A Schottky diode is a metal-semiconductor device made of a noble metal (gold, silver, aluminum, platinum, etc. A as the positive electrode and an N-type semiconductor B as the negative electrode, and the potential barrier formed on the contact surface of the two has rectification characteristics. Because there are a large number of electrons in the N-type semiconductor and only a small amount of free electrons in the noble金属,电子从高浓度的B扩散,显然没有金属a的孔,并且随着电子的扩散。 A中的电子还将从A→B产生漂移运动,从而削弱由于扩散运动而形成的电场。当建立一定宽度的空间电荷区域时,由电场引起的电子漂移运动和由不同浓度引起的电子扩散运动达到相对平衡,形成了Schottky屏障。