Patent ID: 11916117
Assignee: DIODES INCORPORATED
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor Schottky device, comprising:
a semiconductor substrate and a semiconductor epitaxial layer over the semiconductor substrate;
an anode contact structure and a cathode contact structure both extending from a top surface of the semiconductor epitaxial layer;
the cathode contact structure having a trench structure into the semiconductor epitaxial layer with a vertical sidewall of the semiconductor epitaxial layer;
a polysilicon element disposed in an upper portion of a sidewall of the trench structure;
a first metal silicide film in contact with and electrically coupled to the semiconductor epitaxial layer in a lower portion of the sidewall of the trench structure and in direct contact with the polysilicon element and in contact with the semiconductor substrate at a bottom of the trench structure, the first metal silicide film being connected to the cathode contact structure; and
a Schottky contact disposed between a second silicide layer and the semiconductor epitaxial layer, the Schottky contact connected to the anode contact structure.