TL;DR
The article discusses an innovative approach to creating high-resolution printed circuit boards (PCBs) using a fiber laser. [Giangix] has been experimenting with etching 0.1 mm traces on thin copper-clad boards, a task that typical DIY methods struggle to achieve with the same precision as commercial production lines. By employing a 20 Watt fiber laser and a custom vacuum table to secure the boards, [Giangix] is able to engrave the chemical resist layer with impressive accuracy.