Patent ID: 9087899
Filing Date: 2015-07-21
Classification: H01L,H03K

Abstract:
1. An accumulated charge control (ACC) floating body metal-oxide-semiconductor field effect transistor (MOSFET) comprising: a gate; a drain; a source; a body, wherein the body comprises a gate modulated conductive channel between the source and the drain; a gate oxide layer positioned between the gate and the body; and an accumulated charge sink (ACS) region operatively coupled to the body, wherein the ACS region comprises an implant region disposed within or adjacent the body; wherein accumulated charge is present in the body of the floating body MOSFET when the MOSFET is biased to operate in an accumulated charge regime and wherein accumulated charge is removed or controlled by applying a bias voltage to the ACS region, wherein the gate modulated conductive channel, source, and drain have carriers of identical polarity when the MOSFET is biased to operate in an on-state and wherein the MOSFET operates in the accumulated charge regime when the MOSFET is biased to operate in a off-state and when the accumulated charge has a polarity that is opposite to the polarity of the source, drain, and gate modulated conductive channel, and wherein the MOSFET has an operational body to gate bias voltage and the ACS region has parasitic MOS capacitance turned on at a body to gate bias voltage threshold and wherein the implant region is doped with selected dopant materials and at selected dopant levels to provide that the parasitic MOS capacitance is turned on at a body to gate bias voltage threshold less than or greater than the operational body to gate bias voltage.