Teflon AF1600作为电润湿显示器件疏水绝缘层的可靠性研究  

The Reliability of Electrofluidic Display Devices Based on Teflon AF1600

作　　者：李显歌 白鹏飞[1] Rob Hayes 水玲玲[1] 吴昊[1] 窦盈莹 郭媛媛[1] 周国富[1,2] 

机构地区：[1]华南师范大学华南先进光电子研究院,彩色动态电子纸显示技术研究所,广州510006 [2]深圳市国华光电科技有限公司,深圳518110

出　　处：《华南师范大学学报（自然科学版）》2015年第2期17-20,共4页Journal of South China Normal University(Natural Science Edition)

基　　金：教育部"长江学者和创新团队发展计划"项目(IRT13064);广东省引进创新科研团队计划项目(2011D039)

摘　　要：以800 nm厚的Teflon AF1600作为疏水绝缘层,对其电润湿分段显示器进行了初步的可靠性研究.测试样品被长时间施加正电压脉冲,观察到2种现象:(1)显微镜下像素中有黑色圈状;(2)关闭电压后,油墨不能完全铺展于像素内.结果表明,显示器在长时间工作过程中性能(反射率、对比度)发生衰减.部分绝缘层区域在回流过程中引入杂质,长期加电后介电层被击穿,造成黑色坏点的产生并扩大.实验过程中电荷进入介质层中屏蔽外界电场导致显示性能的衰减.对不同驱动波形对显示器可靠性能的影响进行了初步的探究.By applying repeated actuations to the electrofluidic display devices based on Teflon AF1600 with a thickness of 800 nm,two failure modes were observed：（ 1） A dark circle across pixels;（ 2） partially closing,such as the oil film cannot fully recover at the off-state. The results indicated that the reflectivity and contrast decreased in long-term actuations. Partial area of the Teflon layer got contaminated in reflow process,and easily broken down after long-term actuations. This type of failure grew gradually with continuous actuation. Trapped charges in the insulating layer shield the electric field,weakening the electrowetting force and degrading the device performance. The effects of driving waveform on EFD performance have also been investigated.

关 键 词：电润湿显示 电荷捕获 驱动波形 

分 类 号：TN27[电子电信—物理电子学]