Simulation and experimental results on the forward JV characteristic of Al implanted 4HSiC pin diodes
In this work the forward JV characteristics of 4HSiC pin diodes are analysed by means of a physics based device simulator tuned by comparison to experimental results. The circular devices have a diameter of 350?m. The implanted anode region showed a plateau aluminium concentration of 61019cm?3 located at the surface with a profile edge located at 0.2?m and a profile tail crossing the n-type epilayer doping at 1.35?m. Al atom ionization efficiency was carefully taken into account during the simulations. The final devices showed good rectifying properties and at room temperature a diode current density close to 370A/cm2 could be measured at 5V. The simulation results were in good agreement with the experimental data taken at temperatures up to about 523K in the whole explored current range extending over nine orders of magnitude. Simulations also allowed to estimate the effect of a different p+ doping electrically effective profile on the device current handling capabilities.
jv characteristic 4hsic pin diode ion implantation doping profile junction depth