Surface and volume charge transport properties of polyimide revealed by surface potential decay with genetic algorithm

Daomin Min*, Mengu Cho, Arifur R. Khan, Shengtao Li

*この研究の対応する著者

研究成果: Article査読

41 被引用数 (Scopus)

抄録

It is very important to understand the surface and volume charge transportation properties of high insulating materials, such as polyimide, in order to find suitable method to mitigate the electrostatic discharge (ESD) of certain sensitive components on spacecraft. An isothermal surface potential decay (ISPD) experiment is performed inside a ground based vacuum chamber on polyimide under a simulated space environment. Immediately after low energy electron beam irradiation on polyimide, the 2D surface potential distributions are measured by a non-contact potential probe under five various temperatures from 298 to 338 K. The surface potential decay of the insulating material can be divided into two categories: transient process and steady state process. The steady state process is determined by the surface and volume charge transportation properties of dielectric. An ISPD model with genetic algorithm (GA) is developed to reveal the steady state surface potential decay experimental results. From the GA analysis, we obtain the surface resistivity, volume Ohmic resistivity, and charge carrier mobility of polyimide at various temperatures. After analyzing the surface and volume charge transportation properties of the material as a function of temperature, we find that the surface resistivity, volume Ohmic resistivity, and charge carrier mobility are well fitted with the Arrhenius law. Consequently, surface activation energy, volume activation energy, and trap energy of polyimide are found as 0.30 eV, 0.32 eV, and 0.54 eV, respectively.

本文言語English
論文番号6180255
ページ(範囲)600-608
ページ数9
ジャーナルIEEE Transactions on Dielectrics and Electrical Insulation
19
2
DOI
出版ステータスPublished - 2012 4月
外部発表はい

ASJC Scopus subject areas

  • 電子工学および電気工学

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