SMT is the abbreviation for Surface Mounted Technology, the most popular Technology and process in the electronic assembly industry. Electronic circuit Surface Mount Technology (SMT) is called Surface Mount or Surface Mount Technology. It is a kind of Circuit assembly technology that installs leadless or short lead surface assembly components (SMC/SMD in Chinese) on the surface of Printed Circuit Board (PCB) or other substrate surface, and then welds and assembles by means of reflow welding or dip welding.