PCB works as support of electronic component, it is also the carrier of connected components. The main function is support and connecting the components on its own and let them work as pre-designed circuit connection, also called "the mother of electro components".
Considering the importance of printed circuit board function, the death of him is far far away, because there is no replacement object, even similar onces. However, pressure also here, environment protection is a hot topic in PCB industry. The China government is being more strict as time moves--we need to aware there is environment pollution during the production of circuit board, PCB manufacturers need to reduce pollution output and put more energy on pollution cleaning instead of moving factory to a new place.
Only in this way, the China PCB making industry can keep growing in a healthy way.