Patent ID: 6740951
Filing Date: 2004-05-25
Classification: H01L

Abstract:
A Schottky rectifier, comprising:a semiconductor structure having first and second opposing faces each extending to define an active semiconductor region and a termination semiconductor region, said semiconductor structure comprising a cathode region of first conductivity type adjacent the first face and a drift region of said first conductivity type adjacent the second face, said drift region having a lower net doping concentration than that of said cathode region; a plurality of trenches extending from said second face into said semiconductor structure and defining a plurality of mesas within said semiconductor structure, at least one of said trenches being located in each of said active and said termination semiconductor regions; a first insulating region adjacent said semiconductor structure in said plurality of trenches; a second insulating region electrically isolating said active semiconductor region to said termination semiconductor region; and an anode electrode that is adjacent to and forms a Schottky rectifying contact with said semiconductor structure at said second face, said anode electrode being adjacent to said first insulating region in said trenches, and electrically connecting together said plurality of trenches.