Patent ID: 9293376
Filing Date: 2016-03-22
CPC Classification: H01L

Claim Text:
1. An apparatus comprising: a first epitaxial layer over a first side of a substrate; a second epitaxial layer over the first epitaxial layer; a first drain/source contact plug formed over the second epitaxial layer, wherein the first drain/source contact plug is coupled to a first drain/source region, and wherein the first drain/source region is between the first drain/source contact plug and the second epitaxial layer; a second drain/source contact plug formed below a second side of the substrate, wherein the second drain/source contact plug is coupled to a second drain/source region, and wherein the first side is opposite to the second side; a trench formed in the first drain/source region, the second epitaxial layer and the first epitaxial layer, and extending from a top surface of the first drain/source region to a bottom portion of the first epitaxial layer, wherein a bottom surface of the trench is in direct contact with a top surface of the second drain/source region; a gate electrode in a lower portion of the trench; and a field plate surrounded by the gate electrode, wherein the field plate is electrically coupled to the second drain/source region, and wherein the second drain/source region is connected to the second drain/source contact plug through a low resistance path including the field plate.