Flexible pcb board ribbon cable
This is also called the stable flex and involves the flex layer to be bent into shape to fit into a design.
The bend is introduced in the beginning, and the layer is not subjected to further stress.
For one or two layers, the minimum bend radius can be 6X, while for multiple layers, it can be up to 12X.
2. Dynamic Flex
This design involves repetitive bending of the design; therefore, limiting it to two layers is recommended.
The copper should be allowed to sit on the neutral axis, which is the point that experiences minimal strain or stress.
The minimum bending radius is roughly around 100X.
3. One Time Crease
Minimum bend radius is irrelevant in this design since the flex layer is creased before being installed into the design.
Very thin layers and copper weights are recommended. The copper should be placed as near the neutral axis as possible.
types of bend radius flex pcb
There are two main types of bend radius for flex PCBs: dynamic and static.
1. Dynamic bend radius:
This is the minimum bend radius that a flex PCB can withstand while in motion.
Dynamic bend radius is important for applications where the PCB will be subject to repeated bending,
such as in wearable devices or robotics. The dynamic bend radius is typically smaller than the static bend radius.
2. Static bend radius:
This is the minimum bend radius that a flex PCB can withstand while in a fixed position.
Static bend radius is important for applications where the PCB will be bent to fit into a specific space or shape,
such as in medical devices or automotive applications.
The static bend radius is typically larger than the dynamic bend radius.
In addition to these two main types of bend radius, there are also specific bend radius requirements for different types of flex PCBs,
such as single-sided, double-sided, or multilayer flex PCBs.
It is important to consult with a PCB manufacturer to determine the appropriate bend radius for a specific application.