638 / 2019-03-21 22:05:18

A step trench and field limiting ring termination structure with n+ short anode region

trenched field limiting ring, short anode, Dual-GCT, peak electric field

全体主题 > Power Electronics

Abstract—A step trench and field limiting ring(FLR) termination structure with n+ short anode region is analyzed by using 2-dimensional numerical simulation in this paper. Take for 4.5kV Dual-GCT as an example, the improved structures with the whole and partial n+ short anode and the conventional structure without n+ short anode are compared, the results show that the partial n+ short anode can reduce the leakage current and the negative differential resistance effect. In addition, the partial n+ short anode structure can reduce the time of turn-off and has lower peak electric field during turn-off. Moreover, this design basically does not change the other characteristics of the device.