Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)
- 2007.11a
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- Pages.398-398
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- 2007
Characteristic Analysis of Vertical Alignment by Ion-beam Irradiation Angle and Energy Density
이온빔 조사 각도와 에너지강도에 의한 수직 배향막의 특성 분석
- Kang, Dong-Hun (Yonsei Univ.) ;
- Oh, Byeong-Yun (Yonsei Univ.) ;
- Kim, Byoung-Yong (Yonsei Univ.) ;
- Han, Jin-Woo (Yonsei Univ.) ;
- Kim, Young-Hwan (Yonsei Univ.) ;
- Ok, Chul-Ho (Yonsei Univ.) ;
- Han, Jeong-Min (Yonsei Univ.) ;
- Lee, Sang-Keuk (Yonsei Univ.) ;
- Seo, Dae-Shik (Yonsei Univ.)
- 강동훈 (연세대학교) ;
- 오병윤 (연세대학교) ;
- 김병용 (연세대학교) ;
- 한진우 (연세대학교) ;
- 김영환 (연세대학교) ;
- 옥철호 (연세대학교) ;
- 한정민 (연세대학교) ;
- 이상극 (연세대학교) ;
- 서대식 (연세대학교)
- Published : 2007.11.01
Abstract
The Liquid Crystal (LC) alignment uniformity is very important in LC devices. The alignment mechanism of LC molecules on a rubbed polyimide (PI) surface is very important for both LC fundamental research and application. So, Generally a rubbing method to align LC has been widely used to mass-produce LCD panels. But because rubbing method is contact method between rubbing fabric and indium-tin-oxide glass or flexible substrate, rubbing method has some defects, such as the electrode charges and the creation of contaminating particles. Thus we strongly recommend a non-contact alignment technique for getting rid of some defects of rubbing method. Most recently, the LC aligning capabilities achieved by ion-beam exposure on the organic and nonorganic thin film surface have been reported successfully. In this research, we studied the tilt angle generation and electro-optical performances for a NLC on homeotropic polyimide surfaces with ion-beam exposure. The LC aligning capabilities of a nematic liquid crystal (NLC) on a homeotropic PI surface using a new ion-beam method were studied. On the homeotropic PI surface, the tilt angle of the NLC by exposure ion-beam had a tendency to decrease as increased ion-beam energy density. And, on the homeotropic PI surface, the alignment character of the NLC with respect to ion-beam energy was good. And we achieved satisfactory result for EO character.
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