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Liquid Crystals Volume 35, 2008 - Issue 12
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Original Articles

IPS mode investigation of liquid crystal alignment on organic hybrid overcoat layer via ion beam irradiation

Chul‐Ho Ok Information Display Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, Seodaemun‐Gu, Seoul 120‐749, Korea
,
Byoung‐Yong Kim Information Display Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, Seodaemun‐Gu, Seoul 120‐749, Korea
,
Byeong‐Yun Oh Information Display Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, Seodaemun‐Gu, Seoul 120‐749, Korea
,
Young‐Hwan Kim Information Display Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, Seodaemun‐Gu, Seoul 120‐749, Korea
,
Kang‐Min Lee Information Display Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, Seodaemun‐Gu, Seoul 120‐749, Korea
,
Hong‐Gyu Park Information Display Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, Seodaemun‐Gu, Seoul 120‐749, Korea
,
Jeong‐Min Han Information Display Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, Seodaemun‐Gu, Seoul 120‐749, Korea
,
Dae‐Shik Seo Information Display Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, Seodaemun‐Gu, Seoul 120‐749, KoreaCorrespondence[email protected]
,
Dong‐Ki Lee Samsung Electronics Co. Ltd., Yeongtong‐Gu, Suwon, Gyunggi‐Do, Korea
&
Jeong‐Yeon Hwang Liquid Crystal Institute, Kent State University, Kent, OH 44242, USA
 show all
Pages 1373-1377 | Received 28 Aug 2008, Accepted 12 Nov 2008, Published online: 06 Jul 2010
 
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Abstract

The nematic liquid crystal alignment capability and electro‐optical (EO) performance characteristics of in‐plane switching (IPS) cells were first demonstrated on organic hybrid overcoat layers via ion beam irradiation. Usually the organic hybrid overcoat is used as the material for making a plate alignment layer in a colour filter process. To characterise the organic hybrid overcoat layer, we analysed the surface composition of the organic hybrid overcoat by X‐ray photoelectron spectroscopy. The results show that the intensity of C = O and C–O bonding undergoes a change corresponding to the changes in energy of the ion beam exposure. Moreover, EO performance characteristics of IPS cells on the organic hybrid overcoat layer via ion beam irradiation were observed to have similar characteristics to the polyimide.

Acknowledgements

This work was supported by MIC, Korea, under the ITRC support program supervised by the IITA (IITA‐2006‐1090‐0603‐0018).

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