The difference is as follows:
1, SMD is a component, SMT is a technology and process, one is an object, one is a non-object.
2, the role is different, SMD is used after the first automated machines are introduced, they can place some simple pin components, and SMT is a pin-less or short-lead surface assembly components installed on the surface of the printed circuit board circuit mounting technology.
SMD; It is the abbreviation of Surface Mounted Devices, meaning: Surface Mount devices, it is one of the SMT(Surface Mount Technology) components. In the initial stage of the production of electronic circuit boards, through the hole assembly is completely completed by manual.
SMT: It is a pin-free or short-lead surface assembly component (referred to as SMC\/SMD, Chinese called chip components) installed on the surface of the Printed Circuit Board (PCB) or other substrate surface, by reflow or dip welding and other methods to weld the circuit assembly technology.
Extended information:
统计机器翻译
supplies consumed
1, the suction nozzle deformation, blockage, damage, insufficient vacuum pressure, air leakage, resulting in suction can not afford, take material is not correct, identification through and throwing material. Solution: NOZZLE requires a technician to check the device every day, test the nozzle, clean the nozzle and maintain the device regularly as planned.
2, the spring tension is not enough, the suction nozzle is not coordinated with the HOLD, and the material is not good. Solution: Maintain equipment regularly according to plan, check and replace vulnerable parts.
Difference: smd is the chip component, smt is the chip processing.