VARIATION OF TRAPPING DETRAPPING PROPERTIES AS A FUNCTION OF THE INSULATOR SIZE

Using the scanning electron microscope we have investigated the physic al parameters determining the size effect of various dielectric sample s submitted to a surface electric field. It is shown that the size eff ect is a function of the static permittivity and of the space charge d istribution. The results are explained by the consideration of charge diffusion and polarization relaxation processes resulting from the spa ce charge formation. A one-dimensional mathematical model has also bee n used to describe space charge distribution. The findings were consis tent with the experimental observations.