SMT is the abbreviation of SurfaceMountTechnology, which means surface mount technology in Chinese. SMT is a new generation of electronic assembly technology, and it is also a popular technology and process in the electronic assembly industry at present. It compresses traditional electronic components into devices with a volume of only a few tenths.

2.SMT history

Surface mount is not a new concept, it originated from earlier processes, such as plain mounting and mixed mounting.

At first, the electronic circuit was assembled by point-to-point wiring, and there was no substrate at all. The packaging of the first semiconductor device adopts radial pins, which are inserted into the through holes of a single circuit board that has been used for resistor and capacitor packaging. In 1950s, surface mount components were used in the military field with high reliability. In 1960s, hybrid technology was widely used. In 1970s, passive components were widely used under the influence of Japanese consumer electronic products. And active components have been widely used in recent thirty years.

3.SMT characteristics

Electronic products have high assembly density, small volume and light weight. The size and weight of the patch component are only about110 of the traditional plug-in. After SMT, the volume of general electronic products is reduced by 40%~60% and the weight is reduced by 60%~80%.

SMT products have high reliability and strong anti-vibration ability; Low solder joint defect rate and good high frequency characteristics; Reduce electromagnetic and radio frequency interference.

It is easy to realize automation and improve production efficiency. Reduce the cost by 30%~50%, and save materials, energy, equipment, manpower and time.

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4.SMT advantages

Electronic products pursue miniaturization, and the previously used punch plug-ins can no longer be reduced; Electronic products are more versatile, and the integrated circuits (ic) used have no perforated components, especially large-scale and highly integrated IC, so surface-mounted components have to be used.

For mass production and automatic production, factories should produce high-quality products at low cost to meet customer needs and strengthen market competitiveness; The revolution of electronic technology is imperative: the development of electronic components, the development of integrated circuits (ic) and the diversified application of semiconductor materials all make SMT technology, which pursues the international trend, show its advantages.