Patent ID: 6188111
Filing Date: 2001-02-13
Classification: H01L

Abstract:
A semiconductor device with a MOS transistor over a silicon substrate, comprising:a silicon substrate with a first insulator layer thereon;an oxide layer on said first insulator layer and with an opening extending vertically therethrough;a gate electrode in said opening and on said first insulator layer;a gate oxide film on said gate electrode and within said opening;a horizontally extended semiconductor layer containing source and drain regions that are on said oxide layer and a channel region that is between said source and drain regions and on said gate oxide film, said channel region having a horizontal width that is narrower than a corresponding width of said gate electrode so that said source and drain regions extend over respective edge portions of said gate electrode;a second insulator layer that is on said semiconductor layer; anda back gate wiring layer that is within said second insulator layer and that is over said channel region, said back gate wiring layer having a potential different from a potential of said gate electrode when the semiconductor device is operating to control a potential of said channel region.