| 摘要 |
A liquid crystal device is constituted by a pair of substrates each provided with a transparent electrode, and a liquid crystal disposed between the substrates; at least one of said pair of substrates having thereon an alignment film comprising (i) a polyimide including principally a recurring unit of the following structural formula (I): <IMAGE> (I) wherein R11 denotes a tetravalent organic group, and R12 and R13 denote the same or different alkyl or perfluoroalkyl groups having 1-10 carbon atoms, and also at most 20 mol. % of a recurring monoamine unit of the following structural formula (II): <IMAGE> (II) wherein R21 and R22 denote the same or different alkyl or perfluoroalkyl groups having 1-10 carbon atoms, and X denotes an aromatic group, a heterocyclic group or a derivative group thereof; or (ii) a polyimide obtained through a reaction of at least two species of tetracarboxylic anhydrides of the following formula (III):ent organic group, and a diamine of the following formula (IV): <IMAGE> (IV) wherein R41 and R42 denote the same or different alkyl or perfluoroalkyl groups having 1-10 carbon atoms.
|
