what is flexible printed circuit board

Flexible Printed Circuit board (FPC) is a Circuit board made of polyimide or polyester film, which is highly Flexible and easy to assemble when used inside the appliance.With the upgrading of digital products and appliances such as mobile phones, the function of FPC is becoming more and more obvious in order to achieve more functions.Now, jin baize discusses the advantages and disadvantages of FPC, and discusses the characteristics of FPC.

Advantages:

flexible

The biggest feature of the FPC is its flexibility, which makes it easier to traverse and assemble in three dimensional space, and can also be crimped or folded, and can not be damaged in tens of thousands of times.

Save space and weight.

Compared with the rigid PCB, FPC is light, thin and flat, which reduces the volume of the device, so that it can assemble other more devices to achieve more functions.Under the same load, the weight can be reduced by about 70% compared with the wire cable, and the weight loss is about 90% compared with that of the rigid PCB.

Design controllability.

Capacitance, inductance, characteristic impedance and so on, with wire width, thickness, spacing, insulation thickness, dielectric constant, loss Angle tangent, etc., affect transmission.These parameters are not easy to design when designing a wire cable, while FPC can be easily designed.

Material selectivity

FPC has a variety of base materials, using different materials according to different requirements, which can save cost.General use, can use polyester film, high-end applications, can use polyurethane film.

security

FPC wire of various parameters of high consistency, implement the overall termination, eliminates the cable wire happen even when loading errors and rework, therefore reduced the failure, well has the high security.

Lack of points:

High initial cost

The FPC is designed and manufactured for special applications, so the cost of circuit design, wiring and photocopying is high.

Repair difficult

Once the FPC is made, it is difficult to change the changes that must be made from the base map or from the drawing program.The surface is covered with a protective film, which is to be removed before patching, and then restored after repair, which is a difficult task.