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http://dx.doi.org/10.4313/JKEM.2007.20.3.245

Liquid Crystal Aligning Capabilities Treated on Organic Overcoat Thin Films by Ion Beam Irradiation Method  

Han, Jeong-Min (Department of Electrical & Electronic Engeering(C-724), College of Engineering, Yonsei University)
Kim, Byoung-Yong (Department of Electrical & Electronic Engeering(C-724), College of Engineering, Yonsei University)
Kim, Jong-Yeon (Department of Electrical & Electronic Engeering(C-724), College of Engineering, Yonsei University)
Kim, Young-Hwan (Department of Electrical & Electronic Engeering(C-724), College of Engineering, Yonsei University)
Han, Jin-Woo (Department of Electrical & Electronic Engeering(C-724), College of Engineering, Yonsei University)
Hwang, Jeoung-Yeon (Department of Electrical & Electronic Engeering(C-724), College of Engineering, Yonsei University)
Lee, Sang-Keuk (Department of Electrical & Electronic Engeering(C-724), College of Engineering, Yonsei University)
Kang, Dong-Hun (Department of Electrical & Electronic Engeering(C-724), College of Engineering, Yonsei University)
Ok, Chul-Ho (Department of Electrical & Electronic Engeering(C-724), College of Engineering, Yonsei University)
Seo, Dae-Shik (Department of Electrical & Electronic Engeering(C-724), College of Engineering, Yonsei University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.20, no.3, 2007 , pp. 245-249 More about this Journal
Abstract
The liquid crystal display (LCD) applications treated on the organic overcoat thin film surfaces by ion beam irradiation was successfully studied. The good LC aligning capabilities treated on the organic overcoat thin film surfaces with ion beam exposure of $60^{\circ}$ for 2 min above ion beam energy of 1200 eV can be achieved. But, the alignment of defect of NLC on the organic overcoat surface at low energy of 600 eV was measured. The pretilt angle of NLC on the organic overcoat thin film surface with ion beam exposure of $60^{\circ}$ for 2 min at energy of 1800 eV was measured about 1 degree. Finally, the good thermal stability of LC alignment on the organic overcoat thin film surface with ion beam exposure of $60^{\circ}$ for 2 min until annealing temperature of $200^{\circ}C$ can be measured.
Keywords
Organic overcoat; Ion beam exposure; Alignment; Nematic liquid crystal;
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1 B. O. Myrvold and K. Kondo, 'A population distribution model for the alignment of nematic liquid crystals', Liq. Crystals., Vol. 17, p. 437, 1994   DOI   ScienceOn
2 D.-S. Seo, K. Araya, N. Yoshida, M. Nishikawa, Y. Yabe, and S. Kobayashi, 'Effect of the polymer tilt angle for generation of pretilt angle in nematic liquid crystal on rubbed polyimide surfaces', Jpn. J. Appl. Phys., Vol. 34, p. L503, 1995   DOI   ScienceOn
3 D.-S. Seo and S. Kobayashi, 'Effect of high pretilt angle for anchoring strength in nematic liquid crystal on rubbed polyimide surface containing trifluoromethyl moieties', Appl. Phys. Lett., Vol. 66, p. 1202, 1995   DOI   ScienceOn
4 R. Arafune, K. Sakamoto, S. Ushida, S. Tanioka, and S. Murata, 'Importance of rubbing-induced inclination of polyimide backbone structures for determination of the pretilt angle of liquid crystals', Physical Review., Vol. 58, p. 5914, 1998
5 H. Matsuda, D.-S. Seo, N. Yoshida, K. Fujibayashi, and S. Kobayashi, 'Estimation of the static electricity and optical retardation produced by the rubbing polyimide and polyamide films with different fabrics', Mol. Cryst. Liq. Cryst., Vol. 264, p. 23, 1995   DOI
6 D.-S. Seo and J.-Y. Hwang, 'Liquid crystal aligning capabilities using a new photodimerization method on a poly(4'-methacryloyloxy chalcone) surface', Jpn. J. Appl. Phys., Vol. 39, p. 816, 2000   DOI   ScienceOn
7 D.-S. Seo, S. Kobayashi, and M. Nishikawa, 'Study of the pretilt angle for 5CB on rubbed polyimide films containing trifluoromethyl moiety and analysis of the surface atomic concentration of F/C(%) with an electron spectroscope for chemical analysis', Appl. Phys. Lett., Vol. 61, p. 2392, 1992   DOI
8 D.-S. Seo and J.-M. Han, 'Generation of pretilt angle in NLC and EO characteristics of photo-aligned TN-LCD with oblique non-polarized UV light irradiation on polyimide surface', Liq. Crystals., Vol. 26, p. 959, 1999   DOI   ScienceOn
9 J.-Y. Hwang, D.-S. Seo, J.-Y. Kim, and T.-H. Kim, 'Aligning capabilities of nematic liquid crystal on photopolymer-based-(phenyl)maleimide homopolymers ' , Jpn. J. Appl. Phys., Vol. 42, p. 194, 2003   DOI
10 J.-Y. Hwang, D.-S. Seo, O. Kwon, and D. H. Suh, 'Electro-optical characteristics of photo-aligned TN-LCD on PM4Ch surfaces', Liq. Crystals., Vol. 27, p. 1045, 2000   DOI   ScienceOn