Patent ID: 6303475
Filing Date: 2001-10-16
Classification: H01L,Y10S

Abstract:
A method of fabricating a silicon carbide power device comprising the steps of:masking a surface of a silicon carbide substrate to define an opening at the surface;implanting p-type dopants into the silicon carbide substrate through the opening at implantation energy and dosage that form a buried p-type implant;implanting n-type dopants into the silicon carbide substrate through the opening at implantation energy and dosage that form a surface n-type implant relative to the buried p-type implant;nonlinearly increasing the temperature of the silicon carbide substrate from room temperature to an annealing temperature of less that 1650.degree. C. sufficiently rapidly to prevent annealing of defects in the silicon carbide substrate; andannealing the buried p-type implant and the surface n-type implant at less than 1650.degree. C.