Distance Characteristics of Transient Electric Field Strength Caused by ESD in a Pair of Spherical Electrodes

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  • 球電極対のESDに伴って発生する過渡電界強度の距離特性

Abstract

Impulsive wideband electromagnetic (EM) noise occurs from ESD (Electrostatic Discharge). The transient EM noise is an awkward problem that causes equipment malfunctions and failures. Therefore, in order to experimentally confirm the validity of the radiation model for discussing the mechanism of EM noise radiation by ESD, the distance characteristic of the electric field peak value caused by ESD in a pair of spherical electrodes is examined using a wideband optical field probe. As a result, the field peak value attenuates according to cube of the distance in close vicinity to the discharge gap, and attenuates according to square and reciprocal of the far distance. This result confirms that the EM field radiation caused by ESD in the pair of spherical electrodes can be explained by using the short dipole model.

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