4Layer Flexible FPC PCB Board Assembly with ENIG Finish

Flexible Printed Circuit (FPC) is a type of circuit board made of flexible copper clad plate as the substrate. It is used as a medium for signal transmission in the connection of electronic products, and has the characteristics of high wiring assembly density, good bending performance, lightweight, and flexible process. FPC can generally be divided into:

PCB soft board and hard board are two common types of boards in the electronic industry, playing different roles in board design and manufacturing processes. Although their names are similar, their design and manufacturing methods are actually different.

PCB soft board is a type of flexible circuit board made of flexible materials such as polyester film, polytetrafluoroethylene film, etc. This type of board is often used in applications that require bending and bending, such as in high-precision and lightweight electronic devices, watches, automotive bodies, and other fields.

PCB hard boards are circuit boards made of hard materials such as glass fiber reinforced resin. These types of boards are typically used for applications that require stronger and more robust performance, such as inside computers or in some mechanical and industrial products.

With the development of electrification and intelligence in automobiles, the advantages of FPC in bending, weight reduction, and high degree of automation are further reflected. The usage of FPC in the automotive field is constantly increasing, covering relevant scenarios such as:

The rapid development of new energy vehicles has led to a significant increase in demand for FPCs for on-board power batteries. The acquisition line is an important component required for the BMS system of new energy vehicles, which monitors the voltage and temperature of the new energy power battery cells.

Compared to copper wire harnesses, FPC has outstanding advantages in safety, lightweight, and layout due to its high integration, ultra-thin thickness, and ultra-softness. The trend of replacing copper wire harnesses with FPC is clear.

Rigid-flex circuits are a hybrid construction flex circuit consisting of rigid and flexible substrates which are laminated together into a single structure. The layers of a rigid flex are normally electrically interconnected by means of plated through holes.

Flexible printed circuits (FPC) are made with a photolithographic technology. An alternative way of making flexible foil circuits or flexible flat cables (FFCs) is laminating very thin (0.07 mm) copper strips in between two layers of PET.