Rigid-flex a flexi DPSFlexible PCB have settled as a standard product on electronic market in last years. They make their way situations where minimizing of weight and dimensions of the final product are crucial. Polyimide film is used as a support material, which can be used and manufactured in higher temperature conditions compared to PET and PEN materials. Flexible PCBs needs to be seen as a different kind of material compared to FR4 and thus there´s a need to recognize that the moisture absorption, all axes expansion as well as copper adhesion significantly alters their technological possibilities.
Flexible PCBs allow realization of complex assemblies at product´s minimum size and weight. They dispose with dynamic and mechanical bending strength.
There are 4 flexible PCB types:
1. 1 layer
2. 2 layers
3. Rigid-flex with flexible outer layer
4. Rigid-flex with flexible inner layer