The SMT production line is also called Surface Mount Technology (SMT). It is a new generation of electronic assembly technology developed hybrid integrated circuit technology. It features surface mount technology reflow soldering technology. Generation of assembly technology. The main equipments of SMT production line are: printing machine, placement machine (upper surface electronic components), reflow soldering, plug-in unit, wave furnace, test packaging. The extensive application of SMT has promoted the miniaturization multi-function of electronic products, provided conditions for mass production low defect rate production. SMT is the surface assembly technology, which is a new generation of electronic assembly technology developed hybrid integrated circuit technology.