Patent ID: 6998694
Filing Date: 2006-02-14
Classification: H01L

Abstract:
1. A power rectifier device, comprising: a semiconductor substrate having a first conductive layer doped with first-type impurities, an epi layer formed thereon which is extended to a first surface thereof and is lightly doped with said first-type impurities; a cathode metal layer formed on said first conductive layer opposite said first surface; a first oxide layer formed on said first surface; a nitride layer formed on said first oxide layer; a pair of trenches formed through said nitride layer and said first oxide layer and extending into a top portion of said epi-layer and spaced from each other by a first mesa region; a termination mesa region surrounding said pair of trenches; a second conductive type doped region formed into said epi layer of said first mesa region and said termination mesa region, wherein said first mesa region and said termination mesa region are regions located on said first surface having said first oxide layer formed thereon; a Schottky barrier silicide layer formed on said epi layer located on bottom and side surfaces of said trenches; a top metal layer acting as an anode and formed on said Schottky barrier silicide layer and extended to cover all surfaces of said first mesa region and a portion of said termination mesa region.