Rigid PCB are a type of traditional PCB that lacks the flexibility of their flexible PCB counterparts. Unlike flexible PCBs, rigid PCB cannot be twisted or folded into various shapes due to their
FR4 reinforced material
, which enhances stiffness. Rigid PCB consist of copper traces and pathways, merging on a single board to connect various components. The substrate of the board is made from rigid base materials, providing it with stiffness and strength. A prime example of a rigid PCB using rigid base material is a computer motherboard. Once manufactured, rigid PCB cannot be modified or folded into alternative shapes. Rigid PCB are more cost-effective compared to flexible PCBs and are widely utilized in various electronic products. Both flexible and rigid PCB have their limitations and advantages in terms of usability and availability. Both are employed to interconnect multiple electronic components on a circuit board.
For high-quality manufacturing of rigid PCB, consider choosing a reliable China rigid PCB board manufacturer. A multilayer rigid PCB manufacturer with expertise in single-sided rigid PCB can provide tailored solutions to meet specific requirements.
Rigid PCB are manufactured through a multi-layered process involving the use of various layers bonded together by adhesives and heat, creating a robust circuit board. The key layers and manufacturing materials for rigid PCB include:
Base Material Layer:
The base material layer, also known as substrate, is typically made of glass fiber. FR4, a common choice for substrate material, offers excellent rigidity and strength. Phenolic resin and epoxy resin can also serve as substrates, albeit with slightly lower performance compared to FR4. However, they are cost-effective and possess unique characteristics. Phenolic resin has a lower decomposition temperature, and prolonged exposure to soldering may lead to delamination.
The copper foil layer is pressed onto the top of the substrate using additional heat and adhesive. In most cases, both sides of the circuit board are coated with copper. However, some budget electronic products may feature a single-layer copper material. The thickness of the copper layer can be adjusted according to specific requirements, typically measured in ounces per square foot.
Solder Mask Layer:
The solder mask layer is situated above the copper layer. This layer adds insulation to the copper, preventing any conductive material from coming into contact with the copper layer and causing damage. The presence of the solder mask layer contributes to the stability and reliability of the circuit board.
The silkscreen layer is positioned above the solder mask layer and is used to add characters or symbols to the circuit board for enhanced readability. White is a common color for silkscreen printing, but other colors, such as gray, red, black, and yellow, can be chosen to increase design diversity and convey information effectively.
In summary, the manufacturing of rigid PCB involves carefully combining these layers to achieve the required electrical and mechanical properties, meeting the specific requirements of diverse applications.
For high-quality manufacturing of rigid PCB, consider choosing a reliable China rigid printed circuit board and China rigid PCB board manufacturer.