Diamond
AssigneeElement Six Limited
InventorsDaniel James Twitchen, Geoffrey Alan Scarsbrook, Philip Maurice Martineau, Paul Martyn Spear, Stephen David Williams, Ian Friel
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Abstract
A method of producing a CVD single crystal diamond layer on a substrate includes adding into a DVD synthesis atmosphere a gaseous source comprising silicon. The method can be used to mark the diamond material, for instance to provide means by which its synthetic nature can more easily be determined. It can also be exploited to generate single crystal diamond material of high color.
Claims21
A CVD single crystal diamond layer comprising from 1×1014 to 5×1017 atoms/cm3 of nitrogen and either from 1013 to 2×1018 atoms/cm3 of silicon atoms or from 1014 to 1018 atoms/cm3 of boron atoms in the majority volume of the diamond layer, wherein the diamond layer is colourless or near colourless.
Dependencies are inferred from the claim text.