A Computationally Efficient Compact Model for Ferroelectric Switching With Asymmetric Nonperiodic Input Signals

Abstract

In this paper, we develop a Verilog-A implementable compact model for the dynamic switching of ferroelectric Fin-FETs (Fe-FinFETs) for asymmetric non-periodic input signals.We use the multi-domain Preisach Model to capture the saturated P − E loop of the ferroelectric capacitors. In addition to the saturation loop, we model the history dependent minor loop paths in the P − E by tracing input signals' turning points. To capture the input signals' turning points, we propose an R − C circuit based approach in this work. We calibrate our proposed model with the experimental data, and it accurately captures the history effect and minor loop paths of the ferroelectric capacitor. Furthermore, the elimination of storage of each turning point makes the proposed model computationally efficient compared with the previous implementations. We also demonstrate the unique electrical characteristics of Fe-FinFETs by integrating the developed compact model of Fe-Cap with the BSIM-CMG model of 7nm FinFET.

Physics-Based Modeling of Ferroelectric Hysteresis for Ceramic Capacitors in Inductively Coupled Microstimulators

“…The Preisach theory, originally used to model the hysteresis of ferromagnetic materials, has been used in [32][33][34][35][36] to develop a model for ferroelectric materials. Such models can be easily implemented into other models and are computationally efficient [33].…”

“…The Preisach theory, originally used to model the hysteresis of ferromagnetic materials, has been used in [32][33][34][35][36] to develop a model for ferroelectric materials. Such models can be easily implemented into other models and are computationally efficient [33]. However, due to the phenomenological nature of those models, the dynamic domain switching is either neglected [32,36] or reproduced by time constants [34,35].…”