He uses a laser cutter to cut Mylar sheets into stencils. [Juan] appears to be using EagleCAD and Express PCB. Both tools are available for free to hobbyists. The first step in the process is to ...

PCB Laser Drilling Machines Market is Segmented by Type (CO2 PCB Laser Drilling Machines, UV PCB Laser Drilling Machines), by Application (Consumer Electronics, Communications, Industrial ...

By cutting the solder mask layer into a business card with the laser cutter, it can be held on top of a PCB and then used as a stencil to add the solder paste more easily than could otherwise be done.