Patent ID: 6078090
Filing Date: 2000-06-20
Classification: H01L

Abstract:
A trench-gated Schottky barrier diode comprising:a semiconductor body having first and second trenches formed at a surface thereof, said trenches being separated by a mesa, said mesa being doped with atoms of a first conductivity type;a metal layer in contact with at least a portion of a surface of said mesa, said metal layer being selected and said mesa being doped such that a rectifying Schottky interface is formed between said metal layer and said surface of said mesa;a gate electrode disposed within said trenches, said trenches being lined with a dielectric material such that said gate electrode is electrically insulated from said mesa; anda PN junction clamping diode formed in said semiconductor body, said clamping diode being fabricated in parallel with a current path through said mesa, wherein said PN junction is between a diffusion of a second conductivity type opposite to said first conductivity type and a region of the first conductivity type in said semiconductor body, said diffusion extending to a level deeper than said trenches.