Patent ID: 9178015
Filing Date: 2015-11-03
Classification: H01L

Abstract:
1. A termination structure for a semiconductor device, said termination structure comprising: a semiconductor substrate having an active region and a termination region; a plurality of trench cells located only in the termination region and extending from a boundary of the active region toward an edge of the semiconductor substrate; a termination trench formed in the termination region on a side of the plurality of trench cells remote from the active region; a conductive spacer located adjacent a sidewall of the termination trench nearest the plurality of trench cells; a first oxide layer formed in the termination trench and contacting a sidewall of the conductive spacer; a first conductive layer formed on a backside surface of the semiconductor substrate; a second conductive layer formed atop the active region and the termination region wherein the plurality of trench cells are filled with a conductive material up to a top surface of a plurality of mesas; wherein the second conductive layer extends from the active area as a continuous layer and completely covering the plurality of trench cells and at least a portion of the termination trench such that the second conductive layer, the conductive spacer and a field plate formed in the termination region are electrically coupled to one another.