Patent ID: 9627552
Date: 2017-04-18
CPC Classifications: H01L

Claim:
1. A method for fabricating a diode, said method comprising: forming a Schottky contact on an epitaxial layer of silicon carbide (SiC) wherein a ring termination region is formed in said epitaxial layer of silicon carbide (SiC) below a passivation layer, and wherein said Schottky contact comprises a layer of molybdenum (Mo); annealing said Schottky contact at a temperature in the range of 300° C. to 700° C.; forming an ohmic contact that contacts said passivation layer and said Schottky contact and overlies portions of said ring termination region; forming a layer of amorphous silicon that has a top surface that fully lies underneath and contacts a bottom surface of said ohmic contact and a side surface of said passivation layer wherein at least a portion of said bottom surface of said ohmic contact lies above a structure other than said amorphous silicon; and forming a polyimide layer over said layer of amorphous silicon and over said Schottky contact wherein said layer of amorphous silicon contacts portions of said Schottky contact.