Experimental Study on Relationship Between Electride Approach Speed and Variation in the Amplitude of Electromagnetic Radiation due to ESD

摘要

Impulsive electromagnetic noise is caused by ESD. Especially, micro gap discharge of less than 1kV produces this noise of GHz. It is thought there is possibility this noise affects to various electrical systems. To solve EMC problems, we elucidated a mechanism which this noise occurs. We found that the amplitude of electromagnetic noise depends on the size of electrode and the voltage which is applied electrode. Therefore, we mainly measured the amplitude of electromagnetic noise when we changed the approach speed of electrode by this experiment. On the other hand, the voltage applied electrodes is constant. Then, the average amplitude tended to increase with the approach speed increases. The dispersion of the amplitude also increased with the speed became fast. On the other hand, the difference between the intermediate value of the amplitude and the average tended to decrease with the approach speed of electrode became fast.