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Polarity effect of breakdown characteristics across micrometer‐scale surface gap
Author(s) -
Iwabuchi Hiroyuki,
Oyama Tsutomu,
Kumada Akiko,
Hidaka Kunihiko
Publication year - 2021
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.23316
Subject(s) - breakdown voltage , miniaturization , polarity (international relations) , materials science , insulator (electricity) , micrometer , voltage , cathode , polarity symbols , electrode , electrical breakdown , electron , optoelectronics , electrical engineering , nanotechnology , optics , chemistry , physics , engineering , dielectric , biochemistry , quantum mechanics , cell
With a miniaturization of electrical devices, the gap between electrode becomes lower and lower. In order to optimize the insulation design, the understanding of breakdown phenomenon across micrometer‐scale gap is essential. In this study, breakdown characteristics across micrometer‐scale gap was investigated based on experiment and numerical simulation. The result shows that the breakdown voltage under positive voltage application is 1.5 times higher than the one under the negative voltage application. The polarity effect can be explained by the source of initial electrons. Under negative voltage application, the initial electrons are emitted from the cathode surface based on Fowler‐Nordheim equation. On the other hand, under positive voltage application, the insulator plays an important role on breakdown voltage.