They make PCB etching lasers, just FYI. So the real problems are in more than 2 layers (since cameras and marks/holes can align both sides of a 2-layer board).

They make PCB etching lasers, just FYI. So the real problems are in more than 2 layers (since cameras and marks/holes can align both sides of a 2-layer board). The lasers, as you'd guess, are for prototyping and a few specialty purposes. Check out LPKF[1] for all kinds of neat toys. [1] http://www.lpkfusa.com http://www.lpkfusa.com