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Liquid Crystal Alignment with a Photo-Crosslinkable and Solvent-Soluble Polyimide Film
Ist Teil von
Japanese Journal of Applied Physics, 2000, Vol.39 (5B), p.L471
Erscheinungsjahr
2000
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
A new photo-crosslinkable and solvent-soluble polyimide containing cinnamate
side chains (PICA) was developed for aligning nematic liquid crystals (LCs). Good LC
alignment was achieved by exposing a long-wave linearly polarized ultraviolet (LPUV)
light to the PICA film. The LC alignment direction is found perpendicular to the
polarization axis of the incident LPUV light. The uniform alignment of LC molecules
induced by PICA films remains intact after being heated at 85°C for 450 hours. A
small pretilt angle on the PICA film was generated by the double exposure method.