Bevel Junction Termination Extension—A New Edge Termination Technique for 4H-SiC High-Voltage Devices

A new edge termination method, referred to as a bevel junction termination extension (Bevel-JTE), is presented for high-voltage silicon carbide devices. The 4H-SiC PiN rectifiers, with a breakdown voltage of 1600 V (~95% of the theoretical value), were fabricated using Bevel-JTEs. The Bevel-JTE technique significantly reduces the chip size by decreasing space occupied by edge termination while providing broad process latitude for parameter variations, such as implantation dose and activation anneal condition.