Patent ID: 7737522
Filing Date: 2010-06-15
Classification: H01L

Abstract:
1. A Schottky diode comprising: at least a trench opened in a semiconductor substrate doped with a dopant of a first conductivity type wherein a sidewall of said trench is lined with a Schottky barrier metal; a top doped region of a second conductivity type surrounding a top portion of said sidewalls of said trench to function as a reverse current shield for said Schottky diode; and a bottom doped region of said second conductivity type surrounding all bottom corners of said trench and extending over a substantial area below a bottom surface of said trench with substantial areas along sidewalls of said trench lined with said Schottky barrier metal directly contacting said semiconductor substrate doped with said first conductivity type for enhancing a forward current passing therethrough in a vertical direction along said trench.