Patent ID: 8816468
Filing Date: 2014-08-26
Classification: H01L

Abstract:
1. A semiconductor rectifier, comprising: a semiconductor substrate having a first type of conductivity; a first layer formed on the substrate having the first type of conductivity and being more lightly doped than the substrate; a second layer formed on the substrate having a second type of conductivity, said second type of conductivity being opposite to said first type of conductivity; a metal layer disposed directly over the second layer, wherein the second layer is lightly doped so that a Schottky contact is formed between the metal layer and the second layer; a first electrode formed over the metal layer and a second electrode formed on a backside of the substrate; at least one trench formed in the first layer; a dielectric layer lining a bottom and sidewalls of the at least one trench; and a conducting material filling the at least one trench,