Modern electronics rarely sit still. Wearable health monitors bend around a wrist, automotive sensors survive constant vibration, and medical implants move with the body. Rigid boards cannot meet those demands. Flexible PCB manufacturing services have become the backbone of compact, lightweight, and durable electronic designs. Whether the requirement is a simple single-layer flex cable or a complex multilayer rigid-flex assembly, success depends on three things: selecting the right materials, controlling the fabrication process, and applying proven flex-specific design rules. In this Flexible PCB Manufacturing Services: Materials, Fabrication, and Design Guide, the focus is on practical, engineering-led decisions that improve yield, extend flex life, and reduce costly redesigns. From polyimide substrates…