Abstract
A new type of vertical nanowire (VNW)/nanosheet (VNS) FETs combining a horizontal channel (HC) with bulk/back-gate electrode configuration, including Bulk-HC and FD-SOI-HC VNWFET, is proposed and investigated by TCAD simulation. Comparisons were carried out between conventional VNWFET and the proposed devices. FD-SOI-HC VNWFET exhibits better I on/I off ratio and DIBL than Bulk-HC VNWFET. The impact of channel doping and geometric parameters on the electrical characteristic and body factor (γ) of the devices was investigated. Moreover, threshold voltage modulation by bulk/back-gate bias was implemented and a large γ is achieved for wide range V th modulation. In addition, results of I on enhancement and I off reduction indicate the proposed devices are promising candidates for performance and power optimization of NW/NS circuits by adopting dynamic threshold voltage management. The results of preliminary experimental data are discussed as well.
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