Report on 4H–SiC JTE Schottky diodes

4H–SiC Schottky diodes with and without Junction Terminate Extension (JTE) have been fabricated using Ni for contact and boron for p+ implant. Electrical characterization showed a rectifying behaviour in the on-state. In the reverse mode, the un-terminated Schottky diode demonstrated a breakdown voltage of approximately 200 V, while the JTE structure exhibited a significant improved breakdown performance, and the blocking voltage over 450 V. Optical microscope examination revealed the surface flashover failure located at the metal contact periphery for the un-terminated Schottky diode, while the JTE structure failed in the central area of the metal contact. Both the experimental and theoretical analyses confirmed the JTE structure enhancement on the reliability for SiC Schottky diode performance in reverse mode.