微全分析系統(μ-TAS)的蓬勃發展下，以微機電技術(MEMS)來製作微小尺寸的管道實驗裝置具有體積小、實驗成本低、不易受到汙染以及樣本需求少等優點，但是隨著應用方面不斷地擴展，而使得結構越來越複雜，需要越來越多的儀器來相互配合。
本研究利用基礎的十字型以及T型結構，經過組合後成為製作上容易的三維維管道，進行油滴生成的相關研究；藉由三維管道結構降低油滴生成時壁面造成的影響力，並改變工作流體的流量來觀察油滴生成的尺寸以及頻率。並進一步在管道的上段增加能夠生成水滴的結構，進行以油滴包覆水滴的雙重包覆實驗，同樣改變工作流體來觀察可以生成雙重包覆的範圍，以及其生成的尺寸跟良率，並試圖為雙重包覆生成的趨勢依照穩定的情況分成三個區域，劃分出界線並針對界線去做探討，嘗試將雙重包覆的生成趨勢以及穩定區域做初步的劃分以減少後續研究的實驗範圍。最後對親疏水性的管道做初步的比較，嘗試找出親水性管道的油滴生成趨勢以及與疏水性管道相比其優勢所在。

Because of the great development of micro total analysis system (μ-TAS), using micro-electromechanical system (MEMS) facilitates the micro channel experimental device and shows the advantages of small size, low cost, less pollutions, few samples for experiment and so on. However, due to the extended applications in MEMS, the structure become more complicated. As a result, we need more sophisticated devices in order to reach the goal. In this study, basic cross shape structure and T-junction structure were composed and turned into three dimensional microchannel which is easier to manufacture and fulfill the task of generation of oil droplet. By using this three dimensional structure, the effect of the wall surface can be reduced and various sizes and frequencies of droplets generated in the channel can be observed at different flow rates. Furthermore, we extended the structure to bring water droplet in the upstream of the channel and yield double emulsion. To identify three different regimes of droplet formation according to the stability of the generation trend, we recorded the generation range, size and the yield rate of double emulsions. Through this way, we are able to roughly define the boundaries between the regimes and find the stable regions.

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