Patent ID: 11913111
Assignee: ELEMENT SIX TECHNOLOGIES LIMITED
Field: Surface technology, coating (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method of fabricating a polycrystalline CVD synthetic diamond wafer, the method comprising:
locating a substrate in a first CVD reactor;
introducing process gases into the first CVD reactor, wherein the process gases within the CVD reactor comprises a carbon containing gas and hydrogen, and using the process gases to form a plasma;
growing a first polycrystalline CVD synthetic diamond wafer to a first thickness on the substrate;
removing the first polycrystalline CVD synthetic diamond wafer from the first CVD reactor;
removing the first polycrystalline CVD synthetic diamond wafer from the substrate;
cutting at least one second smaller wafer from the polycrystalline CVD synthetic diamond wafer;
locating the at least one second smaller wafer on a carrier;
locating the carrier and second smaller wafer in a second CVD reactor;
introducing process gases into the second CVD reactor, wherein the process gas within the second CVD reactor comprises nitrogen, a carbon containing gas, and hydrogen, and using the process gases to form a plasma; and
growing further polycrystalline CVD synthetic diamond material on the second smaller wafer to a second thickness to give a polycrystalline CVD synthetic diamond material having a total thickness of the combined first and second thicknesses.