This type of board uses fiberglass cloth as reinforcement, epoxy resin as adhesive, and a copper foil layer is applied to the surface through a copper-clad process, forming the basic structure of the circuit board. The widespread use of FR4 PCBs in the electronics field is primarily due to their superior performance characteristics.
FR4 PCBs cover almost all areas of electronic equipment. Whether it's consumer electronics such as mobile phones, computers, and tablets, or industrial control equipment, communication equipment, and automotive electronics, all rely on FR4 PCBs. As the substrate of the circuit board, it supports the installation and connection of various electronic components and is a key component for the normal operation of electronic equipment.