Patent ID: 7932536

Claim:
A method of manufacturing a semiconductor rectifier device, the method comprising: depositing an N-drift region on an N++ substrate; implanting boron into the N-drift region to create a P-body layer; forming a plurality of trenches within the P-body layer, the trenches forming a plurality of P-body regions; forming a dielectric layer within each trench of the plurality of trenches; depositing conductive gate material to fill a remaining volume within each trench of the plurality of trenches; etching back the conductive gate material to form a planar surface above the plurality of P-body regions; depositing a layer of titanium and a layer of titanium nitride on the planar surface; annealing to create a layer of titanium silicide at an interface between the plurality of P-body regions and the titanium layer, and in accordance therewith, forming a δp++ layer.