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.

To start the process a blank PCB board is cut to the final board size. Photoresist Dry-Film is applied to one side of the board before it is put face down on the machine.

Its cutting-edge laser systems are expertly engineered for high-precision applications in a wide range of industries and tailored to each client’s unique manufacturing needs.

The team from MIT has come up with a technology called SensiCut, a material sensing platform for laser cutters that warn you of harmful materials.

We cut our Fair Value Estimate on Han’s Laser to CNY 44, corresponding to 19 times 2023 P/E, after reducing our 2022-26 revenue and EPS estimates by 16% and 17%, respectively, on average.