Flexible printed circuit board is a type of printed circuit board, also known as FPC. FPC usually uses polyimide (PI) as the substrate, which can stop bending and flexing at will. PCB is a so-called rigid printed circuit board, commonly referred to as a hard board or PCB. Generally, FR4 is used as the substrate and cannot be bent or bent. FPC flexible printed circuit board is used for connections that require repeated bending and some small parts. In PCB, circuit boards are often used in centers that are not bent and are relatively hard.

FPC soft board is not only a flexible circuit board, but also an important design method for connecting into a planar circuit structure. This structure can be used in conjunction with other electronic product designs to build various applications. For PCBs, unless the circuit is flattened with grout, the circuit board is generally flat. Therefore, the design of electronic products must be fully applied to flat space, and FPC is a good solution. The common space expansion solution for PCBs is to use slots and interface cards. FPC flexible boards can be designed with adapters to create similar structures, making directional design more flexible.

FPC flexible board can use terminal connections to stop circuit connections, but it can also use soft and hard separation boards to avoid these connection mechanisms. Two hard boards can be connected into a parallel circuit system using a connecting FPC, and can also be adjusted at any angle to meet the shape design of different products. A single FPC can use a planning method to configure multiple hard drives and connect them. This method can reduce interference between connectors and terminals, improve signal quality and product reliability.