Control of High Pretilt Angle Using the Photodimerization Method on the Photo-Crosslinkable Polymide Based Polymer

광중합 가능한 폴리이미드계 폴리머의 광중합법을 이용한 고프리틸트각의 제어

  • 황정연 (연세대학교 전기전자공학과) ;
  • 서대식 (연세대학교 전기전자공학과) ;
  • 이상렬 (연세대학교 전기전자공학과) ;
  • 김재형 (인제대학교 물리학과)
  • Published : 2001.04.01

Abstract

We synthesized a photo-crosslinkable polymide (polymide (PI)-chalcone-biphenyl (BP)) based polymer and control of pretilt angle for a nematic liquid crystal (NLC) using two kinds of the photodimerization methods by polarized UV exposure the photopolymer surfaces was studied. Pretilt angle of the NLCs using a conventional photodimerization method could be varied between 0$^{\circ}$ and 3$^{\circ}$, by controlling the condition of UV exposure. Pretilt angle of the NLCs using the conventional photodimerization method was higher than a in-situ photodimerization method.

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