The overall drilling process of flexible PCB is not much different from the rigid PCB’s. But as the last video, Flex PCB Manufacturing Process – Board Cutting FPC Material Issue（https://www.youtube.com/watch?v=nqqCwmvLlq0） says that materials of FPCs are quite different from the rigid printed circuit boards (RPCs). FPCs no longer contain glass fiber cloths to reinforce resin, resulting in flexibility. Micro-hole quality is the most important issue in FPC drilling. The smallest hole diameter that can be achieved is 0.15mm in PCBWay.
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