The irreplaceability and necessity of PCBs in electronic products determine downstream applications.Overall, the PCBs are mainly used in the field of computer, communications, consumer electronics which is in charge of 70% for PCB applications. In addition, PCB  are  gradually used in industrial, medical and military.PCB and global economic development is positively correlated.PCB industry is growing from 2003 for the developments of communications equipments, computers.Under the influence of the financial crisis in 2009, peak industry showed negative growth.PCBs will have new development from 2009.In contrast, PCBs have great achievements in the domestic.At present, China has become the world's largest PCB producer. By 2010, China's PCB production value reached $ 18.5 billion, accounting for 36.2% in the global market.This trend will will be kept with the further development of the domestic telecommunications industry.It is forecasted China's PCB industry will maintain rapid growth in the next five years, compounded annual growth rate will reach 10.8% from 2010 to 2015.