Patent ID: 6268630
Filing Date: 2001-07-31
Classification: H01L

Abstract:
A silicon-on-insulator field-effect transistor, comprising:(a) a silicon-on-insulator wafer further comprising:a monocrystalline silicon substrate;an insulating layer of silicon dioxide overlying the silicon substrate; anda monocrystalline silicon device layer overlying the insulating layer;(b) a gate formed above the device layer;(c) a multiply-doped drain formed on one side of the gate in the device layer and extending completely through the device layer, the drain further comprising a first lightly-doped portion formed with a first width and extending only partially through the device layer, with the first lightly-doped portion partially overlapping and extending laterally beyond a first heavily-doped portion that extends downward completely through the device layer;(d) a multiply-doped source formed on the other side of the gate in the device layer and extending only partially through the device layer, the source further comprising a second lightly-doped portion and a second heavily-doped portion partially overlapping the second lightly-doped portion; and(e) a body tie contact formed adjacent to the source and electrically connected to the source.