A popular misconception is that a once free of errors produced circuit board no longer needs to be tested by the E-test. However, because each production batch of a circuit board is a…
Bending radius examples
Examples of the minimum bending radius of flexible printed circuit boards with assumed thickness (see flexible circuit board layer buildup).
Calculation of the bending radius
The minimum bending radius r results from the desired application (stable/dynamic) and h, the overall height of the flexible part.
Pads and Vias on flexible PCBs
In general, the copper adhesion in flexible circuit boards is worse than in circuit boards with standard FR4 material. It is therefore recommended to make the pads /…
General Design Rules for flexible PCBs
If possible, limit the number of flex layers to 1 or 2, for maximum mechanical flexibility and cost savings.
Pay attention to a symmetrical stack-up of the…
