Effect of the shapes of metal electrodes on ESD current and radiation noise

Abstract

In this study, we measure the discharge current and their radiation noise of ESD from charged metal to investigate the effect of the shapes of the metal electrodes. The ESD in this study is approaching and gaseous discharge with gap control. The radius of curvature of the high voltage (± 6 kV) electrode is 10 types vary from 0.18 mm to 15 mm. From experimental results, it is found that the radius of curvature of the electrode affects the shape of discharge current, gap length of discharge inception, and their radiation noise, even if the applied voltage is the same. The radius is bigger, the gap length is narrower and the wavefront of the current is impulsive and their radiation noise is strong. The radius is smaller, the gap length is wider and the wavefront of the current is moderate.