Patent ID: 7297626

Claim:
A pulsed laser ablation deposition process for forming at least one low specific contact resistance, (ρ c ) or less than 5.0×10 −5 Ω-cm 2 , thermally stable Ohmic contact on an n-type SiC substrate comprising: mounting an n-type SiC wafer substrate or n-SiC substrate with SiC epilayer in a vacuum chamber in a sample-substrate position; mounting a Ni 2 Si source target in said vacuum chamber separated from said n-type SiC wafer or n-SiC substrate with SiC epilayer by a sample-target gap; rotating the Ni 2 Si source target; ablating the Ni 2 Si source target by the use of a laser beam producing an intermetallic phase plasma plume; transferring said intermetallic phase Ni 2 Si plume to said n-type SiC substrate or n-SiC substrate with SiC epilayer; depositing said intermetallic phase Ni 2 Si plume as an Ni 2 Si film on said n-type SiC substrate or n-SiC substrate with SiC epilayer to form an Ni 2 Si-n-type SiC Ohmic contact; and rapid thermally annealing in an N 2 ambient for 30 seconds at 950° C.