Patent ID: 8198687
Filing Date: 2012-06-12
Classification: H01L

Abstract:
1. A structure that includes a rectifier, the structure comprising: a semiconductor region of a first conductivity type; trenches extending into the semiconductor region; a dielectric layer lining lower sidewalls of each trench but being discontinuous along a bottom of each trench; a silicon region of a second conductivity type extending along the bottom of each trench and forming a PN junction with the semiconductor region, wherein the second conductivity type is opposite the first conductivity type; a shield electrode in a bottom portion of each trench, the shield electrode being in direct contact with the silicon region; a gate electrode over the shield electrode; and an interconnect layer extending over the semiconductor region and being in electrical contact with the shield electrode, wherein the interconnect layer contacts mesa surfaces of the semiconductor region between adjacent trenches to form Schottky contacts therebetween.