静電気放電耐性試験における微小ギャップを伴う放電電流の測定と現象考察

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2015/05/01

タイトル(英語): Measurements and Phenomenon Study on Discharge Currents with Small Gap in Electrostatic Discharge Immunity Test

著者名: 石田　武志（（株）ノイズ研究所／電気通信大学），肖　鳳超（電気通信大学），上　芳夫（電気通信大学），藤原　修（電気通信大学），仁田　周一（（株）ノイズ研究所／電気通信大学）

著者名(英語): Takeshi Ishida (Noise Laboratory Co., LTD./University of Electro-communications), Fengchao Xiao (University of Electro-communications), Yoshio Kami (University of Electro-communications), Osamu Fujiwara (University of Electro-communications), Shuichi Nitta (Noise Laboratory Co., LTD./University of Electro-communications)

キーワード: 静電気放電試験，接触放電，微小ギャップ，スパーク，放電電流　　electrostatic discharge test，contact discharge，small gap，spark，discharge current

要約(英語): In electrostatic discharge (ESD) immunity tests, it has empirically been known that contact discharge currents are enhanced by the existence of small air gaps between an ESD generator and equipment under test; however, its mechanism has not been well examined so far. In this study, to clarify the phenomena, we measured discharge currents through small air gaps from 30 µm to 1 000 µm in contact discharges of an ESD generator to an IEC current calibration target. As a result, we found that multiple current peaks appear depending on the gap length and test voltage as well, which are unlikely to occur in conventional contact discharge tests. It was also found that the contact discharge current with a small gap provides a faster rise time and larger current peak in comparison with normal contact discharge tests even at the same test voltage. A circuit approach was used to qualitatively explain the peculiar finding and revealed that the stray capacitances of the discharge electrode are first charged by a contact discharge test and then the accumulated charges are abruptly discharged due to the spark that occurs across a small gap, which gives faster rise time and larger current peaks.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.135 No.5 （2015） 特集：2014年環境電磁工学国際シンポジウム（EMC 2014/Tokyo）

本誌掲載ページ: 287-293 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/135/5/135_287/_article/-char/ja/