On the Influence of Ionic Polarization of Transistor Si-Structures on the Conductivity of p-Type Channels

摘要

In the range of transverse magnetic field induction values of 0-4.5 T at temperatures of 100-200 K, the conductivity of the inversion channel of transistor Si-structures is measured after ion polarization and depolarization of samples. It was found that during polarization at a temperature of 420 K under the action of a strong electric field, around 6.5 x 10(11) cm(-2) ions flowed in the oxide. It was found that, up to the channel opening threshold, conductivity in the source-drain circuit is achieved due to thermal activation of charge carriers to the leakage level in the unordered potential created by the chaotic distribution of ions along the semiconductor surface. It is shown that after opening of the channel (intersection of the Fermi level of holes on the semiconductor surface with the flow level in the chaotic potential), ions appear in the conductivity as additional scattering centers; therefore, in a polarized state, the effective channel mobility is less than in the depolarized one.