A Generalized Ferroelectric Capacitor Modeling Methodology,

A generalized ferroelectric capacitor modeling methodology is presented from a theoretical basis through implementation in PSPICE. The approach postulates nonspecific sources of mobile charge as the source of nonideal hysteresis characteristics. These charges are modeled as depletion capacitances in an equivalent circuit model of the ferroelectric capacitor, capable of simulating both AC and DC behavior. A parameter extraction software package is presented, the use of which establishes that the model parameters may be fit to measured hysteresis data with a high degree of accuracy. PSPICE simulation results are then produced which demonstrate the ability to simulate hysteresis and switching behavior. These results may be correlated to measured data to identify specific physical phenomenon, and speed process and device design.