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Abstract:
In silicon carbide (SiC) planar insulated-gate bipolar transistor (IGBT), a large distance between neighboring p-bodies is beneficial to enhance the on-state conductivity modulation, but will expose the gate oxide to high electric field in off-state. With p-bodies placed closer, the gate oxide field is reduced, but the conductivity modulation is suppressed. In this work, a new SiC planar IGBT with oxide shield is proposed and studied by TCAD simulations. The proposed SiC IGBT achieves improved trade-off between on-state voltage drop (V-ON) and maximum gate oxide electric field (Eox-m). When a quite larger distance between neighboring p-bodies is adopted in the proposed SiC IGBT, a low VON is obtained, while the Eox-m can be kept at a small value with the oxide shielding structures protecting the gate oxide. Switching characteristics are also studied, and the proposed SiC-IGBT delivers much better trade-off between turn-off energy loss (E-OFF) and VON than the conventional SiC planar IGBT.
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Source :
IEEE JOURNAL OF THE ELECTRON DEVICES SOCIETY
ISSN: 2168-6734
Year: 2023
Volume: 11
Page: 198-203
2 . 3 0 0
JCR@2022
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 0
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