Patent ID: 7942966
Filing Date: 2011-05-17
Classification: C30B,Y10T

Abstract:
1. A method of growing single crystal diamond, the method comprising: polishing a CVD grown single crystal seed having a (100) orientation; placing the seed in a substrate holder in a plasma reactor; evacuating the reactor to a pressure of less than 10 millitorr; backfilling the reactor with hydrogen having a purity of at least approximately 99.999%; providing power to create a plasma ball; heating the substrate holder to approximately 900° C.; adding methane containing diborane to obtain a mixture of methane and hydrogen containing approximately 1000 ppm diobrane; converting part of the hydrogen to atomic hydrogen; after formation of a desired thickness of single crystal boron doped diamond, terminating the flow of diborane; continuing the flow of methane for a predetermined time after termination of the diborane; after the end of flow of the methane, terminating the power to extinguish the plasma ball; and cooling the substrate holder to room temperature.