Essential Flex and Rigid Flex PCB Design Tip

- Jul 26, 2019-


In exactly what will be the initial of lots of rigid flex PCB pointers, we will certainly be discussing optimal rigid flex PCB stackups and materials. Among our consumers just recently sent us a 6 layers stackup that required a little tweaking. It's outstanding exactly how a few adjustments to your rigid flex PCB stackup design could guarantee toughness and manufacturability on your rigid flex board.We chatted it over with our designers and came up with options and choices to all of the issues


6_layer_rigid_flex_pcb_stackup

                                                                        6 Layer Rigid Flex PCB Stacup

The Board:

- This was a six-layer rigid flex PCB with connectors needing impedance control.

- The high-speed adapters linked finger locations from the side to the top side of the PCB board.


The Issues:

- The board's flex PCB layers were located on the outside of the stackup, which boosted the opportunity of manufacturing issues

- Making certain the board met the impedance needs.


The Option:

When the flex layers get on the outdoors, panels are tougher to handle and more challenging to process. This made the board much more durable and much easier to produce. It also permitted better impedance and better control around the flex finger area.

We embedded the flex PCB layers in the center of the stackup. This shielded the layers throughout the PCB manufacturing process and guaranteed that the less-durable flex layers were not revealed to outer-layer plating. This is how most rigid flex PCB stackups are created.


Because the flex layer is a different process, putting the flex layers inside enables flexible PCB manufacturers the capability to engrave away from the design while securing the flex layers. The material utilized additionally played a huge part in making this rigid flex PCB instead of flex. Rigid PCB material was utilized, enabling far better impedance and integrity. It was a better option than the initial FR-4 material.


Putting the rigid PCB material on the outside likewise permits us to make what is essentially a rigid panel. The flex PCB layers are additionally secured by our surface plating because it needs to breakable the material.


XPCB rigid flex PCB manufacturing processes are as following: initially we process the flexible layer as a two layers flex PCB. Then we laminate the flex layers between the rigid PCB layers. The ending step is grating the cover layers so the flex section comes to be viewable.