利用摩擦配向探討液晶分子配列參數

Investigation of rubbing parameter in liquid crystal molecular alignment by rubbed polyimide

郭偉銘(Wei-Ming Kuo)

指導教授 ： 黃振球博士

元智大學/工程學院/化學工程與材料科學學系/碩士(2001年)

摘要

摩擦聚合物表面使得液晶分子達到配向的方法相當使用，尤其在使用homogeneously配向時更容易達到這種效果。目前更廣泛的使用在液晶顯示器的配向製程中。可是這種摩擦配向的技術所造成各項重要參數之間的相互關係其實相當重要例如：摩擦強度、方位表面錨鉤力、表面錨鉤能、預傾角及秩序參數都是不太容易使人明瞭的。藉由AFM的觀察並利用摩擦配向的方法來研究摩擦強度與預傾角的關係。所以我們將研究這些參數的變化對於配向效果的影響。

關鍵字

聚亞醯胺 ； 預傾角 ； 錨鉤能

並列摘要

In order to better understand liquid crystal alignment on a rubbed polymer surface。Rubbing is a simple but reliable method used to homogeneously align liquid crystal。It is widely used in the actual production of liquid crystal displays。However，this technology investigated the relationship among rubbing strength、azimuthal surface anchoring strength、anchoring energy、pretilt angle and order parameter has not been clarified。Using the rubbed method ，we also studied the pretilt angle of the liquid crystal to the tilt direction as a function of the rubbing strength by AFM。Therefore，we will investigate various parameter。

並列關鍵字

polyimide ； pre-tilt angle ； anchoring energy

參考文獻

5.Y.Sato, K.Sato, T.Uchida,“Relationship between Rubbing Strength and Surface Anchoring of Nematic Liquid Crystal ”, Jpn.J.Appl.Phys. 32, 579(1992)﹒

6.E.S.Lee, P.Vetter, T.Miyashita, T.Uchida,“Orientation of Polymer Molecules in Rubbed Alignment Layer and Surface Anchoring of Liquid Crystals”,Jpn.J.Appl.Phys. 32, 1339(1993)﹒

7.K.Y.Han, P.Vetter, T.Uchida,“Determination of Molecular Inclination in Rubbed Polymer for Liquid Crystal Alignment by Measuring Retardation”, Jpn.J.Appl.Phys.32, 1242(1993)﹒

8.T.Uchida, M.Hirano, H.Sakai, “Director orientation of a ferroelectric liquid crystal on substrates with rubbing treatment:the effect of surface anchoring strength”, Liquid Crystal. 5, 1127(1989)﹒

9.Y.Iimura, N.Kobayashi, S.Kobayashi,“A New Method for Measuring the Azimuring Anchoring Energy of a Nematic Liquid Crystal”, Jpn.J.Appl.Phys. 33, 434(1994)﹒