Patent ID: 7518190

Claim:
A structure comprising: a grounded bulk silicon substrate having a silicon-on-insulator (SOI) substrate thereover, the SOI substrate including a silicon-on-insulator (SOI) layer and a buried oxide (BOX) layer; a silicon active region having a plurality of finger elements within the SOI layer, each finger element separated from an adjacent finger element by a portion of a shallow trench isolation (STI) layer; a polysilicon ground intersecting the plurality of finger elements and extending through the STI layer and the BOX layer to the grounded bulk silicon substrate, the polysilicon ground contacting the silicon active region and the grounded bulk silicon substrate; and a barrier layer over the SOI layer, the polysilicon ground extending through the barrier layer, wherein the polysilicon ground includes a polysilicon filled trench, wherein the polysilicon ground contacts a sidewall of the silicon active region, and replaces a part of the STI layer between the plurality of finger elements.