Title :
Influence of ionic impurities on the AC breakdown and its frequency dependence in the polymer thin film
Author :
Miyairi, Keiichi ; Itoh, Eiji
Author_Institution :
Dept. Of Electr. & Electron. Engineenng, Shinshu Univ., Nagano, Japan
fDate :
6/23/1905 12:00:00 AM
Abstract :
In this study, we investigated the AC breakdown strength of poly (N-vinylcarbazole) (PVCz) and poly(methyl methacrylate) (PMMA) thin films sandwiched with two metal electrodes at the frequencies between 10Hz- 3kHz. We then investigated the influence of ionic impurity doping such as LiClO4 on the AC breakdown properties in PMMA films. It was found that the electrical strength of AC breakdown increased with the increment of the frequencies and decreased with the increment of temperature especially at the temperatures between 30 and 200°C for PVCz films and at the temperatures between 30 and below Tg (≑110°C) for PMMA films. It was also found that the AC breakdown strength decreased significantly for the doping of LiClO4 larger than 2wt% probably due to the accumulation of hetero-ionic space charges at the electrode/film interface
Keywords :
electric breakdown; electric strength; impurity distribution; polymer films; space charge; 10 Hz to 3 kHz; 30 to 200 degC; AC breakdown; LiClO4; electrical strength; electrode/film interface; hetero-ionic space charges; ionic impurity doping; poly (N-vinylcarbazole); poly(methyl methacrylate); polymer thin film; Breakdown voltage; Electric breakdown; Frequency dependence; Gold; Impurities; Low voltage; Polymer films; Temperature dependence;
Conference_Titel :
Solid Dielectrics, 2001. ICSD '01. Proceedings of the 2001 IEEE 7th International Conference on
Conference_Location :
Eindhoven
Print_ISBN :
0-7803-6352-3
DOI :
10.1109/ICSD.2001.955572
