This machine makes patterns smaller than a human hair
Breaking Taps essentially started their channel for this project. Really impressive video with a good rundown of the whole process.
This is a maskless technique (similar to projection lithography) to create patterns in a photosensitive resin (photoresist). This is a common step in many microfabrication operations like transistor/semiconductor fabrication, MEMS devices, microfluidics, etc.
The advantage of maskless litho over traditional masked lithography is that you don’t need to generate a mask first (which often itself requires photolithography). Maskless is faster for one-off and prototype work, but mask is superior once you need to create millions of devices.
Being made as it is from salvaged components, aluminum extrusion, and 3D-printed parts, [Zach]’s setup is far from optimal. But he was able to get some pretty impressive results, with features down to 7 microns. There’s plenty of room for optimization, of course, including better galvanometers and a less ad hoc optical setup, but we’re keen to see where this goes. [Zach] says one of his goals is homebrew microelectromechanical systems (MEMS), so we’re looking forward to that.
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