| 摘要 |
PURPOSE:To produce a liquid crystal element capable of suppressing the movement phenomenon of liquid crystal molecules during driving and not degrading display quality even when the element is used for a long time by subjecting a polyimide precursor thin film to uniaxial orientation treatment and calcining the film thereby providing a polyimide orientation controlling layer. CONSTITUTION:A liquid crystal, especially chiral smectic liquid crystal 15 and a spacer 14 are interposed between a pair of substrates 11a, 11b each having a transparent electrode 12a, 12b and an orientation controlling layer (oriented film) 13a, 13b, respectively. The orientation controlling layer 13a, 13b are produced by subjecting a substrate on which a polyimide precursor thin film 2 is formed to uniaxial orientation treatment, especially rubbing treatment, and then heating and calcining to obtain a polyimide oriented film. By this method, regulating force concerning to pretilt of the liquid crystal can be reduced while the uniaxial orientation state of the oriented film is almost maintained. Therefore, movement phenomenon of the liquid crystal 15 related to the directional property of pretilt can be reduced without impairing the uniformity of orientation in the liquid crystal 15. |
