Investigation into the effect of ultra-short pulse laser parameters on machined surface integrity during laser milling
DOI:
https://doi.org/10.58368/MTT.22.6.2023.41-46Keywords:
Laser, Micromilling, Polycarbonate, Surface Roughness, MicrofluidicsAbstract
Development in microfluidics community demands vast array of materials, methodologies and procedures. As research efforts increase and interest in this topic grows, various strategies and procedures are becoming increasingly accessible. Polycarbonate is the most commonly used material in microfluidics. They are amorphous, transparent and have good impact and heat resistance, making it ideal for medical and industrial uses. While numerous methods for polycarbonate micromachining have been documented, such as lithography, imprinting; there are certain limitations. Laser machining however has the potential to overcome the challenges. In the present work, micromilling on polycarbonate using ultrafast femtosecond lasers have been reported. Polycarbonate, micro-milled by femtosecond laser is first investigated for its surface roughness. Accordingly, influence of parameters like laser pulse-energy and pulse-overlap on surface roughness was also analysed. Based on the micro-milled polycarbonate sheet’s minimal surface roughness, it was observed that lower values of pulse-overlap and pulse-energy results in high-quality surface finish.
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