Patent ID: 6815323
Filing Date: 2004-11-09
Classification: H01L,Y10S

Abstract:
The method of fabricating a graphitic sp2 Carbon-inclusive ohmic contact for an n-type Silicon Carbide semiconductor device, said method comprising the steps of:providing a clean surfaced wafer sample of n-type Silicon Carbide of selected doping concentration between 1Ã—1016 and 1Ã—1020 atoms per cubic centimeter; covering said sample clean surface with a layer of amorphous sp2 and sp3 Carbon mixture; supplying a layer of Carbon conversion-accelerating catalytic metal over said sample layer of amorphous sp2 and sp3 Carbon mixture; converting a substantial portion of said catalytic metal covered amorphous sp2 and sp3 Carbon mixture on said sample to metal catalyzed nano-sized graphitic flakes of sp2 Carbon; said converting step including a heat treating annealing of said sample at a temperature of at least 700 degrees Celsius, a temperature selected in response to said selected doping concentration between 1Ã—1016 and 1Ã—1020 atoms per cubic centimeter; and disposing an external circuit electrically conductive element in contact with a selected portion of said converted, metal catalyzed nano-sized graphitic flakes of sp2 Carbon.