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

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

155

Lastpage

158

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 T_g (≑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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICSD.2001.955572

Filename

955572