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Conduction Current Characteristics and Carrier Mobility of Both Original and Corona-Resistant Polyimide Films |
| ZHANG Pei-Hong;FAN Yong;WANG Fo-Chi;XIE Hua;LI Gang;LEI Qing-Quan |
| College of Electrical & Electronic Engineering, Harbin University of Science and Technology, Harbin 150040 |
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| Cite this article: |
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ZHANG Pei-Hong, FAN Yong, WANG Fo-Chi et al 2005 Chin. Phys. Lett. 22 1253-1255 |
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Abstract The electric conduction current characteristics of both Dupont original and corona-resistant polyimide films (100HN and 100CR) before and after corona-aging eight hours under electric field of 10kV/mm and 20kV/mm were measured. The results show that the conduction current of 100CR is about one order of magnitude larger than that of 100HN. Based on the space charge aging theory, the electric degradation threshold obtained from the space charge limit current plot is 40kV/mm for 100CR and 35kV/mm for 100HN, and decreases with the increasing corona-aged field. By measuring the depolarization current of the two films at 170°C, it is observed that the decay of depolarization current of 100CR is faster than that of 100HN. Based on the depolarization current curve, the apparent carrier mobility and trap depth of 1.2×1013,m3/Vs to 3×1014m2/Vs and 1.052eV to 1.105eV for 100CR, 1.12×1013m2/Vs to 8×10-14m2/Vs and 1.054eV to 1.069eV for 100HN were, respectively, calculated during depolarizing.
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| Keywords:
78.30.Jw
72.20.Ht
72.20.Fr
73.20.Hs
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Published: 01 May 2005
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