ON CAPACITANCE CORRECTIONS FOR UNGUARDED DISC ELECTRODES

The edge capacitance corrections for thin unguarded disc electrodes pl aced on opposite faces of a dielectric sheet or film were computed by Wintle and Goad [1]. In their paper, they mention another calculation done by Sate and Zaengl using a surface charge simulation method that seemed to show some discontinuity between epsilon(2) = 1 and epsilon(2 ) = 2, where epsilon(2) is the dielectric constant of the insulator. I n this paper we have tried to reproduce the result with a different su rface charge simulation method, as well as a region-oriented charge si mulation approach and a finite element program in order to take a clos er look at the discrepancy.