隨著摩爾定律之趨勢，半導體製程與微製造技術不斷進步，大量快速的批次生產技術，已成為製程之主流。然而組裝技術則仍然停留在序列式之技術，如抓放技術（pick and place）。因此，可以同步組裝大量元件之流體自我技術為近期研究發展之重點。
由於流體自我組裝元件利用疏水性與親水性之表面性質差異，驅使具疏水性表面之元件組裝於基板上方特定之位置。本研究利用OTS進行玻璃表面之改質，使親水性玻璃之表面具有疏水性之流道，藉由流道之流場觀察，對流道親疏水界面對水流動之影響進行分析。
實驗結果顯示，在疏水區域，疏水性之表面具有較大之表面張力，使承載水滴累積體積並提高重心，水滴與表面之接觸角必須大於最大接觸角，水滴才能流動。且疏水區域之水流流速較慢，而親水區域之水流流速較快，利用兩者之特性可製作成為微小流道，以控制水滴流向。

Following the trend predicted by Moor’s law, the manufacturing process on semiconductor progresses continuously. The rapid mass production technology is becoming a major process in contrast to the traditional pick and place assembly techniques. Thus, the development of fluidic self-assembly (FSA) which can assemble massive small components simultaneously in parallel batches becomes more and more attractive.
FSA is an assembly process using fluid to transport components to binding sites and the components can orient itself on the binding sites by hydrophobic interaction. This study investigates the flow features on hydrophobic surfaces glass substrates are patterned into hydrophobic regions by OTS side by side with hydrophilic regions.
Experimental results show that on hydrophobic region, the higher surface tension increases both the height and center of gravity of water drops. It causes water drops become unstable. The contact angle of water drop must bigger the critical angle to make water drops start to flow. On hydrophobic regions, the flow speed is smaller than that on the hydrophilic regions. Thus, by a proper combination of hydrophobic and hydrophilic regions can guide flows to specific directions.

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