15W high-power UV laser engraves QR code on FPC circuit board Nowadays, QR codes have become an indispensable part of our daily necessities. We can use QR codes to pay, search, register and even store personal information. Engraving a QR code on the FPC circuit board can facilitate users to query and search for information, and to a large extent, it is convenient for consumers to use and search. But how to engrave a QR code on a limited or even narrow position on the FPC circuit board?