best practices for designing PCB rigid flex
As PCB rigid flex becomes more popular for flexible and wearable electronics, it’s important to keep a few rigid flex design best practices in mind. These practices can help ensure your pcb rigid flex circuit is as reliable as possible when bending and moving during use.
One important tip is to make sure your traces and pads are thick enough. This helps to reduce stress and strain on the copper during flexing. It’s also a good idea to use dummy traces to help distribute the stress over the entire flex area.
Another good practice is to avoid using plated through holes (PTH) in flex zones. This can cause stress and cracking, especially when using adhesive-based flex base materials. If you do use PTHs in flex zones, be sure to use anchors and teardrops to strengthen them. You should also try to limit the number of plated through holes in flex areas to two per section, unless a specific design requirement dictates otherwise.
What are the best practices for designing PCB rigid flex?
When designing your pcb rigid flex, be sure to use the correct layer count for both flex and rigid sections. Using an odd layer count construction can help reduce the thickness of the flex zone, which results in improved flexibility and mechanical bending capabilities. It’s also a good idea for flex boards to incorporate a cross-hatched ground plane in the flex zone. This will improve the control of stripline impedance and allow you to route more connections in the flex area without adding extra layers.
A final flex PCB design tip is to use stiffeners in critical flex areas. These can help to relieve stress, balance weight, and increase abrasion resistance. Stiffeners can be made from a variety of materials, such as aluminum or stainless steel. They are attached to the flex and rigid areas of the board using thermally cured acrylic or pressure-sensitive adhesives.
When you’re ready to begin designing your PCB rigid flex, be sure to consult with an experienced electronic contract manufacturer (ECM) for advice. A reputable ECM can help you navigate the complexities of rigid-flex designs and ensure your products are built to the highest quality standards.
Printed Circuit Boards (PCBs) are integral to modern electronics, and among the many variations available, the rigid-flex PCB is a unique and versatile design that combines elements of both rigid and flexible circuit boards. This hybrid construction offers numerous advantages, making it an essential solution in applications requiring complex design capabilities, space-saving, and durability.
Rigid-flex PCBs consist of a combination of rigid and flexible circuit layers that are connected to each other. The flexible section allows the board to bend and twist, while the rigid portion provides structural support. The layers are laminated together, forming a single integrated unit. This construction allows for a three-dimensional design that can conform to the shape of the device or product in which it is used.
Having the right team to handle your rigid flex design can make all the difference when it comes to successful manufacturing. With a little planning and collaboration, your flex circuit can be the next great innovation to benefit your industry. Contact Levison Enterprises today to learn more about how we can help you bring your ideas to life.
