By How to Create Rigid Flex PCBs
Rigid flex circuit boards offer a combination of the best aspects of rigid and flexible printed circuit board technology. They can be manufactured in smaller packages with the ability to bend and fold around components, while maintaining a solid copper structure. Moreover, these circuits can provide cost savings by enabling a reduction in overall system weight.
Rigid-flex PCBs are designed to withstand repeated bending cycles without suffering from permanent damage or loss of functionality. This is achieved by incorporating a rigid section with the flex area of the circuit and by using special materials that can withstand high levels of shock, vibration, and temperature.
These features make the rigid flex circuit ideal for dynamic applications, such as a folding cell phone or aerospace electronics. These circuits also replace wire harnesses that are heavier and bulkier. Creating a rigid-flex circuit is not only possible but also straightforward with the use of the right software. Fortunately, the industry-standard design tools for both rigid and flexible designs are available in one software package, which makes it easy to build and prepare these types of circuit boards for manufacturing.
How to Create Rigid Flex PCBs – PCB Prototype the Easy Way
In order to create a rigid-flex circuit, the designer starts by adding all the necessary components and connectors as per the product specifications. Once these are added, the next step is to create the schematic diagram. At this stage, the designer must decide on the material for the flex and rigid sections of the circuit. Rigid-flex circuits are usually made from FR-4 or similar materials that can withstand high temperatures and shocks.
Once the schematic is complete, it is time to start laying out the circuit. The designer must choose between a small or larger radius when making the bends in the flex section of the circuit. Choosing the appropriate radius will minimize stress on the circuit and reduce the risk of shorting or a breakdown in the copper layers. Moreover, it is important to use stiffeners and anchors to help avoid any mechanical damage to the flex portion of the circuit.
After the circuit is laid out, the designer must route the traces. This will include connecting all the segments of the path. In addition to the routing of traces, the designer must add any labels, identifiers, or markings to the circuit. This will make it easier for the manufacturer to assemble and install the PCBs in the final product.
Finally, the flex section of the circuit must be adhered temporarily to the rigid section using epoxy or another adhesive. This is done in order to keep the flex circuit intact during manufacturing and assembly. The rigid and flex sections are then assembled together and soldered in place.
Rigid flex circuit boards are more expensive than traditional rigid printed circuit board assemblies, but they can provide many advantages. Rigid flex circuits are also easier to test, which can save valuable development time. Additionally, they can reduce the total system weight by reducing the number of connectors and parts required.