| 摘要 |
PURPOSE:To obtain the liquid crystal element with which good optical characteristics can be obtd. by forming horizontal oriented films of specific polyimide films, thereby increasing the orientation regulating force of the horizontal oriented films and uniformly orienting the liquid crystal molecules. CONSTITUTION:This liquid crystal element is constituted by joining a pair of transparent substrates 1, 2 consisting of glass, etc., via a frame-shaped sealing material 3 and sealing a liquid crystal into the region enclosed by a sealing material 3 between the substrates 1 and 2. Transparent substrates 4, 5 are respectively formed on the surfaces facing each other of the substrates 1, 2. The electrode forming surfaces of the substrates 1, 2 are coated with transparent insulating films 6, 7 consisting of silicon oxide, etc., and the horizontal oriented films 8, 9 for horizontally orienting the liquid crystal molecules A are formed on the insulating films 6, 7. Both of the horizontal oriented films 8, 9 consist of the polyimide films formed by superposing and depositing the monomolecular films of the compd. formed by bringing polyamic acid and long chain alkyl amine into reaction on each other to several layers to several tens layers, then imidizing such films by a heat treatment or chemical treatment and, therefore, the horizontal oriented films 8, 9 are uniform in the arranging direction of the high polymer main chains and have the stronger regulating force.
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