- 學位論文
奈米碳管補強之軟性電子導線
Carbon Nanotubes Reinforced Conductor for Flexible Electronics
摘要
本論文之實驗目標在於利用奈米碳管高延展特性及較好的導電 性，配合高導電性的微米銀片，組合成高強度的混合材料，以製造高 可靠性的微電子導線。我們使用可撓曲塑膠薄片ULTEMTM 1000B Film 為基板，利用網版印刷技術製作微電子導線。針對設計之微電 子導線作電性及力學性質量測。首先針對微電子導線作電阻率之分 析，調配不同體積比的奈米碳管及銀膠或銀粉製作導線，進而量測其 電阻值。實驗的結果顯示，奈米碳管摻入導電的銀膠或銀粉時，電阻 率變化相當小，使本微電子導線具有高導電性的特質。進一步對微電 子導線作機械應力對電阻值的影響，從實驗過程發現，當基板受到應 力影響下，若摻雜少量的奈米碳管，可降低應力對導線產生應變的影 響，並可保持良好的導電性，以延長微電子導線之壽命。另外，將微 電子導線作溫度對電阻率觀測，摻雜少量的奈米碳管對溫度變化的穩 定度亦相當好。 最後的實驗結論顯示，摻入少許奈米碳管使用網版印刷方式所製 成可撓性電路版，具有較佳抗應變特性及使用壽命。
並列摘要
Using Carbon Nanotubes (CNTs) as the reinforcements in a composite are considered to form ultra strong and stiff material by CNTs’ mechanical property. This thesis focus on the fabrication and characterization of flexible conductor by the composite of mixing CNTs and silver. The mixture was then printed on plastic by screen printing method indifferent patterns. After we fabricated such conduction lines, we measured their electrical properties to stress variations. At first, we analyzed the resistivity of the composite by mixing different ratios of CNT and Ag paste (by volume %). The results indicate that good conductivity can be maintained when 50% of CNT incorporated in the matrix. It is known that the conductive line suffered very large stress when the flexible substrate was bent. The following experiments performed the additional CNTs embedded in the conductive line can provide better performance to enhance the structure stiffness, when the substrate suffered horizontal tension and bending stresss. On the other hand, we measured the resistivity of the metal line in the airtight space with different temperature, the results show that good stability to temperature by adding CNTs in the conductive line . We also test the durable conductor by integrated CNTs in the fabrication process which exhibited better reliability and conductivity to the conventional flexible screen printed conductor .