first dopant, a second dopant, and a third dopant, each of the dopants being introduced into the CVD growth environment at non-trivial prescribed concentrations to produce a desired color that is closer to colorless on a diamond color scale relative to a diamond with any two of the three dopants, each of the three dopants being different from one another and being selected from the list of: boron, silicon, nitrogen, sulfur, phosphorous, chromium arsenic, nickel, germanium, cobalt, and aluminum.