- 學位論文
導電奈米銅油墨的製備與應用
Preparation and applications of conductive ink based on copper nanoparticles
摘要
電子產品是現代人日常生活中不可或缺的一部分，而不論電子產品功能為何，都需要導體來傳遞電流，。一般來說金、銀、銅是最常見的導電油墨印刷材料，前兩者具有良好的化學穩定性和低電阻率(金電阻率為2.4 μΩ·cm，而銀是1.59 μΩ·cm)，但金作為油墨成本過高，因此在市面上的導電油墨的主要材料都以銀為主，但銀的價格仍是過高，銅因其價格低廉(約為銀價格1/7)和其優異導電性(1.7 μΩ·cm)，所以近年來銅逐漸成為可以替代銀成為導電油墨的材料，但銅在經過奈米化後，容易於空氣中氧化且容易聚集，所以油墨的製備、分散性、保存是奈米銅油墨最需要去克服的地方。本研究，以環保的抗壞血酸合成奈米銅顆粒並選用適當的保護劑及介面活性劑，藉由調整實驗參數合成抗氧化的奈米銅顆粒，並配製成導電油墨。以不同塗佈技術製及不同燒結的方式製備導電銅膜，並藉由添加黏著劑使附著力達到4B，硬度達到H，片電阻可達到< 0.6 Ω/□，另外藉由塗佈機制備導電圖騰，線寬為0.1 cm，電阻可達到5 Ω，油墨存放可維持至少半年不被氧化，燒結後的銅膜可維持至少5個月的低片電阻。
並列摘要
In this study, we focus on how to deploy a anti-oxidized nano copper conductive ink. Copper nanoparticles were synthesized with environmentally-friendly ascorbic acid and appropriate protective agents and surfactant were selected. The anti-oxidized nano copper particles were synthesized by adjusting experimental parameters and formulated into conductive inks. The conductive copper film is prepared by different coating techniques and different sintering methods, and the adhesion is up to 4B by adding an adhesive, the hardness reaches H, the sheet resistance can reach <0.6 Ω/□, and the conductive is prepared by a coater. The totem has a line width of 0.1 cm and a resistance of 5 Ω. The ink can be stored for half a year without oxidation. The sintered copper film can maintain a low sheet resistance of nearly 5 months.