面板中，基板材料或結構對液晶分子的定向能力決定了產品操作模式，進而影響光及電學行為，無論學、業界，已有諸多製成方式相繼提出。
在產品端，已普遍使用的配向方式係利用絨布刷磨，產生影響液晶整體排列的溝槽結構。PI配向材料發展至今已相當成熟且普及，然表面處理仍是影響分子行為的核心因素，故探究液晶分子在設定的表面條件下達到整體定向的過程成了本研究之動機。
過去實驗室已知聚二甲基矽氧烷材料具備低表面能(約22.07mJ/cm2)，水滴於其表面之接觸角約 ，拒水性明顯;然對桿狀液晶而言接觸角約為54°，同時得知該材料的介面狀態對桿狀液晶錨定後整體呈垂直表面的定向行為。
利用矽氧烷聚合物製備結構異向性之表面，除了觀察液晶在表面上的體系行為，另外將樣品製備為矩形微流道，並以毛細灌注方式填充液晶，著眼於流動過程液晶分子的動態行爲。我們發現微通道的幾何尺寸對液晶的注入有一定的影響，液晶分子的指向在流動過程中將發生變化。預期由液晶分子的動態行為捕捉到分子的錨定訊息，可進一步強化對該結構中分子指向的瞭解。

In the field of display, the material and the structure of the substrate, which controls arrangement of liquid crystal , play an important role in the operation mechanism of devices, and have profound effects on electro-optics properties of the devices. Accordingly, there have been a large number of processes published whether in academia or industry.
The conventional way to achieve alignment is the use of rubbed polyimide surfaces which contain grooved structure and drive LC molecular to form uniform arrangement. No matter what a method is used for manufacture, the surface treatment is the key factor to the alignment of the liquid crystal molecules. The main purpose of the present research is to study the aligning process of LC molecules in microchannels.
According to our past studies, Polydimethylsiloxane (PDMS), which has low surface energy, can produce a large contact angle of water droplet. However, it is not necessary for rod-like LC to appear hydrophobic property like water on the surface. Besides, nematic liquid crystal molecules can be driven to form homeotropic alignment on polydimethylsiloxane surface.
In this study, we used imprinting method to produce anisotropic PDMS surfaces with rectangular microchannels, and observed the behavior of LC molecules by means of optical microscopy. We find that the mobility and the director field of nematic LC will be affected by different aspect ratio of PDMS substract. By means of observing the dynamic behavior of materials, we show the information of anchored process and promote the knowledge of the director in LC molecules.

第一章 緒論 1
第二章 液晶基礎理論 2
2-1 何謂液晶 2
2-2 連續彈性體 4
2-3 物理異向性 5
2-3-1光學異向性 6
2-3-2介電異向性 8
第三章 樣品製備與材料 11
3-1 聚二甲基矽氧烷 11
3-2 母板材料 14
3-2-1 周期性表面結構之矽母板 14
3-2-2 SU-8光阻結構母板 16
3-3 翻模樣品製作 17
3-4 液晶材料 20
第四章 表面能理論與樣品測定 21
4-1 表面能理論 21
4-1-1 平整表面特性 23
4-1-2 一維週期性PDMS表面 25
第五章 浸潤異向性表面與微流道對液晶行為之影響 27
5-1聚光干涉法 27
5-1-1 平板PDMS-5CB樣品 30
5-2 相位補償法 31
5-2-1光程差與干涉色 31
5-2-2 全波片(1st red plate) 33
5-2-3 檢測機制 34
5-2-4 平行配向-5CB樣品 35
5-3 浸潤異向性PDMS 表面 38
5-4 矽氧烷聚合物微流道 40
5-4-1 水滴毛細表現 40
5-4-2 5CB-穩定狀態 41
5-4-3 5CB-動態行為 47
第六章 總結 51
參考文獻 53

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