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Low ON-Resistance SiC Trench/Planar MOSFET With Reduced OFF-State Oxide Field and Low Gate Charges.
- Source :
- IEEE Electron Device Letters; Nov2016, Vol. 37 Issue 11, p1458-1461, 4p
- Publication Year :
- 2016
-
Abstract
- We propose a SiC trench/planar MOSFET (TP-MOS) which features a trench channel and a planar channel in one half-cell. Numerical simulations with Sentaurus TCAD have been carried out to study the proposed device architecture. Compared with traditional planar MOSFET (P-MOS), the TP-MOS has a much lower R \mathrm {ON} owing to the increased channel density. Unlike traditional trench MOSFET (T-MOS) which enables a higher channel density at the price of a high bottom-oxide field in the high-voltage OFF-state, the TP-MOS features bottom p-bases as in the P-MOS that protect the gate oxide from high electric field. The OFF-state oxide field in the TP-MOS is found to be even lower than the P-MOS. In addition, the TP-MOS boasts a low feedback capacitance ( C \mathrm {rss}) and gate-to-drain charge ( Q \mathrm {GD}) , since the coupling between the gate and the drain is suppressed by the collective effects of the top p-bases and the bottom p-bases. The Q \mathrm {G} of the TP-MOS is nearly the same as the P-MOS, and is much smaller than the T-MOS. Superior figures of merit ( Q \mathrm {G}\times {R} \mathrm {ON} and Q \mathrm {GD}\times {R} \mathrm {ON}) are achieved in the TP-MOS. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 07413106
- Volume :
- 37
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- IEEE Electron Device Letters
- Publication Type :
- Academic Journal
- Accession number :
- 119032764
- Full Text :
- https://doi.org/10.1109/LED.2016.2609599