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Printed Circuit Boards are a very customized product with different copper layers and different copper tracks and different materials, etc. And they can be divided to 3 kinds of PCB boards with Rigid PCB, Flex PCB, Rigid-Flex PCB.
1. Rigid PCB could do 1-48Layer, the main substrate is FR4, Rogers, Copper base and Aluminum, etc. and the multilayer Rigid PCB manufacturing process can be found below:
2. Flex PCB could do 1-16Layer FPC. The main substrate is polymide FCCL and it has high heat resistance and stable size. Tthe multilayer flex PCB manufacturing process can be found below:
3. Rigid-flex PCB could do 2-18Layer, the main substrate is FR4 + PI, or Rogers + PI, etc. and the multilayer rigid-flex PCB manufacturing process can be found below: