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Silicon nanowire FET (SiNWFET) with dynamic polarity control has been experimentally demonstrated and has shown large potential in circuit applications. To fully explore its circuit-level opportunities, a physics-based compact model of the polarity-controllable SiNWFET is required. Therefore, in this paper, we extend the solution for conventional SiNWFETs to polarity-controllable SiNWFETs. By solving...
The VDMOS physical modeling method is studied, and then a VDMOS physical model is proposed for IC CAD. In this model, for the region whose cross-section area of electron flow is variable, a differential equation for the vertical electric field, which considers the high electric field's strong influence on the electron mobility, is established. Moreover, when the nonuniform electron concentration distribution...
In this paper an analytic channel potential-based model is proposed to predict the dynamic depletion behavior of surrounding-gate (SRG) MOSFETs with arbitrary doping level. The key input voltage equation is derived out by solving Poisson's equation approximately with arbitrary doping in the cylindrical coordinate. Combined with the surface-centric potential relationship, the electrostatic potential...
In this paper an analytic model for Ge/Si core/shell nanowire MOSFETs (NWFETs) is developed. First, the electrostatic potential and charge model are derived out from classical device physics. Then the drift-diffusion drain current model is obtained and verified by comparisons with the numerical simulation. The ballistic current model is obtained with the approximately described quantum-mechanical...
This paper presents a charge-based compact model for the arbitrary doped long-channel cylindrical surrounding-gate (SRG) MOSFETs. Starting from Poissonpsilas equation with fixed charge and inversion charge terms, an accurate equation of inversion charge is obtained with the full-depletion approximation. Substituting this inversion charge expression into Pao-Sahpsilas dual integral, a drain current...
A complete surface potential-based current-voltage and capacitance-voltage core model for cylindrical undoped surrounding-gate (SRG) MOSFETs is presented in this paper. This model allows the current-voltage (IV) and capacitance-voltage (CV) characteristics to be adequately described by a single set of the equations in terms of the surface potential. The model is valid for all operation regions and...
A charge-based silicon nanowire FET (SNWT) compact model has been developed. For the first time, inversion charge of SNWT with arbitrary doping concentration is described by an accurate equation including the effects of doping and volume inversion. Analytic drain current, transconductance, output conductance, terminal charges and capacitance are all physically derived and compared with numerical simulation...
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