Patent ID: 9059213
Filing Date: 2015-06-16
Classification: H01L

Abstract:
1. A method of forming a semiconductor structure comprising: forming a deep trench in a semiconductor-on-insulator (SOI) substrate; forming a node dielectric directly on sidewalls of said deep trench; forming a conductive trench fill region on said node dielectric and completely filling said deep trench, wherein an active region in a top semiconductor layer of said SOI substrate does not contact said conductive trench fill region, and said active region is laterally spaced from said conductive trench fill region by said node dielectric; recessing said conductive trench fill region and said node dielectric within said deep trench, wherein a topmost surface of said node dielectric and a topmost surface of said conductive trench fill region are located above a topmost surface of a buried insulator layer after said recessing; and depositing a semiconductor material by selective epitaxy on an exposed surface of said active region and an exposed surface of said conductive trench fill region, wherein a raised source region is formed directly on said exposed surface of said active region and a raised strap region is formed directly on said exposed surface of said conductive trench fill region, and said raised source region contacts said raised strap region.