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標題: | 網版印刷壓電能量擷取器製程改良及轉印之研究 The Research of Piezoelectric Energy Harvesters by Screen Printing Method and the Improvement of the Transferring Technique |
作者: | Bo-Song Yao 姚博松 |
指導教授: | 吳文中(Wen-Jong Wu) |
關鍵字: | 鋯鈦酸鉛,網版印刷,轉印技術,壓電能量擷取器, PZT,screen printing,transfer technique,piezoelectric energy harvester, |
出版年 : | 2019 |
學位: | 碩士 |
摘要: | 目前透過物聯網以及穿戴式裝置的結合,市場已經逐漸成熟且變得更多元化。穿戴式裝置已漸漸滲透至我們日常生活,當中包括了健康與運動監測、身分驗證與資安問題,這些使生活更加便利的裝置最吸引消費者的注意與期待。而目前隨著已開發國家已經進入了高齡化社會,在這眾多種類的穿戴型裝置當中以醫療技術市場居於龍頭,透過裝置可以達到個人自主健康管理或者追蹤病患生理資訊的目標,資訊網路化也使整體醫療成本的底降低。但目前的大問題在於測量準確度以及長期供電兩者,為了解決此問題,本論文透過網版印刷法沉積壓電PZT(鋯鈦酸鉛)層並製作出壓電能量擷取器裝置,期望透過自供電系統來達到不間斷地供電。此外研究轉印技術期待將結構轉移至可撓性基板上,希望能藉由提升基板的靈活、可彎曲的特性使量測精準度提高。
在能量擷取器的範疇,本論文透過製程改良使本實驗室之網版印刷技術提升,目標為增加元件功率輸出。當中包括了:漿料調配與黏滯度調整、燒結熱製程參數改良、元件結構中加入介電層的保護,使PZT層無論是在材料特性或者製成元件後的輸出與以往研究相比提升了許多。 在轉印技術的範疇,本論文在原基板以及壓電層之間加入二氧化矽以及金作為轉印犧牲層,並成功地調整燒結熱製程參數達到PZT層得以完美脫離的效果,可轉移到其他基板上。而論文當中以轉印至全新不鏽鋼上,目的是希望在使用相同基板上,可以比較轉印前及轉印後的輸出進而去做分析與討論。 本論文成功製作出未轉印以及轉印後之懸臂樑式壓電能量擷取器,在未轉印壓電能量擷取器中,壓電層厚度約為22 μm,在0.5 g之振動環境中,共振頻率以及最大輸出功率分別為73.8 Hz 及 4.51 μW,單位體積能量密度優於本團隊過去以網板印刷製程所製作出之元件;使用轉印技術製程之壓電能量擷取器,壓電層厚度為12 μm,在 0.5 g之振動環境中,共振頻率以及最大輸出功率分別為85.7 Hz及 0.57 μW。並將此兩者數據進行比較與討論。雖然本論文中轉印部分尚未成熟,但相信在不斷地研製之後,這將會是一個相當有發展性的研究。 With the emergence of smart wearable devices connected to the Internet as IoT applications, the commercial electronics market is booming in a great diversity. The most popular applied scenarios are including health monitoring, exercise training, personal identification, etc. Besides, with the coming of aging societies, the need for health monitoring has become an urgent issue in developing and developed countries. Therefore, wearable health monitoring devices or portable medical usage take the lead in the market. However, all the wearable devices are encountering the challenge of long-term monitoring and low accuracy of measurement. To solve these two problems, screen printing method is used to fabricate the piezoelectric energy harvester (PEH) in this thesis. By doing so, PZT can be deposited thicker in batch process then transferred to any flexible substrates which means the output power and sensitivity could be supposedly improved. In this research, the PZT (Lead Zirconium Titanate) is being used as piezoelectric material. The screen-printing fabrication process has improved with proper modification including paste producing, viscosity controlling and temperature control in the sintering process. Furthermore, the dielectric layer deposition is applied to improve the stability of the poling process. The devices have been improved comparing the results previously. In transferring process, the thin gold layer on silicon with thermal oxide on top is being the sacrificial layer of the process. PZT thick layer can be easily and successfully transferred after proper sintering process and then the piezoelectric layer can be bonded to any flexible substrates. In this thesis, an improved cantilever beam piezoelectric energy harvester(PEH) and transferred PEH are successfully fabricated. In improving PEH, the thickness of the PZT layer is about 22 μm. The resonance frequency and the maximum output power are 73.8 Hz and 4.51 μW in a vibration environment of 0.5 g. In transferred PEH. The thickness of the PZT layer is 12 μm. The resonant frequency and maximum output power are 85.7 Hz and 0.57 μW in the same environment. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/73669 |
DOI: | 10.6342/NTU201903719 |
全文授權: | 有償授權 |
顯示於系所單位: | 工程科學及海洋工程學系 |
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