SMT SMD refers to the abbreviation of a series of processes that are processed on a PCB basis. PCB (Printed Circuit Board) is a printed circuit board.


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.


Under normal circumstances, the electronic products we use are designed by pcb plus various capacitors, resistors and other electronic components according to the design of the circuit diagram, so a variety of electrical appliances require a variety of different smt patch processing technology to process.


SMT basic process components: solder paste printing --> parts placement --> reflow soldering --> AOI optical inspection --> maintenance --> split board.


Some people may ask why it is so complicated to connect an electronic component. This is actually closely related to the development of our electronics industry. Today, electronic products are pursuing miniaturization. Can't shrink. Electronic products are more complete, and the integrated circuits (ICs) used have no perforated components, especially large-scale, highly integrated ICs, which have to use surface mount components. Product batching, production automation, the factory must produce high-quality products at low cost and high yield to meet customer needs and strengthen market competitiveness. The development of electronic components, the development of integrated circuits (IC), and the diversified application of semiconductor materials. The electronic science and technology revolution is imperative, chasing the international trend. It is conceivable that in the case of intel, amd and other international cpu, the production process of image processing device manufacturers is refined to 20 nanometers, the development of surface assembly technology and process of smt is also unacceptable.


Advantages of smt patch processing: high assembly density, small size and light weight of electronic products. The size and weight of patch components are only about 1/10 of that of traditional plug-in components. After SMT is generally used, the volume of electronic products is reduced by 40%~60. %, weight loss 60% ~ 80%. High reliability and strong anti-vibration ability. The solder joint defect rate is low. High frequency characteristics are good. Reduced electromagnetic and radio frequency interference. Easy to automate and increase productivity. Reduce costs by 30% to 50%. Save materials, energy, equipment, manpower, time, etc.