Sensitivity of the photo-crosslinkable polyimide for liquid crystal alignment

Wen Chin Lee*, Chain-Shu Hsu, Shin Tson Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Two methods were developed for enhancing the photosensitivity of the cinnamates-contained polyimide (PICA). One is to increase the content of cinnamate side chain in PICA main chain and another is to blend some photosensitizer into PICA films. Our experimental results show that increasing the rate of photo-dimerization decreases the alignment ability of the PICA films. Using the molecular simulation method, we successfully describe the photoalignment mechanism of the PICA films. It is also found that photo-induced LC alignment ability of the PICA film could be enhanced through choosing a proper coating solvent.

Original languageEnglish
Pages (from-to)5942-5946
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number10
StatePublished - 1 Oct 2001


  • Cinnamate
  • Liquid-crystal display
  • Photoalignment mechanism
  • Polyimide
  • Sensitivity
  • UV

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