| 摘要 |
PURPOSE: To enable the production of a liquid crystal display element with which the nonuniformity of the thickness of oriented films is eliminated by laminating the oriented films on the inside surfaces of substrates formed with electrodes of prescribed shapes, then subjecting the oriented films to a low-temp. preliminary heat treatment and a high-temp. normal heat treatment to cure the oriented films. CONSTITUTION: The substrates 1a, 1b laminated and formed with the oriented films 3a, 3b are first subjected to preheating for about 30 to 60 seconds at 80 to 120 deg.C at the time of subjecting the substrates to the heat treatment. Further, the substrates are subjected to the normal heat treatment within a temp. range of 180 to 250 deg.C and the liquid crystal display element is completed through ordinary succeeding stages after the heat treatment is completed. The org. solvents included in the oriented films are gradually evaporated through the preheat treatment of the low temp. if the heat treatments are executed in such a manner and, therefore, the formation of the nonuniformly oriented films by the nonuniform evaporation of the org. solvents is prevented and the oriented films 3a, 3b having the flat surfaces are obtd. As a result, the degradation in the image quality by the defective oriented films is prevented. |
