Comparison of SiO2-based double passivation scheme by e-beam evaporation and PECVD for surface passivation and gate oxide in AlGaN/GaN HEMTs
Double-insulator scheme by different deposition methods are first studied. E-beam-based SiO2 shows the best result due to the reduction of gate leakage current. E-beam-based SiO2 and double scheme form a competitive insulator for HEMT. Authors plan to try other tool, such as LPCVD, TCVD and ADM to obtain optimal result.
surface passivation gate oxide high electron mobility transistor (hemt) electron beam (e-beam) evaporation plasma-enhanced chemical vapor deposition (pecvd)