Etching Effects of Blended Polyimide Layers for Liquid Crystals

This paper introduces a novel alignment method for control of pretilt angles in liquid crystals (LCs) using an etchant dipping effect on a mixed polyimide layer as an alternative alignment layer for liquid crystal display applications. A rubbing process was used to induce LC alignment and induce the...

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Bibliographic Details
Published in:Molecular Crystals and Liquid Crystals 2011-01, Vol.550 (1), p.51-56
Main Authors: Kim, Jeong-Hwan, Park, Hong-Gyu, Kang, Young-Gu, Lee, Hee-Jun, Kim, Young-Hwan, Yang, Seok, Jeong, Hae-Yun, Kim, Byoung-Yong, Park, Tae-Kyu, Han, Jeong-Min, Seo, Dae Shik
Format: Article
Language:English
Subjects:
Alignment
alignment method
Chemical compounds
Crystals
Dipping
etchant dipping effect
Etching
LCDs
Liquid crystal displays
Liquid crystals
mixed polyimide
Polyimide resins
Rubbing
rubbing process
Temperature
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Summary:This paper introduces a novel alignment method for control of pretilt angles in liquid crystals (LCs) using an etchant dipping effect on a mixed polyimide layer as an alternative alignment layer for liquid crystal display applications. A rubbing process was used to induce LC alignment and induce the measured LC pretilt angle on the etchant dipped mixture layer. The resulting thermal stabilities were good, however thermal stresses decreased as the etchant dipping time increased, indicating that the LC anchoring energy became weaker as a function of etchant dipping time after treatment. Excellent voltage-transmittance characteristics for vertically aligned cells were observed for all conditions.
ISSN:1542-1406
1563-5287
1527-1943
DOI:10.1080/15421406.2011.600209