Patent ID: 7589004

Claim:
A method of implanting a predetermined concentration of at least one impurity in a wide band gap compound, comprising: a) providing a single crystal of the wide band gap compound; b) providing at least one impurity; c) implanting the predetermined concentration of the at least one impurity in the single crystal of the wide band gap compound by a plurality of implantation cycles, wherein a number of implantation cycles is sufficient to implant the predetermined concentration of the at least one impurity in the single crystal of the wide band gap compound, and wherein each of the implantation cycles comprises: i) implanting a portion of the predetermined concentration of the at least one impurity in the single crystal; and ii) annealing the single crystal and implanted portion at a predetermined temperature for a predetermined time, wherein annealing repairs damage to the single crystal caused by implanting and activates the implanted impurity; and iii) cooling the annealed single crystal and implanted portion at a predetermined cooling rate to a temperature of less than about 100° C.