The expansion of integrated circuit applications is driving chip costs down. To respond to the lower price the lower price expectations, manufacturers bring Plastic packages which is cost less expensive packaging solutions. Today although the electronic packaging industry there are still many enterprises were to have lead solder, but this does not preclude the "lead-free" has become the main topic of electronic materials and microelectronics. In this transitional period, lead and lead-free both assemble on the plastic package in the field of application is already unavoidable. Problem existed in lead or lead-free materials, technology, equipment, system compatibility and other issues.