Electrical Characteristics of 10-kV 4H-SiC MPS Rectifiers with High Schottky Barrier Height
Abstract
This paper reports the study of the fabrication and characterization results of 10-kilo-volt (kV) 4H-SiC merged PiN/Schottky rectifiers. A metal contact process was developed to make the Schottky contact on n-type SiC and ohmic contact on p-type SiC at the same time. The diodes with different Schottky contact width were fabricated and characterized for comparison. With the improvement quality of the Schottky contact and the passivation layer, the devices show low leakage current up to 10 kV. The on-state characteristics from room temperature to elevated temperature (423 K) were demonstrated and compared between structures with different Schottky contact width.
- Publication:
-
Journal of Electronic Materials
- Pub Date:
- February 2018
- DOI:
- 10.1007/s11664-017-5812-2
- Bibcode:
- 2018JEMat..47..927J
- Keywords:
-
- Silicon carbide;
- high voltage;
- Schottky barrier height;
- high-temperature electrical performance