Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Study of Liquid Crystal Alignment and Polarization-dependence on organic surface with slanted ion beam irradiation

유기절연막으로의 경사진 이온빔조사가 유기막 표면에서의 편광발생과 액정배향에 미치는 영향에 관한 연구

  • Han, Jeong-Min (Dept. of Electrical Engineering, Seoil Univ.) ;
  • Choi, Dae-Sub (Dept. of Electrical Engineering, Seoil Univ.) ;
  • Hwang, Jong-Sun (Dept. of New & Renewable Energy Electrical Engineering, Jeonnam Provincial College)
  • 한정민 (서일대학교 전기과) ;
  • 최대섭 (서일대학교 전기과) ;
  • 황종선 (전남도립대학 신재생에너지전기과)
  • Published : 2010.03.26
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Abstract

We used Brewster's Law to examine the mechanism of liquid crystal (LC) alignment on an organic insulation layer when subjected to ion-beam irradiation. Brewster's Law implies that the maximum rate polarized rayon a slanted insulation layers on the substrate and it illustrates the dependence of polarization and themechanical structure on the ion beam irradiation process. The pretilt angle of nematic LCs on the organic insulation surface was about $1.13^{\circ}$ for an ion beam exposure of $45^{\circ}$ for 1 minute at 1800eV. This shows the dependence of LC alignment on the polarization ratio in a slanted organic insulation layer. We also discussed the electro-optical characteristic of twisted nematic (TN) LCD using ion beam irradiation on organic overcoat layer.

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