| 摘要 |
<p>PURPOSE:To prevent the flaws on the surface of liquid crystal oriented films, nonuniform film thicknesses thereof, delamination of the films and the damage of driving electrodes and the consequent defective orientation and quality deterioration of a display element which are generated in the conventional rubbing method by bringing a monomolecular film formed on a water surface and diamine compd. in an aq. soln. into reaction to form a polyimide film and applying such film to the liquid crystal oriented films. CONSTITUTION:The sticking an forming of the liquid crystal oriented films 4, 4' are executed in the following manner: The compd. expressed by the formu la is synthesized of a pyromellitic dianhydride and octadecylamine. the compd. is dissolved in chloroform and when the soln. is dropped ont ot e aq. soln, the soln. spreads neatly on the water surface. Hydrophilic groups and hydropho bic groups array regularly on the surface. the film spread on the water surface is exerted with pressure in the compressing direction thereof by exerting pres sure onto a float 7 by a weight 6 to form the monomolecular film 9. The diamino diphenyl ether in the aq. sol. and the monomolecular film induce a condensation reaction thereafter and the hydrophobic group part is taken. The formed polyimide film is transferred onto glass.</p> |
