The birth and development of FPC and PCB have spawned a new product: rigidflex board. Rigid-flex board, as the name implies, is a combination of a flexible board and a rigid board. It is a clever design and connection of a thin flexible bottom layer and a rigid bottom layer, and then it is laminated to form a PCB. It changed the traditional flat design concept and expanded to the three-dimensional space concept, which brought great convenience to the design of electronic products.