Patent ID: 10672883

Abstract:
A method for manufacturing a SiC mixed trench Schottky diode may include steps of providing a substrate and an epitaxial layer on top of the substrate; forming a plurality of trenches on a surface of the epitaxial layer; conducting ion implantation at a bottom portion of each trench; conducting ion implantation at sidewalls of each trench; forming an ohmic contact metal at a bottom portion of the Schottky diode; forming a Schottky contact metal on top of the epitaxial layer and in the trenches. In one embodiment, the substrate is an N+ type SiC and the epitaxial layer is an N− type SiC. In another embodiment, the step of forming a plurality of trenches on a surface of the epitaxial layer may include the step of etching the surface of the epitaxial layer by either dry etching or wet etching.