1. What is Rigid PCB Rigid PCB is the most widely‑used printed circuit board built on FR‑4 substrate with solid mechanical stiffness. It supports multi‑layer stack‑up, various surface finishes and controlled‑impedance design. Rigid PCBs serve as stable carriers for SMT and THT components, extensively adopted in consumer electronics, industrial controllers and power supply units, and can be produced for both prototype validation and large‑volume mass production.
2. Flexible PCB (FPC) Overview Flexible PCB, also known as FPC, uses polyimide base material to achieve repeated bending and folding performance. Its lightweight and thin‑body feature helps save internal space of compact devices. FPC can adapt to 3D assembly structures, commonly applied in wearable devices, display modules and camera connections, delivering stable electrical performance under continuous mechanical movement.
