The Mechanism of Charge Transfer in the Air Gap Between the Dielectric Films

Abstract

We have been interested in the research of the charge transfer mechanism between the dielectric surfaces through the narrow air gap. The electric potential differcnce V₁ induced in the air gap between the two dielectric films put inside of parallel electrodes is indlcated by the fo rmula (4) and found to be a function of the applied volage between electrodes V_a, gap length d₁, thicknesses and dielectric constants of the films, and potential of the surface charge to be transfered.
On the other hand, the spark voltage of the gap is shown by the well known Paschen's curve as the function of the product of d₁ and the pressure p (Fig. 2). smaller the p・d₁, V₁ will be enough to the spark when the charge densithy σ_s is high.
When the polarity of V_a is opposite to σ_s, V₁ is lower and we can reduce the gap and evacuate the system without spark. After then, if V₁ is increased we can determine whether spark potential at small p・d₁ fits the paschen's curve or not.
We have concluded, by this procedure, that the charge transfer ln the narrow gap between dielectric surfaces is done by the syark mechanism.