A rigid flex PCB is a type of printed circuit board that integrates both rigid and flexible materials into a single assembly. This technology allows parts of the board to be flexible while maintaining rigid sections, enabling complex designs that can fit into compact spaces. Rigid flex PCBs are particularly beneficial in applications where space is at a premium and where movement is required, such as in wearables or portable electronic devices.

The structure of a rigid flex PCB typically consists of multiple layers, including rigid layers made from traditional PCB materials and flexible layers created from polyimide or other flexible materials. This combination allows for versatility in design, enabling manufacturers to create interconnections in three-dimensional shapes while maintaining the durability of rigid boards.