When it comes to the Semiconductor industry, it has two major branches, namely integrated circuits and discrete devices. Discrete devices, as a very important basic component product, can achieve rectification, voltage stabilization, switching, and mixing functions in electronic devices. They have a wide range of applications and large amounts of usage, and are widely used in consumer electronics, computers, communication networks, automotive electronics, electronic instruments and meters, LED displays, power management, industrial and automatic control fields.

Discrete devices include semiconductor diodes, transistors, MOSFETs, bridge rectifiers, thyristors, IGBTs, TVS, bridge stack optoelectronic devices, etc. A diode is a very common discrete device, which is a dual electrode electronic component with asymmetric conductivity. The ideal diode has zero resistance between the two electrodes (anode and cathode) when conducting in the forward direction, and infinite resistance when conducting in the reverse direction, meaning that current is only allowed to flow through the diode from a single direction. Common diodes include rectifier diodes, switching diodes, Schottky diodes, Zener diodes, TVS diodes, high-frequency diodes, etc.