Side-by-side contrasting PCB design: Left gold board with hole array & blue zones, right blue-gold board with intricate traces, both featuring rectangular reserved areas for modular prototyping or dedicated interface applications

PCB Rigid Board Printed Circuit Board Double-sided blue solder mask with high-density multi-layer routing, featuring complex cutouts, pad arrays, and edge connectors, supporting double-sided SMT assembly and high-speed signal transmission. Ideal for  communication modules, consumer electronics control boards, and electronic products requiring compact high-performance double-sided integration.