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Laser micro-milling is a promising technique for fabricating microfluidic channels and structures on various substrates. In this study, we investigated the effects of laser beam energy and focal spot size on the machining characteristics of polycarbonate substrates. Our results show that increasing laser energy leads to an increase in the depth and width of channels, while reducing the focal spot size results in higher precision and smoother sidewalls. Moreover, we observed that the quality of the machined features strongly depends on the depth-to-width ratio, where a ratio of 1:1 produces the best results. These findings have important implications for the optimization of laser micro-milling processes for microfluidic applications.
1. What is laser micro-milling?
2. What did the study investigate?
3. How does increasing laser energy affect the machining characteristics of polycarbonate substrates?
4. What is the effect of reducing the focal spot size?
5. What is the depth-to-width ratio and why is it important in laser micro-milling?