SMT is surface mount technology (short for Surface Mounted Technology) and is currently the most popular technology and process in the electronics assembly industry. Surface Mount Technology (SMT) is called surface mount or surface mount technology. It is a type of leadless or short lead surface mount component (referred to as SMC/SMD, Chinese called chip component) mounted on the surface of a printed circuit board (PCB) or other substrate surface. A circuit assembly technique in which welding is assembled by reflow or dip soldering.
SMT common electronic component classification
The following data is for reference only, if there is discrepancies
Active components - TR, IC, DIODE
Passive components - R, C, L
Semiconductor-TR (bipolar), IC, DIODE (diode)