Influence of the surface condition of electrodes on radiated EM field intensity due to micro gap discharge

The micro-gap discharge as the low voltage ESD shows very fast transition duration of about 32 ps or less. Besides, breakdown electric field strength between the gap was examined to corroborate the very fast transition durations of about 32 ps. Also, a relationship between the breakdown field strength in the gap and radiated electromagnetic field intensity was examined in experimental study. As a consequence of the experiment, the breakdown field strength in the gap was very high of about 80 MV/m in low voltage discharging of below 350 V. The relative radiated electromagnetic field intensity is proportion to the breakdown field strength in the gap. And so, the electrode surface conditions effect was confirmed that the relative electromagnetic field intensity has a cyclic variation with a cleaning of the electrode surface. The radiated electromagnetic field intensity was sudden increase just after the cleaning.