A Source Model and Experimental Validation for Electromagnetic Noises from Electrostatic Discharge Generator

Takeshi ISHIDA; Yukihiro TOZAWA; Mutsumu TAKAHASHI; Fengchao XIAO; Yoshio KAMI; Osamu FUJIWARA; Shuichi NITTA

doi:10.1587/transcom.E98.B.317

A Source Model and Experimental Validation for Electromagnetic Noises from Electrostatic Discharge Generator

Takeshi ISHIDA, Yukihiro TOZAWA, Mutsumu TAKAHASHI, Fengchao XIAO, Yoshio KAMI, Osamu FUJIWARA, Shuichi NITTA

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Electrostatic discharge (ESD) generators cause electromagnetic (EM) noises not only at ESD tests but also even before and after the tests. This may provide inconsistent test results, but the mechanism has not been well examined. To explain the mechanism qualitatively, we investigated a generation source model of EM noises from an ESD generator in conjunction with the functional control sequences of built-in relay switches and the DC high voltage power supply. To validate this model, we used a magnetic field probe to measure the induced EM noises before, during, and after contact and air discharges in accordance with the corresponding timing of the functional control sequences. As a result, we confirmed that the EM noises are induced when the relay switches operate before and at ESD testing and after ESD tests for both contact and air discharges. In addition, we found that the noise peaks due to contact discharges increase with charge voltages, and the peaks just before and at the testing are relatively larger than the ones after the tests, while the peaks of the induced noises at the air discharge testing do not always increase with charge voltages, but reach a maximum at 3kV. In addition, the peaks of the induced noises at the air discharge testing become smaller than either the peaks just before the testing and those after the tests at charge voltages above 6kV. This suggests that the EM noises just before ESD testing and after the test may cause the EUT to malfunction when air discharge tests with charge voltages over 6kV are conducted. A new control sequence of the built-in relay switch was also proposed for reducing the EM noises after ESD tests, which was validated through noise measurements.

Publication: IEICE TRANSACTIONS on Communications Vol.E98-B No.2 pp.317-323

Publication Date: 2015/02/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1587/transcom.E98.B.317

Type of Manuscript: PAPER

Category: Electromagnetic Compatibility(EMC)

Authors

Takeshi ISHIDA
  Noise Laboratory Co. LTD.,The University of Electro-Communications
Yukihiro TOZAWA
  Noise Laboratory Co. LTD.
Mutsumu TAKAHASHI
  Noise Laboratory Co. LTD.
Fengchao XIAO
  The University of Electro-Communications
Yoshio KAMI
  The University of Electro-Communications
Osamu FUJIWARA
  The University of Electro-Communications
Shuichi NITTA
  The University of Electro-Communications

Keyword

ESD generator, relay-switches, induced electromagnetic noises, source models, measurement

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Takeshi ISHIDA, Yukihiro TOZAWA, Mutsumu TAKAHASHI, Fengchao XIAO, Yoshio KAMI, Osamu FUJIWARA, Shuichi NITTA, "A Source Model and Experimental Validation for Electromagnetic Noises from Electrostatic Discharge Generator" in IEICE TRANSACTIONS on Communications, vol. E98-B, no. 2, pp. 317-323, February 2015, doi: 10.1587/transcom.E98.B.317.
Abstract: Electrostatic discharge (ESD) generators cause electromagnetic (EM) noises not only at ESD tests but also even before and after the tests. This may provide inconsistent test results, but the mechanism has not been well examined. To explain the mechanism qualitatively, we investigated a generation source model of EM noises from an ESD generator in conjunction with the functional control sequences of built-in relay switches and the DC high voltage power supply. To validate this model, we used a magnetic field probe to measure the induced EM noises before, during, and after contact and air discharges in accordance with the corresponding timing of the functional control sequences. As a result, we confirmed that the EM noises are induced when the relay switches operate before and at ESD testing and after ESD tests for both contact and air discharges. In addition, we found that the noise peaks due to contact discharges increase with charge voltages, and the peaks just before and at the testing are relatively larger than the ones after the tests, while the peaks of the induced noises at the air discharge testing do not always increase with charge voltages, but reach a maximum at 3kV. In addition, the peaks of the induced noises at the air discharge testing become smaller than either the peaks just before the testing and those after the tests at charge voltages above 6kV. This suggests that the EM noises just before ESD testing and after the test may cause the EUT to malfunction when air discharge tests with charge voltages over 6kV are conducted. A new control sequence of the built-in relay switch was also proposed for reducing the EM noises after ESD tests, which was validated through noise measurements.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E98.B.317/_p

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@ARTICLE{e98-b_2_317,
author={Takeshi ISHIDA, Yukihiro TOZAWA, Mutsumu TAKAHASHI, Fengchao XIAO, Yoshio KAMI, Osamu FUJIWARA, Shuichi NITTA, },
journal={IEICE TRANSACTIONS on Communications},
title={A Source Model and Experimental Validation for Electromagnetic Noises from Electrostatic Discharge Generator},
year={2015},
volume={E98-B},
number={2},
pages={317-323},
abstract={Electrostatic discharge (ESD) generators cause electromagnetic (EM) noises not only at ESD tests but also even before and after the tests. This may provide inconsistent test results, but the mechanism has not been well examined. To explain the mechanism qualitatively, we investigated a generation source model of EM noises from an ESD generator in conjunction with the functional control sequences of built-in relay switches and the DC high voltage power supply. To validate this model, we used a magnetic field probe to measure the induced EM noises before, during, and after contact and air discharges in accordance with the corresponding timing of the functional control sequences. As a result, we confirmed that the EM noises are induced when the relay switches operate before and at ESD testing and after ESD tests for both contact and air discharges. In addition, we found that the noise peaks due to contact discharges increase with charge voltages, and the peaks just before and at the testing are relatively larger than the ones after the tests, while the peaks of the induced noises at the air discharge testing do not always increase with charge voltages, but reach a maximum at 3kV. In addition, the peaks of the induced noises at the air discharge testing become smaller than either the peaks just before the testing and those after the tests at charge voltages above 6kV. This suggests that the EM noises just before ESD testing and after the test may cause the EUT to malfunction when air discharge tests with charge voltages over 6kV are conducted. A new control sequence of the built-in relay switch was also proposed for reducing the EM noises after ESD tests, which was validated through noise measurements.},
keywords={},
doi={10.1587/transcom.E98.B.317},
ISSN={1745-1345},
month={February},}

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TY - JOUR
TI - A Source Model and Experimental Validation for Electromagnetic Noises from Electrostatic Discharge Generator
T2 - IEICE TRANSACTIONS on Communications
SP - 317
EP - 323
AU - Takeshi ISHIDA
AU - Yukihiro TOZAWA
AU - Mutsumu TAKAHASHI
AU - Fengchao XIAO
AU - Yoshio KAMI
AU - Osamu FUJIWARA
AU - Shuichi NITTA
PY - 2015
DO - 10.1587/transcom.E98.B.317
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E98-B
IS - 2
JA - IEICE TRANSACTIONS on Communications
Y1 - February 2015
AB - Electrostatic discharge (ESD) generators cause electromagnetic (EM) noises not only at ESD tests but also even before and after the tests. This may provide inconsistent test results, but the mechanism has not been well examined. To explain the mechanism qualitatively, we investigated a generation source model of EM noises from an ESD generator in conjunction with the functional control sequences of built-in relay switches and the DC high voltage power supply. To validate this model, we used a magnetic field probe to measure the induced EM noises before, during, and after contact and air discharges in accordance with the corresponding timing of the functional control sequences. As a result, we confirmed that the EM noises are induced when the relay switches operate before and at ESD testing and after ESD tests for both contact and air discharges. In addition, we found that the noise peaks due to contact discharges increase with charge voltages, and the peaks just before and at the testing are relatively larger than the ones after the tests, while the peaks of the induced noises at the air discharge testing do not always increase with charge voltages, but reach a maximum at 3kV. In addition, the peaks of the induced noises at the air discharge testing become smaller than either the peaks just before the testing and those after the tests at charge voltages above 6kV. This suggests that the EM noises just before ESD testing and after the test may cause the EUT to malfunction when air discharge tests with charge voltages over 6kV are conducted. A new control sequence of the built-in relay switch was also proposed for reducing the EM noises after ESD tests, which was validated through noise measurements.
ER -