紫外線硬化型液晶性ポリマー膜を用いた液晶性配向膜によるプレチルト角制御

概要

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The pretilt angle is one of the important parameters for LC devices. In general, it is difficult to control the pretiltangle over the wide region by using the alignment film with polyimide (PI). In this report, the UV curable LC (UCL) polymer film is used as an alignment film. There are two types of UCLmaterials; the LC directors of UCL monomer become perpendicular or parallel to the substrate at the boundary betweenthe air and UCL material. To form the pretilt control film; first, the UCL monomer is spin-coated on the conventionalPI alignment film, after that, the UV photo-cure treatment is done to form the polymer film. When the other LCmaterial drops on this UCL film surface, the film works as an alignment film and the LC director is alignment due to theself -conformation effect of LC. The control of the pretilt angle is attempted over the wide region varying the photo-cure condition. The pretilt angleis controlled approximately from 20 to 60 deg by UCL-008.
2012-10-30