Abstract
The threshold voltage (Vth) instability of 4H-SiC MOSFETs was investigated using high-speed IV measurement instrument. DC stress measurement of wide time span ranging from 10-6 to 103 s without relaxation effect was conducted. The high-speed measurement allowed of dynamic ΔVth measurement under pulsed AC gate bias stress. We investigated effects of NO POA in gate oxidation process on the Vth instabilities.
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