Physical DMOST modeling for high-voltage IC CAD

A physical, seminumerical charge-based model for vertical DMOSTs is developed and implemented in SPICE. The model is derived from regional quasi-static analyses of carrier transport which implicitly characterize the device currents and charges and which require numerical solution. Newton-Raphson iterative device solutions are derived within the circuit nodal analysis framework of SPICE. PISCES simulations and measurements of test devices support the model, which is demonstrated in DC and transient SPICE simulations of VDMOSTs and high-voltage integrated circuits (HVICs).>