According to the base material, PCB can be divided into flexible circuit board, rigid circuit board and rigid flexible combination plate, which are used in different equipment according to different purposes.
Flexible printed circuit board (FPC) is a circuit board made of polyimide or polyester film. It is highly flexible and easy to assemble when used in electrical appliances. With the upgrading of digital products and electrical appliances such as mobile phones, the function of FPC is becoming more and more significant in order to achieve more functions. Now Jin Baize will talk about the characteristics of FPC on the advantages and disadvantages of FPC.
1、 Advantages:
1. Flexible
Fpczui is characterized by its flexibility, which makes it more convenient to route and install in three-dimensional space. It can also be curled or folded, and will not be damaged after tens of thousands of twists and turns.
2. Save space and weight
Compared with rigid pcb, FPC is light, thin and flat, which reduces the volume of device assembly and assembly, and allows device assembly to assemble more devices to achieve more functions. Under the same current carrying capacity, its weight can be reduced by about 70% compared with wire and cable, and about 90% compared with rigid pcb.
3. Design controllability
Capacitance, inductance, characteristic impedance, etc. are related to conductor width, thickness, spacing, insulation thickness, dielectric constant, loss tangent, etc., affecting transmission. These parameters are not easy to do when designing wires and cables, while FPC can be designed more easily.
4. Material selectivity
The cost of FPC can be saved according to different substrate requirements. Polyester film can be used for general use, and polyacylide film can be used for high-end applications.
5. Safety
Various parameters of FPC conductor are highly consistent, and the overall termination is implemented, which eliminates the frequent errors and rework during the installation and connection of cable conductor. Therefore, the occurrence of faults is well reduced and has high safety.
2、 Disadvantages:
1. High initial cost
FPC is designed and manufactured for special applications, so the cost of circuit design, wiring and photographic plate is high.
2. Repair difficulties
Once the FPC is made, it must be changed from the base map or the prepared photo drawing program, so it is not easy to change. Its surface is covered with a protective film, which should be removed before repair and restored after repair, which is a difficult work.
3. Limited size
FPC is usually manufactured by batch process, so it is limited by the size of production equipment and can not be made very long and wide
