Abstract
Abstract: Microchannel in microtechnology is a channel with a hydraulic diameter below 1 mm. Microchannels are primarily used in biomedical devices and microfluidic applications. Fabrication of microchannels has always been a complex task even at the world centres of excellence. This article addresses the fabrication techniques for creating microchannels using a 40W CO2 Galvo laser marking machine. It was able to control the channel dimensions by changing the power, scanning speed, and scanning time of the laser source. The results show that the created channel width increased as the laser power increased and the scanning speed decreased. Similarly, the channel depth increased as the laser power increased. Successfully tested in the laminar flow and droplet modes, the created microchannels were sealed using the thermo-mechanical method at 220oC. This is a new method for faster and cheaper production of microdevices that could be explored for sustainable development in the industry. The article concludes that with an appropriate solution, microchannels with minimal width and depth dimensions of 50 µm × 50 µm can be developed with channel roughness of 2-3µm.
 Keywords: Microfluidics, microchannels, CO2 marking machine, Galvo, mechanical sealing method.
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