This paper presents the surface modification and charge transportation mechanism of thin polyimide films. Here, we demonstrate that the surface modification of these films, by using the fluorine gas-phase, improves the charges mitigation and, thereafter, suppress the space charges. The experimental results indicate that the thermal step current for fluorine coated films reduce significantly in comparison to pure polyimide films. The thin layer of fluorine coating helps to release the surface charge, reduce the charge injection from the electrode, provide hindrance for charges to penetrate into the bulk of the films and the higher degree of charge disappearing helps to reduce the space charge growth.

中文翻译：

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电机表面改性定子线圈绝缘的电荷传输和俘获

本文介绍了聚酰亚胺薄膜的表面改性和电荷迁移机理。在此，我们证明了通过使用氟气相对这些膜进行表面改性，可以改善电荷缓和并抑制空间电荷。实验结果表明，与纯聚酰亚胺薄膜相比，氟涂层薄膜的热阶跃电流显着降低。氟涂层的薄层有助于释放表面电荷，减少从电极注入的电荷，为电荷渗透到大部分薄膜中提供了障碍，而更高程度的电荷消失则有助于减少空间电荷的增长。