Patent ID: 7138291
Filing Date: 2006-11-21
Classification: H01L,Y10S

Abstract:
1. A method of treating a silicon carbide substrate for improved epitaxial deposition suitable for use as a precursor in the manufacture of light emitting diodes, the method comprising: forming a capping layer on the first surface of a conductive silicon carbide wafer from a material that can be controllably deposited in thin layers, that is susceptible to implementation with dopant suitable for doping silicon carbide, can be implanted with ions having the same conductivity as the silicon carbide wafer, and can be removed without substantially damaging the underlying surface of the wafer; implanting dopant atoms having the same conductivity type as the silicon carbide wafer into and through the capping layer and into the silicon carbide wafer at one or mare predetermined dopant concentrations and implant energies to form a dopant profile; annealing the implanted wafer; removing the capping layer; and growing a semiconductor epitaxial layer on the implanted first surface of the substrate wafer.