Study of dual alignment technology

• Main Authors: Chia-Wei Yu, 游家維
• Other Authors: Gwo-Mei Wu
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/64954340120409667154

碩士 === 長庚大學 === 電子工程研究所 === 95 === In this study, we investigated a new alignment technique combined two mature alignment technologies of Rubbing alignment and UV alignment that in order to controlled the pretilt angle of OCB liquid crystal. In our experiment, we set parameter of rubbing alignment process was invariable. Due to the exposure energy that was controlled by exposure time. So we variable the exposure time in our experiment and combined with rubbing process to achieve high pretilt angle. We coated polyimide alignment layer on 1×1 glass substrate then started rubbing process. Through rubbing process to damaged the polyimide surface to achieved orientation alignment to LC. After rubbing process we combined with Ultra Violet alignment technique to causes damaged of partly alkyl chain on polyimide surface in the cause of forming vertical alignment and horizontal alignment in small area simultaneously. With different exposure time and immovable light incident angle of 30o that we could obtained the tendency curve of UV pretilt angle and exposure time. In conclusion, we find out the largest pretilt angle is 5.11o with the exposure time for 40 minutes.