Patent ID: 8816348
Filing Date: 2014-08-26
Classification: H01L

Abstract:
1. An integrated circuit comprising: (a) a substrate of a first conductivity type; (b) an epitaxial layer of said first conductivity type over said substrate, said epitaxial layer having a lower doping concentration than said substrate; (c) a trench MOSFET comprising a plurality of shielded trenched gates in said epitaxial layer, wherein: (d) a Schottky rectifier extending into said epitaxial layer and having a Schottky barrier layer lined in a trenched anode contact filled with a contact metal plug; (e) a Gate-Drain clamp diode comprising multiple back to back poly-silicon Zener diodes with alternating doped regions of said first conductivity type next to said second conductivity type, connected with said gate metal on one side, and with a drain metal on another side through a plurality of metal stripes cross over a termination area; and (f) a Gate-Source Clamp diode comprising multiple back to back poly-silicon Zener diodes with alternating doped regions of said first conductivity type next to said second conductivity type, connected with said gate metal on one side, and with said source metal on another side.