[LCT2-3] Comparative Quantitative Analysis of Surface Anisotropy Induced by Rubbing and Photo-Alignment on Polyimide Films | Proceedings of the International Display Workshops Volume 32 (IDW '25)

Proceedings of the International Display Workshops Volume 32 (IDW '25)

Dec 2 - Dec 5, 2025International Convention Center Hiroshima

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Proceedings of the International Display Workshops Volume 32 (IDW '25)

Dec 2 - Dec 5, 2025International Convention Center Hiroshima

[LCT2-3]Comparative Quantitative Analysis of Surface Anisotropy Induced by Rubbing and Photo-Alignment on Polyimide Films

*Ryo Nakano¹, Takayuki Miyamae¹(1. Chiba University (Japan))

https://doi.org/10.36463/idw.2025.0036

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Keywords:

Alignment Films,Polyimide,Photo-Alignment,Rubbing,Sum-Frequency Generation

Sum-frequency generation spectroscopy was employed to quantitatively analyze the anisotropy and structure of alignment films. Our findings indicate that rubbing induced anisotropy in entire alignment films, while linear polarized UV light irradiation affected photosensitive cinnamoyl group. This demonstrates that the anisotropy of photosensitive segment is the dominant factor governing liquid crystal molecular alignment.

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