Nitrogen-implanted SiC diodes using high-temperature implantation

Abstract

6H-SiC diodes fabricated using high-temperature nitrogen implantation up to 1000 degrees C are reported. Diodes were formed by RIE etching a 0.8- mu m-deep mesa across the N/sup +//P junction using NF/sub 3//O/sub 2/ with an aluminum transfer mask. The junction was passivated with a deposited SiO/sub 2/ layer 0.6 mu m thick. Contacts were made to N/sup +/ and P regions with thin nickel and aluminum layers, respectively, followed by a short anneal between 900 and 1000 degrees C. These diodes have reverse-bias leakage at 25 degrees C as low as 5*10/sup -11/ A/cm/sup 2/ at 10 V.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>