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Quantified density of performance-degrading near-interface traps in SiC MOSFETs
Mayank Chaturvedi1,2, Sima Dimitrijev3,4, Daniel Haasmann3,4
1Queensland Micro- and Nanotechnology Centre, Griffith University, Brisbane, QLD, 4111, Australia. mayank.chaturvedi@griffithuni.edu.au.
Abstract:
Characterization of near-interface traps (NITs) in commercial SiC metal-oxide-semiconductor field-effect transistors (MOSFETs) is essential because they adversely impact both performance and reliability by reducing the channel carrier mobility and causing threshold-voltage drift. In this work, we have applied a newly developed integrated-charge technique to measure the density of NITs that are active in the above-threshold region of commercial SiC MOSFETs. The results demonstrate that NITs trap about 10% of the channel electrons for longer than 500 ns.
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