It is always better to prevent any design and manufacturing fault at the earliest before they escalate to major defects. By considering some standard rules you can minimize the number of defects during the fabrication of 6 layer rigid-flex PCB.
When manufacturing 6 layer impedance control rigid flex pcb, be remember to keep your flex ‘flexible’ using the right type and amount of materials. For example, if an application demands for a 6 layer rigid-flex PCB that should bend during the assembly and then should remain in a fixed position, you must use the right kind of copper and adhesives that allow you to do so.
It is suggested to keep circuits small. It is better to use a set of smaller circuits instead of a singular large circuit.It is not good practice to bend a flex circuit at the corners. However, some design situations demand bending at corners. In such cases, you can make a gentle curving, or use conical radius bends.
Copper used in a 6 layer rigid-flex boards has a tendency to detach from the substrate. Hence, it is essential to provide support for the copper to prevent it from detaching. Even if you are using surface mount pads and non-plated-through pads, consider using it along with some extra measures like coverlay mask to anchor pads.
It is imperative to strictly follow the recommended tolerances whenever possible.It is better to avoid laying traces over each copper layer in the same direction. It is recommended to stagger the traces to achieve even distribution of tension between copper layers.
It is recommended to carry a power or ground plane on a flex circuit to enhance/retain the board’s flexibility. You can consider using either solid copper pours or hatched polygons for the purpose.
In order to produce reliable rigid-flex based products, you must be careful enough to provide attention to detail. Otherwise, the final assembly may fail to provide the expected functionality and durability. These troublesome situations can be prevented by following the above mentioned recommendations. If you need to make 6 layer impedance control rigid flex PCB,inquire us anytime, we will provides better survice for you.