Severity Evaluation of Immunity Test for Air and Contact Discharges of ESD Generators
An immunity test method for electrostatic discharges (ESDs) is being specified in the IEC 61000-4-2,in which two types of discharges,contact and air discharges of ESD generators (ESD-guns), are given.To achieve an immunity test of higher quality,severity evaluation of discharge currents for both the current injection methods is essential. In this study, to evaluate the severity of air and contact discharges of ESD-guns for immunity testing,using a 12-GHz digital oscilloscope,we measured discharge current waveforms for both the discharges of an ESDgun onto an IEC calibration target.In consideration of low voltage ESDs below several hundred volts, the charge voltages were set from 200V to 15kV despite the IEC test levels from 2kV to 15kV. For a severity evaluation index,we used maximum rising slopes (peak current divided by rise time) of the discharge currents, and obtained them with respect to charge voltages. As a result,we found that at charge voltages below 5kV, air discharges give current rising slopes higher than contact discharges do, and particularly at charge voltages below 1kV, the rising slopes double and also have smaller variation.This finding suggests that air discharges at charge voltages below 1kV can provide a severe and reproducible immunity test.
IEC immunity test ESD-gun air/contact discharges severity
Ikuko MORI Osamu FUJIWARA
Department of Electronic and Information Engineering,Suzuka National College of Technology,Mie,Japan Graduate School of Engineering,Nagoya Institute of Technology,Nagoya,Japan
国际会议
Asia-Pacific Conference on Environmental Electromagnetics CEEM2009(第五届亚太环境电磁学学术会议)
西安
英文
110-113
2009-09-16（万方平台首次上网日期，不代表论文的发表时间）