Pretilt Angle of Nematic Liquid Crystals on Organic Solvent Soluble Polyimide

M. Nishikawa Tokyo Research Laboratory, Japan Synthetic Rubber Co. Ltd, 3-5-1 Higashi-yurigaoka, Asao-ku, Kawasaki, 215, Japan

K. Sano Tokyo Research Laboratory, Japan Synthetic Rubber Co. Ltd, 3-5-1 Higashi-yurigaoka, Asao-ku, Kawasaki, 215, Japan

T. Miyamoto Tokyo Research Laboratory, Japan Synthetic Rubber Co. Ltd, 3-5-1 Higashi-yurigaoka, Asao-ku, Kawasaki, 215, Japan

Y. Yokoyama Tokyo Research Laboratory, Japan Synthetic Rubber Co. Ltd, 3-5-1 Higashi-yurigaoka, Asao-ku, Kawasaki, 215, Japan

N. Bessho Tokyo Research Laboratory, Japan Synthetic Rubber Co. Ltd, 3-5-1 Higashi-yurigaoka, Asao-ku, Kawasaki, 215, Japan

D.-S. Seo Division of Electronic and Information Engineering, The Graduate School of Technology, Tokyo University of Agriculture and Technology 2-24-16, Nakamachi, Koganei, Tokyo, 184, Japan

Y. Iimura Division of Electronic and Information Engineering, The Graduate School of Technology, Tokyo University of Agriculture and Technology 2-24-16, Nakamachi, Koganei, Tokyo, 184, Japan

S. Kobayashi Division of Electronic and Information Engineering, The Graduate School of Technology, Tokyo University of Agriculture and Technology 2-24-16, Nakamachi, Koganei, Tokyo, 184, Japan

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Abstract

Pretilt angles of various nematic liquid crystals (NLCs) aligned on the cured organic solvent soluble polyimide alignment film containing fluorine atoms have been measured. The relationship between obtained pretilt angles and physical properties of NLCs shows that the pretilt angle of NLCs increases linearly with the perpendicular component of permittivity of NLCs. This phenomenon suggests that the lateral substituents in NLC affects the generation of pretilt angles by the anisotropic-excluded-volume effect.

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Pretilt Angle of Nematic Liquid Crystals on Organic Solvent Soluble Polyimide

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Pretilt Angle of Nematic Liquid Crystals on Organic Solvent Soluble Polyimide

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