Patent ID: 8597998
Filing Date: 2013-12-03
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor device, comprising: forming a mask on a substrate having a top substrate surface; forming a gate trench in the substrate, through the mask; depositing gate material in the gate trench; removing the mask to leave a gate structure; implanting a body region; implanting a source region; forming a source body contact trench having a trench wall and a trench bottom; forming a plug in the source body contact trench, wherein the plug extends below a bottom of the body region; disposing conductive material in the source body contact trench, on top of the plug; disposing a conductive contact layer along at least a portion of the trench wall, wherein the conductive contact layer is in contact with at least a portion of the source region; and forming a drain; wherein: the conductive contact layer and the drain form a Schottky diode.