ラビング処理による双安定アンカリング界面の形成

概要

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In this paper, a new method is proposed to adapt bi-stable anchoring properties on the substrate. A mixed solution of PVCi and PI in same weight was used as an alignment material. The alignment material was coated on substrate surface by a spin coater. After baking treatment, a conventional unidirectional rubbing was conducted. As an LC material, a single nematic compound, 5CB was used. We confirmed that the LC molecules were aligned homogeneously in the cell (U State). The direction of alignment was parallel or perpendicular to the rubbing direction. When the ac voltage of 100V 10Hz was applied to the cell for about 1 s, the configuration of molecular alignment changed to the twisted state (T State). When the same ac voltage was applied for a few second, the T state of molecular orientation was transferred to the U state. Both states of T and U were memorized for long time. The mechanism of the transition between the T and U states is under examination.