General characteristics of FPC
General FPC product types will be designed into the following representative types:
1. Single side FPC
2. Single side line double side assembly FPC
3. Double sided FPC
4. Multi layer FPC
5. Hard and soft joint plate
6. Partially strengthened support soft plate
Designers must have a clear understanding of these types of soft plates, so as to avoid improper application selection. When the structural type of soft board is selected, how to make good use of the assembly characteristics of soft board to give full play to the best performance of soft board is the key to the success of the application of soft board products.
General soft board application considerations include: function, cost, reliability, structure efficiency, space application, etc. Good FPC design can cost, improve functions and save space. These factors should be taken into account when they are applied.
In terms of functionality, such as circuit layout design, the weight can be reduced by 50% if soft board is used instead. Using soft board to design electronic products can have many advantages as follows.
The element has relative motion demand, and the soft plate can provide kinetic energy connection with high cycle flexure life;
The parts can be assembled in the plane, and according to the product demand, they can be bent and assembled to match the appearance;
It can restore the flat state for maintenance;
It can effectively improve the efficiency of structure and installation;
FPC can reduce the burden of traditional wire arrangement and assembly, which may save 20% ~ 50% of the assembly cost;
It can fix the contact and connect the wrong direction, simplify the inspection, debugging and rework;
Compared with cable arrangement, it can save the complicated operations such as tangent, stripping and joint treatment;
Compared with PCB dimensional stability, soft board needs more tolerance control such as process, tool, measurement, etc. The unit price of polysulfimide resin material for soft board is much higher than that of hard board material with the same area, but adding soft board may reduce the usage of hard board and the connection of cable arrangement. The use of soft board can make product integration easier, reduce the quantity of parts, terminals and contacts, and improve product reliability.