壓電噴墨技術為一種非接觸式的直接製造方法，除了可以精確的控制液滴的尺寸與位置外，不需要光罩或是任何相關的微影技術，透過微液滴沉積於基板上，可以堆疊出特定的圖形與結構。微液滴的形成過程、大小與飛行速度除了受到流體本身特性的影響，同時受到操作的脈衝波形、電壓和頻率等影響。為了提高製程速度及噴印品質，各種影響噴墨過程的參數皆需要得到適當的控制。
本研究使用FLOW-3D®進行數值模擬與微液滴噴印行為觀察，探討壓力波形與液滴形成之間的關係，模擬系統以壓電式-收縮管型噴墨頭為載具，模擬液滴生成與飛行之完整過程，並以實驗觀測與量測結果來驗證模擬系統的準確性。在模擬系統被驗證可靠之後，藉由模擬系統探討在不同操作脈衝條件下液滴的生成及噴射行為；實驗系統則藉由輸入不同的脈衝波形訊號參數，並使用電荷耦合攝影機觀測液滴形成的過程，分析輸入訊號參數對於液滴體積、速度等變化，分析討論噴墨管內部壓力傳遞情形，利用本研究的實驗結果，瞭解其內部壓力波傳遞條件，尋找出有效驅動波形以及作動參數條件，達到精確控制收縮管型壓電式噴墨頭的目標。

Inkjet printing technology is a non-contact direct fabrication process. It can not only precisely control the droplet size and the deposit position, but fabricate desired pattern or structure without any mask-process and/or and lithographic technology. The droplet formation process was not only affected by the fluid properties, but also the input driving waveform conditions, such as waveform shape, voltage, and frequency etc. In order to improve the processing throughput and printing quality of inkjet printing technology, the droplet stability and ejection speed need to be well controlled.
The fluid dynamic program FLOW-3D® and inkjet printing experimental observations were employed to investigate the relationship between the driving waveform and resonance pressure of squeeze-mode piezoelectric inkjet printers. Through the simulation results and experimental analysis, the detailed pressure history under various driving conditions is obtained. Furthermore, the individual contribution of each waveform parameter in droplet formation is evaluated. These findings will help designers not only to design the optimal control driving waveform, but also provide valuable information for printhead design.

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