ZENER DIODE

摘要

A Zener diode (10) includes a semiconductor substrate (12), an anode electrode (40) and a cathode electrode (42). The semiconductor substrate (12) includes a p-type anode region (20), an n-type current path region (22) and a drift region (24). The p-type anode region (20) is connected to the anode electrode (40). The n-type current path region (22) is in contact with the anode region (20). The drift region (24) is in contact with the anode region (20) and the current path region (22). The drift region (24) is of an n type. The drift region (24) has a lower n-type impurity concentration than the current path region (22). The drift region (24) is connected to the cathode electrode (42) directly or via another n-type region (26).