A Rigid PCB (Printed Circuit Board) is a type of circuit board made from inflexible substrate materials, known for its structural strength and long-term stability. Unlike flexible PCBs, rigid PCBs maintain a fixed shape, providing a solid mounting platform for electronic components.
Advantages
Rigid PCB using glass fiber (FR4), epoxy resin, and other high-strength rigid materials, multi-layer stacking design to ensure circuit reliability and stability, with excellent heat dissipation, suitable for high-power applications. It supports high-density wiring design for complex circuits, suitable for mass production and a cheaper price.
Key Manufacturing Process
Substrate preparation, Selection of rigid base materials (e.g., FR4)
Pattern transfer, Circuit design transferred onto copper layers
Etching process, Excess copper removed to form conductive traces
Lamination, Multi-layer bonding under heat and pressure
Surface finishing, Application of solder mask and silkscreen
Primary Applications
Due to their reliability, rigid PCBs are widely used in
Computer hardware: Motherboards, graphics cards, and other core components
Industrial equipment: Control systems, power supplies
Medical electronics: Diagnostic machines, monitoring devices
Automotive electronics: ECUs, navigation systems
Consumer electronics: TVs, audio systems, and home appliances
Future Development Trends
Rigid PCBs are irreplaceable in applications requiring structural stability and durability. Their mature manufacturing process, reliable performance, and relatively low cost make them the preferred circuit solution for most electronic products. As devices demand higher performance, rigid PCB technology continues to evolve, meeting the growing need for high-density interconnects.