Flex PCB is short for "Soft Board". It is commonly called FPC in the industry. It is a printed circuit board made of flexible insulation materials (mainly polyimide or polyester film). It has many advantages that hard printed circuit boards do not have. For example, it can bend, wind and fold freely. The use of Flex PCB can greatly reduce the volume of electronic products, which is suitable for the development of electronic products in the direction of high density, miniaturization and high reliability. Therefore, Flex PCB is widely used in space, military, mobile communication, laptop, computer peripherals, PDA, digital camera and other fields or products.

Flex PCB also has good heat dissipation and solderability, and is easy to assemble and low overall cost. Flexible printed circuit boards can be divided into one-sided, two-sided and multi-layer boards. The base material used is mainly polyimide copper clad sheet. This material has high heat resistance, good dimension stability, and the final product is made by pressing the coating with both mechanical protection and good electrical insulation. The surface and inner conductors of double-sided and multi-layer printed circuit boards are metallized to achieve the electrical connection of the inner and outer circuit. Flex PCB can be divided into four functions, Lead Line, Printed Circuit, Connector, and Integration of Function. They are used in a wide range of applications, including computers, computer peripheral assistant systems, consumer appliances and automobiles.

Flexible circuits provide excellent electrical performance to meet the design needs of smaller and more dense installations, and help reduce assembly processes and enhance reliability. Flex PCB is the only solution to meet the miniaturization and mobility requirements of electronic products. It can bend, wind, fold freely, withstand millions of dynamic bends without damaging the wires, can be arranged according to the spatial layout requirements, and can move and stretch freely in three-dimensional space to achieve the integration of component assembly and wire connection. Flex PCB can greatly reduce the volume and weight of electronic products, which is suitable for the development of electronic products in the direction of high density, miniaturization and high reliability.