PWM-induced lifetime enhancement in commercial 4H-SiC MOSFET gate oxides and the associated physical mechanisms of interface traps
Silicon carbide (SiC) power metal-oxide-semiconductor field-effect transistors are increasingly operated under high-frequency pulse-width-modulated (PWM) gate drive, yet gate-oxide reliability is still qualified almost exclusively under direct-current (DC) stress. This work reports a controlled comparison of gate-oxide...