Here's a step-by-step video about how JLCPCB makes PCB's. The link goes directly to that step at 21:09: https://youtu.be/ljOoGyCso8s?t=1269 https://youtu.be/ljO

Here's a step-by-step video about how JLCPCB makes PCB's. The link goes directly to that step at 21:09: https://youtu.be/ljOoGyCso8s?t=1269 https://youtu.be/ljOoGyCso8s?t=1269 It looks like in this case they are using a CNC router to make the cuts, and a vacuum table to keep the PCB's in place (it's a table with a grid of tiny holes that has vacuum inside to suck the PCB's onto the table).