Space Charge Formation in Polyimide Film under High DC Voltage at High Temperatures

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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: 2013/03/01タイトル(英語): Space Charge Formation in Polyimide Film under High DC Voltage at High Temperatures著者名: Tomoyuki Ishii (Tokyo City Unive rsity), Takamasa Takiwaki (Tokyo City University), Hiroaki Miyake (Tokyo City University), Yasuhiro Tanaka (Tokyo City University), Tatsuo Takada (Tokyo City University), Toshikatsu Tanaka (Waseda University)著者名(英語): Tomoyuki Ishii (Tokyo City University), Takamasa Takiwaki (Tokyo City University), Hiroaki Miyake (Tokyo City University), Yasuhiro Tanaka (Tokyo City University), Tatsuo Takada (Tokyo City University), Toshikatsu Tanaka (Waseda University)キーワード: space charge，pulsed electro-acoustic (PEA) method，polyimide，breakdown，insulating material要約(英語): Since polyimide (PI) film shows a good performance as a polymeric insulating material even at high temperatures, it is used for a flexible print-circuit board (PCB). Recently, the PCB is required to be reduced in its thickness for downsizing of the electronic devices. When the thickness of insulating layer becomes much thinner, however, the applied electric field to the layer becomes much higher, and then the possibility of electrical breakdown in the layer becomes higher. Therefore we need to investigate the breakdown characteristics of thin PI film. To investigate the breakdown mechanism in polyimide film under dc stress, we have focused on space charge accumulation. It is well-known that the space charge accumulation in some polymeric materials strongly affects the breakdown characteristics under dc stress. Especially in this study, we focused on the relationship between the moisture of the sample and the breakdown strength. Through some experimental results, it was found that a certain kind of space charge always accumulates in the bulk of the sample before the electric breakdown under dc high electric field. Furthermore, it was also found that the breakdown strength and the time-to-breakdown are strongly affected by the moisture in the sample.本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.133 No.3 （2013） 特集：2011 International Symposium on Electrical Insulating Materials本誌掲載ページ: 91-97 p原稿種別: 論文／英語電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/133/3/133_91/_article/-char/ja/ Show more