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이 논문의 연구 히스토리 (7)
2009
2006
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The mechanical rubbing of a polyimide (PI) layer with a velvet cloth has been dominantly used to induce a uniform alignment of liquid crystal molecules in the manufacturing process of liquid crystal displays (LCDs). The rubbing process is affected by its process parameters and also by the nature and properties of the rubbing cloth used. We fabricated the rubbing cloths with various pile densities and different weaving structures and then investigated how the parameters were related to the effect of the cloth on the rubbing process and the properties of rubbed PI alignment layers (ALs). As the pile density increases at same rubbing process parameters, the degree of molecular orientation of the rubbed AL and its surface roughness increase with an increase of the contact area between the rubbing cloth and the AL surface. Furthermore, a more uniform rubbing is also achieved. The results in this work showed that higher pile density of the rubbing cloth induces a better rubbing effect, which is indeed more favorable to the LCD process. It was also observed that the weaving can exert some influence on the rubbing process.
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참고문헌 (14)
참고문헌 신청
S.-H. Paek / 2001 / Comparative Study of Effects of Rubbing Parameters on Polyimide Alignment Layers and Liquid Crystal Alignment / J Ind Eng 7:316~325
K. Takatoh / 2005 / Alignment Technologies and Applications of Liquid Crystal Devices / Taylor & Francis :7~54
G. P. Sinha / 2001 / Large, Continuously Controllable Nematic Pretilt from Vertical Orientation / Appl Phys Lett 79:2543~2544
D. S. Seo / 1992 / 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 61:2392~2394
B. S. Ban / 1999 / Materials and Rubbing Dependence on Azimuthal Energy of Rubbed Polyimide Surfaces / Appl Phys Chem B 103:3869~3871
K. Takatoh / 2005 / Alignment Technologies and Applications of Liquid Crystal Devices / Taylor & Francis :7~54
G. P. Sinha / 2001 / Large, Continuously Controllable Nematic Pretilt from Vertical Orientation / Appl Phys Lett 79:2543~2544
D. S. Seo / 1992 / 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 61:2392~2394
B. S. Ban / 1999 / Materials and Rubbing Dependence on Azimuthal Energy of Rubbed Polyimide Surfaces / Appl Phys Chem B 103:3869~3871
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