| Summary: | 碩士 === 國立中興大學 === 機械工程學系所 === 103 === In this study, a laser direct write technology is applied with a novel reactive silver ink to fabricate microscale conductive metal structures on a polymer substrate(polyimide film and polyethylene terephthalate film). In the process, green laser is focused on the polymer substrate and directed by using a scanning system. The laser power which absorbed by the polymer substrate is used to heat the transparent and particle-free reactive silver ink on the substrate, and thus trigger the chemical reactions to synthesis silver patterns selectively on the polyimide surface. The technology can be used to manufacture flexible electronics at atmospheric pressure and room temperature. The effects of laser power, scanning speed, number of scans and ink concentration on the properties of the resulted silver patterns are investigated. In addition, a numerical simulation analysis was carried out to analyze the thermofluidic transport phenomena in the process. The numerical results were compared with experimental measurements of the metal line morphology, line width and resistivity. Discussions based on the numerical results are provided to further understand the transport phenomena and the corresponding effects on the properties of the fabricated metal structures.
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