Abstract
We report on p and n-type vertical gate-all-around (GAA) nanowire (NW) and nanosheet (NS) FETs which offer attractive opportunities for ultra-scaled circuits. An in-depth evaluation is presented on the impact of doping and key device dimensions to improve the performance, variability, noise and reliability behavior for junctionless (JL) vs. inversion-mode (IM) vertical FETs built with an RMG scheme. The latter enables a novel concept to introduce stress in VFETs for enhanced mobility with up to a19% higher I <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">ON</sub> predicted. SiGe/Si pillars and self-aligned spacers offer a solution to gate vertical (mis)alignment towards the S/D. As MRAM selector, VNS FETs can allow substantial area reduction (64% for 2VNS per cell; 3nm node design rules) vs. finFET based cells, with smaller read/write energy consumption and latency times.
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