Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)
- 2008.04a
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- Pages.43-43
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- 2008
Investigation of LC Alignment characteristic by Controlling Ion-beam Irradiation angles
이온빔 조사 각도에 따른 액정 배향 특성 연구
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Park, Hong-Gyu
(Yonsei University) ;
- Oh, Byeong-Yun (Yonsei University) ;
- Kim, Young-Hwan (Yonsei University) ;
- Kim, Byoung-Yong (Yonsei University) ;
- Han, Jin-Woo (Yonsei University) ;
- Chun, Ji-Yun (Yonsei University) ;
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Han, Jeong-Min
(Yonsei University) ;
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Seo, Dae-Shik
(Yonsei University)
-
박홍규
(연세대학교) ;
- 오병윤 (연세대학교) ;
- 김영환 (연세대학교) ;
- 김병용 (연세대학교) ;
- 한진우 (연세대학교) ;
- 전지연 (연세대학교) ;
-
한정민
(연세대학교) ;
-
서대식
(연세대학교)
- Published : 2008.04.25
Abstract
Recently, it is widely studied to liquid crystal (LC) alignment using ion-beam exposure. Because conventional rubbing method has some problems such as defects from dust and electrostatic charges and rubbing scratch during rubbing process. Moreover rubbing method needs cleaning process to remove these defects. Therefore rubbing-free techniques like ion-beam method are strongly required. We studied LC alignment by controlling ion-beam irradiation angles and electro-optical (EO) characteristics of twisted nematic LC on the polyimide surface. In this experiment, a good uniform alignment of the nematic liquid crystal (NLC) with the ion-beam exposure on the polyimide (PI) surface was observed. We also achieved low pretilt angle as function of ion-beam irradiation angles. X-ray photoelectron spectroscopic (XPS) analysis provided chemical evidence for LC alignment by controlling ion-beam irradiation angles. In addition, it can be achieved the good EO properties of the ion-beam-aligned twisted nematic liquid crystal display (TN-LCD) on PI surface. Some other experiments results and discussion will be included in the presentation.