| 摘要 |
PURPOSE:To provide the oriented film which is provided with orientability to unidirectionally orient liquid crystal molecules without executing a rubbing treatment and is efficiently formable by consisting of the oriented film of a polyimide deriv. having a polarization structure having electron-withdrawing groups and unifying the directions of the polarization of the polarization structure in one direction. CONSTITUTION:A polyimide precursor having the polarization structure provided with the electron-withdrawing groups is applied to the electrode forming surface of a substrate 1 formed with transparent electrodes, by which a precursor film 3' is formed. This substrate 1 is then passed between bar-shaped magnetic poles 4a and 4b arranged in parallel with each other by opposing, for example, an N pole and an S pole and the precursor film 3' is subjected to magnetic field sweeping by a magnetic field in the specified direction thereof. The directions of polarization of the respective magnetic field orientation block parts of the precursor film 3' are unified to one direction along the magnetic field sweeping direction and the directions of the molecules a' are unified accordingly. The precursor film 3' is baked in this state to imidize the polyamide imide precursor. The oriented film 3 consisting of the polyamide imide deriv. is this formed. |
