Characterizations of Polyimide Langmuir Blodgett Films for Nematic Liquid Crystal Alignment

Hiroyuki Abe Division of Electronic and Information Engineering, Faculty of Technology, Tokyo University of Agriculture & Technology, 2-24-16 Nakamachi, Koganei, Tokyo, 184, Japan; SEIKO EPSON Corporation, 392 Suwa-shi, Owa, 3-3-5, Japan

Makoto Chizaki Division of Electronic and Information Engineering, Faculty of Technology, Tokyo University of Agriculture & Technology, 2-24-16 Nakamachi, Koganei, Tokyo, 184, Japan

Yasufumi Iimura Division of Electronic and Information Engineering, Faculty of Technology, Tokyo University of Agriculture & Technology, 2-24-16 Nakamachi, Koganei, Tokyo, 184, Japan

Shunsuke Kobayashi Division of Electronic and Information Engineering, Faculty of Technology, Tokyo University of Agriculture & Technology, 2-24-16 Nakamachi, Koganei, Tokyo, 184, Japan

Abstract

In order to apply polyimide Langmuir Blodgett films to nematic liquid crystal (NLC) alignment, the optimum deposition conditions have been studied by measuring the azimuthal anchoring energy of 5CB aligned on the film. Special attention is paid to obtain good NLC alignment on the 2-type PI-LB flims, and we firstly prove that, by choosing the proper deposition conditions, the Z-type films show better performances of NLC alignment than Y-type films. The obtained azimuthal anchoring energy of the Z-type film exceeds 10⁻⁵ J/m², which is the strongest azimuthal anchoring energy of PI-LB films reported so far.

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Characterizations of Polyimide Langmuir Blodgett Films for Nematic Liquid Crystal Alignment

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Characterizations of Polyimide Langmuir Blodgett Films for Nematic Liquid Crystal Alignment

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