PCB is translated as a printed circuit board in Chinese, commonly referred to as a rigid circuit board. PCB is the carrier of electronic components and one of the important electronic components in electronic devices. PCB generally uses FR4 (glass fiber copper clad plate) as the substrate, also known as hard board, which cannot be bent or bent. PCB is generally used in places that do not require bending and require a certain degree of hardness support. Common PCB products such as computer motherboards, mobile phone motherboards, etc.

FPC, also known as flexible circuit board, actually belongs to a type of PCB, but compared to traditional printed circuit boards, it has a relatively thin appearance and can be bent and used arbitrarily. So it is also referred to as a flexible circuit board, also known as a flexible circuit board. FPC generally uses PI as the substrate and is a flexible material that can be bent or flexed at will. FPC is generally used in applications that require repeated bending and connection of small components, such as laptop screens that need to be frequently closed and opened, which requires the use of FPC.

FPC is not only a flexible circuit board, but also an important design method for connecting three-dimensional circuit structures. This structure, combined with other electronic product designs, can be used to construct a variety of different applications. With the continuous progress of technology, the application of FPC is becoming more and more widespread. For PCBs, unless the circuit is made into a three-dimensional form by applying film adhesive, the circuit board is generally flat. FPC is a good solution for fully utilizing three-dimensional space. In terms of hard boards, the current common space extension solution is to use slots and interface cards, but FPCs can create similar structures as long as they are designed with adapters, and have more flexibility in directional design.

The characteristic of FPC is that it can connect two hard boards into a set of parallel circuit systems, or it can be turned into any angle to adapt to different product shape designs.

FPC can also use terminal connection for circuit connection. As the design space of some precision products becomes smaller, a new structure has emerged: a soft hard combination board, which uses a special process to combine a PCB with an FPC, thereby avoiding connection structure design, saving space, and making it more stable in use. This approach reduces connector and terminal interference and can improve signal quality and product stability.