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金屬,電子從高濃度的B擴散,顯然沒有金屬a的孔,並且隨著電子的擴散。 A中的電子還將從A→B產生漂移運動,從而削弱由於擴散運動而形成的電場。當建立一定寬度的空間電荷區域時,由電場引起的電子漂移運動和由不同濃度引起的電子擴散運動達到相對平衡,形成了Schottky屏障。