Alignment properties of liquid crystal on DLC film using ion beam

作者：Lee Jae Sang^*; Lee Chan Young; Kim Bom Sok

来源：Surface and Coatings Technology, 2011, 206(5): 986-989.

DOI：10.1016/j.surfcoat.2011.04.044

• Liquid crystal
• Alignment
• Ion beam
• Pretilt angle
• Rubbing free method

Uniform alignment of the liquid crystals is necessary for high quality liquid crystal displays (LCDs). In this study, the rubbing-free method was carried out for the modification of the DLC (Diamond Like Carbon) surface by Ar(+) ion beam bombardment. By ion beam conditions, such as the energy and fluence of the incident ions at incident angle of 45 degrees, the unidirectional out-of-plane liquid crystal pre-tilt angle is changed. Also, we measured the surface microstructure changes by ion beam using XPS, Raman spectroscopy and AFM analysis. Crystal rotation method was used for measuring the pre-tilt angle of LC and we checked voltage-transmittance (V-T) to evaluate the electro-optical characteristics. Also, the changes of the structural property were analyzed with AFM analysis. LC alignment and electric-optical characteristics which were obtained through LCDs cell alignment by ion beam treatment technology were confirmed that it is identical and suitable to the rubbing method to apply industrial application.

• 出版日期2011-11-25