The frequency dependent dielectric breakdown in some thin polymers

Author

Miyairi, Ken

Author_Institution

Dept. of Electr. Eng., Shinshu Univ., Nagano, Japan

Volume

3

fYear

2003

fDate

1-5 June 2003

Firstpage

949

Abstract

Dielectric breakdown of thin polyvinylcarbazole (PVK), polyimide (PI) and polymethyl methacrylate (PMMA) films prepared by vapor deposition polymerization or spin coating has been investigated for various ac voltages. The self-healing breakdown takes place at the peak of the applied voltage. The ac breakdown strength of these films decreases with temperature, and it increases with frequency in the range of 10Hz-3kHz except the case of PMMA in the high temperature range above 120°C. The gold electrodes give the lower breakdown strength than the aluminum electrode in PVK and PI films. The frequency dependent breakdown has been explained in terms of the field enhancement due to the hole space charge, which establishes the conductive path leading to the breakdown.

Keywords

dielectric thin films; electric breakdown; electric strength; polymer films; space charge; spin coating; vapour deposited coatings; 10 Hz to 3 kHz; 120 degC; ac breakdown strength; ac voltage; aluminum electrode; dielectric breakdown; gold electrodes; hole space charge; polyimide; polymethyl methacrylate; polyvinylcarbazole; spin coating; thin polymers; vapor deposition polymerization; Breakdown voltage; Chemical vapor deposition; Dielectric breakdown; Dielectric thin films; Electric breakdown; Electrodes; Frequency dependence; Polyimides; Polymer films; Temperature distribution;

fLanguage

English

Publisher

ieee

Conference_Titel

Properties and Applications of Dielectric Materials, 2003. Proceedings of the 7th International Conference on

ISSN

1081-7735

Print_ISBN

0-7803-7725-7

Type

conf

DOI

10.1109/ICPADM.2003.1218578

Filename

1218578