Causes of water ripples in copper foil

It is caused by the vibration of grinder, steel pipe and grinding wheel system. Water ripple, also known as "water ripple" and "wave ripple", is a traditional decorative pattern of ceramics, which looks like the shape of water flowing. The reason of copper foil ripple is caused by the vibration of grinder, steel pipe and grinding wheel system. Copper foil is a kind of negative electrode electrolytic material, which is a thin and continuous metal foil deposited on the circuit board substrate and used as a conductor of PCB.