選擇性雷射燒結之系統建置與應用於軟性基板上塗佈之奈米銀改質研究

Abstract

本論文以選擇性雷射燒結塗佈於軟性基板上之奈米銀改質研究為目的，建置一套波長為532 nm之綠光雷射系統，由於奈米銀粒子在特定波長有高吸收率的效應，因此選擇適當的雷射波長可有效的燒結奈米銀粒子，使燒結出的奈米銀粒子有較佳的導電性。在雷射光路系統中含可將雷射源從線偏振態轉換為圓偏振態的功能。由於文獻中較少對奈米銀粒子，以不同雷射偏振態燒結後並探討其結果，因此在本研究中分別以線偏振及圓偏振光，規劃不同的雷射功率及掃描速度進行奈米銀粒子燒結，最後透過光學顯微鏡以及電子顯微鏡觀察比較，加上基本電性量測，比較奈米銀粒子燒結後相對結果。

In this thesis, we develop a 532 nm laser machining system that can be applied to selective laser sintering of silver nanoparticle ink on a flexible substrate Because silver nanoparticles have high absorption in specific wavelength, we can choose proper laser wavelength to sinter silver nanoparticles for better conductivity. Our laser system contains the function of converting linear polarized light to circular polarized light. In the past, less literatures about using different polarized light to sinter silver nanoparticles and discuss the results. In this research, different laser power and scanning speed with linear polarized light or circular polarized light to sinter silver nanoparticles is presented. At last, using optical microscope (OM) and scanning electron microscope (SEM) to observe the morphology and basic electrical property measurement to compare the results.