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Two-dimensional models for quantum effects on short channel electrostatics of lightly doped symmetric double-gate MOSFETs

Two-dimensional models for quantum effects on short channel electrostatics of lightly doped symmetric double-gate MOSFETs

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Analytical Verilog-A compatible 2D model including quantum short channel effects and confinement for the potential, threshold voltage and the carrier charge sheet density for symmetrical lightly doped double-gate metal-oxide-semiconductor field effect transistors (MOSFETs) is developed. The proposed models are not only applicable to ultra-scaled devices but they have also been derived from 2D Poisson and 1D Schrödinger equations including 2D electrostatics, in order to incorporate quantum mechanical effects. Electron and hole quasi-Fermi potential effects were considered. The models are continuous and have been verified by comparison with COMSOL and BALMOS numerical simulations for channel lengths down to 7 nm at 1 nm oxide thicknesses; very good agreement within ±5% has been observed for silicon thicknesses down to 3 nm.

http://iet.metastore.ingenta.com/content/journals/10.1049/iet-cds.2017.0046
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