There are many types of diodes, which can be divided into germanium diodes (Ge tubes) and silicon diodes (Si tubes) according to the semiconductor materials used. According to their different uses, they can be divided into detection diodes, rectifier diodes, voltage regulator diodes, switching diodes, isolation diodes, Schottky diodes, light-emitting diodes, silicon power switch diodes, rotating diodes, etc. According to the chip structure, it can be divided into point contact diodes, surface co