한국정보디스플레이학회:학술대회논문집

The Korean Infomation Display Society (한국정보디스플레이학회)
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Alignment of Nematic Liquid Crystals on Polyimide Surface Bombarded by $Ar^+$ Beam

  • Gwag, Jin-Seog (Department of Electronics Engineering, Pusan National University) ;
  • Lee, Seo-Hern (Department of Electronics Engineering, Pusan National University) ;
  • Park, Kyoung-Ho (Department of Electronics Engineering, Pusan National University) ;
  • Park, Won-Sang (Department of Electronics Engineering, Pusan National University) ;
  • Han, Kwan-Yougn (Department of Electronics Engineering, Pusan National University) ;
  • Yoon, Tae-Hoon (Department of Electronics Engineering, Pusan National University, Research Institute of Computer, Information and Communication, Pusan National University) ;
  • Kim, Jae-Chang (Department of Electronics Engineering, Pusan National University, Research Institute of Computer, Information and Communication, Pusan National University) ;
  • Kim, Hee (Department of Physics, Kyungsung University) ;
  • Cho, Seong-Jin (Department of Physics, Kyungsung University)
  • Published : 2002.08.21
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Abstract

We found that polyimide surfaces bombarded by a low energy argon ion beam align liquid crystals. The pretilt angle of the liquid crystals is controlled by ion beam parameters, such as the energy of the incident ions, the angle of incidence, exposure time and current density. The alignment direction of liquid crystal on substrates corresponded to ion beam direction. By argon ion beam the pretilt angle of the liquid crystals was controlled between $0.5^{\circ}$ and $4^{\circ}$for SE-3140 under the proper conditons. By the atomic force microscope (AFM), polyimide surfaces before and after bombarded by ion beam are compared.

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