What is the structure principle of Schottky diode? — SUNMATE

What is the structure principle of Schottky diode and how does it work in the circuit?

The structural principle of Schottky rectifier diode is very different from that of PN junction rectifier tube. Generally, PN junction rectifier tube is called junction rectifier tube, while metal semi conduit rectifier tube is called Schottky rectifier tube. In recent years, Aluminum Silicon Schottky diode manufactured by silicon plane process has also been invented, which can not only save precious metals, greatly reduce costs, but also improve the consistency of parameters.

Schottky diode uses only one carrier (electron) to transport charge, and there is no accumulation of excess minority carriers outside the barrier. Therefore, there is no charge storage problem (qrr → 0), so the switching characteristics are significantly improved. The reverse recovery time can be shortened to less than 10ns. However, its reverse withstand voltage value is low, generally no more than 100V. Therefore, it is suitable to work under low voltage and high current. The efficiency of low-voltage and high current rectifier (or freewheeling) circuit can be improved by using its low-voltage drop characteristics.