Making 0.1mm traces PCB in my Homemade Lab

Can a standard Fiber Laser achieve 100-micron PCB traces at home? In this video, I push my DIY PCB fabrication process to the limit. My goal is to achieve reliable 100um (0.1mm) tracks using a fiber laser and chemical etching, bridging the gap between hobbyist methods and professional manufacturing. I take you through the entire technical workflow: from setting up KiCad and FlatCAM with custom tool offsets to compensating for the laser dot diameter. You’ll see the real-world challenges of precision etching, including how chemical concentration and timing affect under-etching and trace resistance. I don't just show the successes; I analyze the failures, like the electrical resistance mismatch (2.4 Ohms theoretical vs 3.9 Ohms measured) and how I tuned the process to find the "sweet spot" for repeatable results. In this video: Software Setup: Configuring KiCad and FlatCAM for high-resolution isolation routing. Laser Processing: Using a fiber laser with a vacuum bed for perfect focus. Chemical Etching: Finding the ideal HCl and Hydrogen Peroxide balance for 0.1mm traces. Microscope Analysis: Comparing theoretical vs. real-world trace width and resistance. This project is part of my ongoing journey to combine precision electronics with custom mechanics. If you are interested in CNC conversions, DIY lab equipment, and high-density electronics, consider subscribing! Timestamps: 00:00 The 100-micron Challenge 00:31 Software Workflow: KiCad to FlatCAM 01:50 Fiber Laser setup and Vacuum Plate 02:33 The Etching Chemistry (HCl + H2O2) 03:53 Dealing with Failures: Resistance & Clearance 04:41 Final Results & Microscope Check 05:31 Conclusion and What's Next Check out my other builds: double sided PCB tutorial:    • How to make Double Sided PCBs at home with...   (to be updated) DIY Vacuum Plate for Laser:    • Making a Vacuum Plate for my Fiber Laser   CNC Lathe Conversion:    • It's finally moving! The CNC lathe comes t...   #PCB #ElectronicEngineering #FiberLaser #DIYElectronics #KiCad #MicroElectronics #Engineering #Maker