Even if SiC MOSFETs technology has undergone huge progress in last years, there are some issues still open, such as high traps density at the SiO2/SiC interface. This work focuses on the measurement of the Gate capacitance when a DC bias is applied between Drain and Source to characterize the SiO2/SiC interface. The experimental curves, performed on a commercial SiC power MOSFET, exhibit a peak when the Gate voltage approaches the threshold voltage. Such peak is analyzed through TCAD simulations and its origin is addressed. Numerical analysis shows that this peak is associated to the displacement current, with a strong dependence on the traps concentration at the SiO2/SiC interface.

SiC MOSFET C-V Characteristics with Positive Biased Drain

Matacena I.;Maresca L.;Riccio M.;Irace A.;Breglio G.;Daliento S.;
2022

Abstract

Even if SiC MOSFETs technology has undergone huge progress in last years, there are some issues still open, such as high traps density at the SiO2/SiC interface. This work focuses on the measurement of the Gate capacitance when a DC bias is applied between Drain and Source to characterize the SiO2/SiC interface. The experimental curves, performed on a commercial SiC power MOSFET, exhibit a peak when the Gate voltage approaches the threshold voltage. Such peak is analyzed through TCAD simulations and its origin is addressed. Numerical analysis shows that this peak is associated to the displacement current, with a strong dependence on the traps concentration at the SiO2/SiC interface.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/906181
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