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SMD LED (surface mounted device LED) means surface mounted light emitting diodes. SMD patches can help improve production efficiency and be used in different facilities. SMD LED is a solid-state semiconductor device that can directly convert electricity into light. The core of SMD LED is a semiconductor wafer fixed to a bracket, with one end connected to the negative electrode and the other end connected to the positive electrode of the power supply. The entire wafer is packaged with epoxy resin or silicone.