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Visualization of rubbing nonuniformity by double surface treatments of polyimide-coated substrate for liquid crystal alignment

Title
Visualization of rubbing nonuniformity by double surface treatments of polyimide-coated substrate for liquid crystal alignment
Authors
Chung D.-H.Takanishi Y.Ishikawa K.Takezoe H.Park B.
Ewha Authors
박병주
Issue Date
2001
Journal Title
Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
ISSN
0021-4922JCR Link
Citation
vol. 40, no. 3 A, pp. 1342 - 1344
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
A new method for characterizing rubbing nonuniformity in liquid crystal cells is proposed. Homogeneously aligned cells made by rubbing apparently give a uniform texture under a polarizing microscope. However, nonuniformity of rubbing becomes apparent as scratched patterns, if the rubbing is preceded by rubbing or photoalignment processes. On the other hand, it was found that photoalignment gives quite a uniform texture even on a priori photoaligned surfaces. Thus the double surface treatments along different directions visualize the nonuniformity of rubbing, supplying a tool to examine the condition of the rubbing machine used including buffing cloths.
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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