Ultra-fast recovery diode is a kind of semiconductor diode with good switching characteristics and ultra-short reverse recovery time, which is often used to give high-frequency inverter device switching device for current continuity, absorption, clamping, isolation, output and input rectifiers, so as to give full play to the function of switching device. Ultra-fast recovery diode is an important device indispensable for the development of high-frequency and high-frequency equipment solid state.