Study of unusual conduction in FEP film

In the dielectrics the current decays with time to steady state. The absorbing current can be caused either from relaxation process of dipole or transport process of space charge. Common point of view is that leakage current is characterized by the steady state. And in some dielectrics unusual conductive phenomenon is observed, i.e., change of current with time is an increasing function. This phenomenon was observed in the ceramic materials (Ref.1). In our work we have observed unusual conduction in FEP film. For the polymer as insulant, studies of movement, trapping and disappearance of heterocharge, introduced during production processing and of homocharge, transferred from the metal, will be of value, because they have influence on the dielectric properties.