Are There Any Standard Specifications for Rigid-Flex PCBs?

Standard Specifications for Rigid-Flex PCBs

A rigid flex PCB has a rigid core with flexible sections that allow it to fold and twist without mechanical failure. Rigid-flex circuit boards have advantages over other types of printed circuit boards (PCBs). For example, they can reduce the weight and size of your product while increasing its functionality. They can also be used in applications where space is limited and a high level of flexibility is needed, such as wearable electronics or vehicle infotainment systems. However, these benefits come with a cost, and it is essential to consider the manufacturing processes of your PCB fabricator when choosing a rigid-flex design.

flex rigid pcb are more complex than traditional rigid PCBs. They must be designed with both rigid and flex sections, which requires special design tools and fabrication techniques. Additionally, they must be able to withstand bending and folding without delaminating or breaking. These factors make rigid-flex PCBs more expensive to manufacture than traditional rigid PCBs.

To keep costs down, you should adhere to IPC-6013 guidelines when designing a rigid-flex PCB. IPC-6013 is the “Qualification and Performance Specification for Flexible/Rigid-Flexible Printed Boards,” and it contains standards that govern many aspects of the PCB manufacturing process, including test methods and quality assurance provisions.

Are There Any Standard Specifications for Rigid-Flex PCBs?

Some of the most important guidelines in IPC-6013 are those governing layout, plating requirements, and assembly and inspection procedures. In particular, you should ensure that your rigid-flex PCB is drilled to the appropriate depth and that the copper layers are of an even thickness. Additionally, you should avoid stacked copper traces. Stacked traces reduce the flexibility of a flex circuit and increase stress on copper, which can cause I-beaming. You should use staggered traces on multilayer flex circuits to avoid this issue.

Other IPC-6013 guidelines to consider include minimizing the number of layers, using conductive pads instead of vias for all connections, and selecting the best plating technique. Choosing pad-only plating (button plating) can help you save money because it eliminates the need for the extra copper that is required by panel plating. This method is also faster and allows you to achieve better etch yields with smaller traces.

Lastly, you should be sure to design your rigid-flex PCBs for manufacturing and assembly, keeping in mind that your PCB will undergo significant mechanical stress during these stages. For example, the rigid-flex area of your PCB should be free of drilled holes and other obstructions, so that it is easy to solder and inspect.

If you follow the above guidelines, you can be confident that your rigid-flex PCB will meet or exceed your design and performance specifications. In addition, you will be able to take advantage of the many cost savings and benefits that a rigid-flex PCB can offer your business. Contact Bittele Electronics to learn more about our rigid-flex PCB solutions or to request a quote. Our team of dedicated engineers is here to help you find a solution that’s right for your project.