| 研究生: |
游文舜 Yu, Wen-Shun |
|---|---|
| 論文名稱: |
一種新穎MLCC低溫端電極 A Novel Ultra Low-Temperature Termination For MLCC Application |
| 指導教授: |
李文熙
Lee, Wen-Hsi |
| 學位類別: |
碩士 Master |
| 系所名稱: |
電機資訊學院 - 電機工程學系 Department of Electrical Engineering |
| 論文出版年: | 2021 |
| 畢業學年度: | 109 |
| 語文別: | 英文 |
| 論文頁數: | 81 |
| 中文關鍵詞: | 積層陶瓷電容器 、鋁膏 、端電極 、置換反應 |
| 外文關鍵詞: | MLCC, Aluminum paste, Termination, Galvanic displacement reaction |
| 相關次數: | 點閱:101 下載:0 |
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隨著科技進步,積層陶瓷電容已成為最被廣泛使用的被動元件,由於目前5G通訊技術、智慧型手機、自動駕駛車等先進技術正不斷地蓬勃發展,使積層陶瓷電容的市場需求量不斷提高,因此積層陶瓷電容在工業發展上佔有重要的一席之地。但目前積層陶瓷電容仍存在一些問題待解決,卑金屬積層陶瓷電容雖然材料成本低,但製程需要在高溫且還原氣氛下進行,製程成本高且高溫易造成積層陶瓷電容破裂,而貴金屬積層陶瓷電容則是材料太貴。
本研究利用印刷方式將鋁膏印刷在積層陶瓷電容端電極上,再透過賈凡尼置換反應的方式將鋁膏置換為銅金屬,以此方式製作積層陶瓷電容低溫端電極。從實驗結果得知,在添加5g/L檸檬酸鈉及0.5 ppm硫脲的條件下,當置換溫度為60℃並持續60分鐘時可以得到最低電阻率2×10-7 Ωm,透過阻抗分析儀可量測到電容值為22 uF、耗散係數為0.037及等效串聯電阻為2.58 Ω的最佳積層陶瓷電容特性。以此新穎的方式製備低溫端電極,不只能降低製成溫度以避免高溫帶來的影響,也能降低製程成本以達到市場競爭力。
With the advancement of technology, laminated ceramic capacitors have become the most widely used passive component. As advanced technologies such as 5G communications, smartphones and self-driving cars continue to flourish, the demand for laminated ceramic capacitors continues to grow. As a result, laminated ceramic capacitors are playing an important role in industrial development. However, there are still some problems with laminated ceramic capacitors that need to be solved. Although the material cost of base-metal electrode-multilayer ceramic capacitors is low, the disadvantage is that the process needs to be carried out at high temperature and in a reducing atmosphere, which is costly and prone to breakage of the laminated ceramic capacitors at high temperature. The disadvantage of noble-metal electrode-multilayer ceramic capacitors is that the material is too expensive.
In this study, aluminum paste was printed on the end electrodes of laminated ceramic capacitors by means of a galvanic replacement reaction to replace the aluminum paste with copper metal. In this study, laminated ceramic capacitors were produced with low temperature electrodes in this way. From the experimental results, the lowest resistivity of 2×10-7 Ωm was obtained at a replacement temperature of 60°C for 60 minutes with 5g/L sodium citrate and 0.5ppm thiourea. With the help of an impedance analyzer, the best characteristics of laminated ceramic capacitors can be measured: 22 uF capacitance, 0.037 dissipation coefficient and 2.58 Ω equivalent series resistance. This innovative approach to low temperature electrode production will not only reduce production temperatures to avoid the effects of high temperatures, but will also reduce process costs to achieve market competitiveness.
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校內:2026-10-26公開