Model for the leakage current decay in high-field stressed Al/HfYOx/GaAs structures
A simple model for the leakage current decay in Al/HfYOx/GaAs structures subjected to constant voltage stress is presented. The model is based on a circuit representation of the so-called Curievon Schweidler (CS) law for dielectric degradation that can be easily extended to other metalinsulatorsemiconductor (MIS) structures exhibiting similar behavior. By means of the inclusion of effective series and parallel resistances the proposed approach allows to eliminate the singularities of the CS law at t=0 and t=? so that the final result corresponds to a power-law logistic currenttime characteristic.
mis oxide degradation curievon schweidler law