Patent ID: 8907414
Filing Date: 2014-12-09
Classification: H01L

Abstract:
1. A trench diode comprising: an epitaxial layer of a first conductivity type; a barrier layer of the first conductivity type formed above the top surface of the epitaxial layer; a top-layer of a second conductivity type formed above the top surface of the barrier layer; one or more trenches formed through the top-layer and the barrier layer, wherein a conductive material is disposed in the trenches with a dielectric material lining the trenches between the conductive material and sidewalls of the trenches; a contact pocket formed in an upper portion of the top-layer, wherein the contact pocket is of the second conductivity type, and wherein a doping concentration of the contact pocket is greater than a doping concentration of the top-layer; and an electrically floating pocket formed underneath the contact pocket, wherein the floating pocket is of the first conductivity type.