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Brewster angle microscope imaging of surface inhomogeneity in liquid crystal alignment polyimide layers

Title
Brewster angle microscope imaging of surface inhomogeneity in liquid crystal alignment polyimide layers
Authors
Park B.Wu J.W.Jung C.-S.
Ewha Authors
우정원
SCOPUS Author ID
우정원scopus
Issue Date
2001
Journal Title
Japanese Journal of Applied Physics, Part 2: Letters
ISSN
0021-4922JCR Link
Citation
vol. 40, no. 7 A, pp. L691 - L694
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The surface structure of the polyimide alignment layer has been probed by various tools, but a direct visualization of the treated layer surface over a sizable area is lacking. We demonstrate Brewster angle microscope imaging of the micro-grooves formed on a rubbed polyimide alignment layer, compared with the flat surface image of a photo-aligned polyimide surface. Textures of cholesteric liquid crystal on these alignment layers showed that the rubbing causes a nonuniform orientational alignment of liquid crystals, in contrast to a uniform orientation in the photo-aligned cell. This tool enables early detection of surface defects in alignment layers, which would significantly reduce the failure in liquid crystal display fabrication.
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자연과학대학 > 물리학전공 > Journal papers
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