Influence of Lateral Straggling of Implated Aluminum Ions on High Voltage 4H-SiC Device Edge Termination Design

This paper presents the analysis of Aluminum profile implanted into 4H-SiC with low background doping concentration. A strong lateral straggling effect was discovered with secondary electron potential contrast (SEPC) method, and analyzed by Sentaurus Monto Carlo simulations. The effect of lateral straggling was included in the edge termination design using Sentaurus TCAD simulation tool, and the results are compared with design not including the lateral straggling effect. The effect of interface charge on the electric field distribution and breakdown voltage of different 10 kV device edge termination designs was compared and analyzed.