Patent ID: 7855384
Filing Date: 2010-12-21
Classification: H01L

Abstract:
1. A SiC semiconductor device comprising: a SiC substrate including a drain layer having a first conductive type, a drift layer having the first conductive type and a source layer having the first conductive type, wherein the drain layer, the drift layer and the source layer are stacked in this order; a plurality of trenches, each of which penetrates the source layer and reaches the drift layer; a gate layer having a second conductive type and disposed on a sidewall of each trench, wherein a part of the drift layer sandwiched between the gate layer on the sidewalls of adjacent two trenches provides a channel region; an insulation film disposed on the sidewall of each trench for covering the gate layer; a source electrode disposed on the source layer; and a diode portion disposed in each trench and/or under each trench and contacting the drift layer to provide a diode, wherein the diode portion is electrically coupled with the source electrode, and electrically insulated from the gate layer with the insulation film on the sidewall of each trench; the diode portion includes a Schottky electrode made of metal, and the Schottky electrode and the drift layer provide a Schottky junction so that the diode portion provides a Schottky diode.