Control of Pretilt Angle by UV exposure during Imidization of Polyimide for Homeotropic Alignment

수직 배향용 폴리미이드의 소성시에 UV 조사를 이용한 프리틸트각 제어

  • 황정연 (연세대학교 전기전자공학과) ;
  • 서대식 (연세대학교 전기전자공학과) ;
  • 한은주 (수원대학교 물리학과) ;
  • 갬재형 (인제대학교 물리학과)
  • Published : 2000.11.01

Abstract

Aligning capabilities of nematic liquid crystal(NLC) using an in-situ photo-alignment method with obliquely polarized UV exposure on a polyimide (PI) surface for homeotropic alignment were studied. The high angle for NLC can be measured by obliquely UV exposure of 30°on the PI surface for 10∼20 min. The pretilt angle of NLC generated using the in-situ photo-alignment was higher than that of a conventional photo-alignment method. Finally, we suggest that the control of pretilt angle in NLC with obliquely polarized UV exposure during imidization of the polymer for homeotropic alignment is promising method to generate high pretilt angle.