The name of the circuit board is: Ceramic circuit board, alumina ceramic circuit board, aluminum nitride ceramic circuit board, circuit board, PCB board, aluminum substrate, high-frequency plate, thick copper plate, impedance plate, PCB, ultra-thin circuit board, ultra-thin board, printing (copper etching technology) circuit board and so on. The circuit board makes the circuit mini and intuitive, which plays an important role in the mass production and optimization of the fixed circuit with electrical layout. The circuit board may be called a printed circuit board or printed circuit board, the English name is (Printed Circuit board) PCB, (Flexible Printed Circuit boards) FPC Circuit ( FPC circuit board is also known as Flexible Circuit board Flexible Board is made of polyimide or polyester film as a substrate with a highly reliable, excellent flexible printed circuit board. With high wiring density, light weight, thin thickness, good bending characteristics!) And soft and hard bonding board (Reechas,soft and hard combination plate)-FPC with the birth and development of PCB, gave birth to the soft and hard bonding board this new product. Therefore, the soft and hard bonding plate, is the flexible circuit board and hard circuit board, through the compaction and other processes, according to the relevant process requirements combined, the formation of FPC characteristics and PCB characteristics of the circuit board.