Patent ID: 7060130
Filing Date: 2006-06-13
Classification: C30B

Abstract:
1. A process for producing heteroepitaxial growth of a single crystal diamond film which comprises: (a) forming an atomically flat stepped surface on a single crystal metal oxide substrate which has a crystal structure for depositing a film of epitaxial iridium to produce a (001) film on the surface; (b) depositing the film of the epitaxial iridium metal on the metal oxide so that the (001) surface results; (c) depositing by chemical vapor deposition (CVD) diamond nuclei onto the iridium film on the substrate, which is mounted on a holder for the substrate which holder has a negative bias and which holder comprises an insulating shield and a cap in the plasma, wherein the diamond nuclei emerge from a plasma produced from a mixture comprising methane and hydrogen gases with dc-biased ion bombardment onto the iridium film; and (d) growing the diamond film on the diamond nuclei condensate and iridium film using CVD and the mixture of the methane and the hydrogen, without the dc-biased ion bombardment to form the single crystal diamond.