The advantages of surface mount technology include: high assembly density, reducing the size of the circuit board; good anti-interference, reducing the distribution parameters; high-speed signal transmission, due to the compact structure, short connecting lines; simplify the production process, reduce production costs, and facilitate the automation of production; high efficiency and high reliability, suitable for automated production and improve the yield of electronic products.

A light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons.