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Control of High Pretilt Angle in NLC using a NDLC Thin Film

NDLC 박막을 이용한 네마틱 액정의 고프리틸트 제어

  • 박창준 (연세대학교 전기전자공학과) ;
  • 황정연 (연세대학교 전기전자공학) ;
  • 서대식 (연세대학교 전기전자공학) ;
  • 안한진 (연세대학교 금속공학) ;
  • 김경찬 (연세대학교 금속공학) ;
  • 백홍구 (연세대학교 금속공학과)
  • Published : 2004.07.01

Abstract

We studied the nematic liquid crystaL(NLC) aligning capabilities using the new alignment material of a nitrogenated diamond-like carbon(NDLC) thin film. The NDLC thin film exhibits high electrical resistivity and thermal conductivity that are similar to the properties shown by diamond-like carbon (DLC) thin films. The diamond-like properties and nondiamond-like bonding make NDLC an attractive candidate for applications. A high pretilt angle of about 9.9$^{\circ}$ by ion beam(IB) exposure on the NDLC thin film surface was measured. A good LC alignment is achieved by the IB alignment method on the NDLC thin films surface at annealing temperature of 200 $^{\circ}C$. The alignment defect of the NLC was observed above annealing temperature of 250 $^{\circ}C$. Consequently, the high pretilt angle and the good LC alignment by the IB alignment method on the NDLC thin film surface can be achieved.

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