Profiling border-traps by TCAD analysis of multifrequency CV-curves in Al2O3/InGaAs stacks

Abstract

This paper reports physics based TCAD simulations of multi-frequency C-V curves of In0.53Ga0.47As MOSCAPs including the AC response of the border traps. The calculations reproduce the experimental inversion and accumulation capacitance versus frequency, and provide a means to profile the space and energy density of states of border traps. A sensitivity analysis of the results to border traps' distribution is carried out changing the trap volume and the oxide capacitance.