Schottky barrier diode

A Schottky barrier diode, also known as a hot carrier diode, is a semiconductor diode formed by the junction of a semiconductor and a metal. The name Schottky diode is derived from the German physicist Walter H. Schottky. It features a low forward voltage drop and extremely fast switching operation. The cat's whisker detector used in early radio applications and in the early invention of metal rectifiers is said to be the prototype of the Schottky diode. When a sufficient forward voltage is applied, current flows in the forward direction. While the standard forward voltage of a silicon p-n diode is 600-700 mV, the forward voltage of a Schottky diode is 150-450 mV. The lower forward voltage requirement of the Schottky diode enables faster switching speeds and improved system efficiency.