AI Article Synopsis
- - This paper examines how positive bias temperature instability (PBTI) affects the threshold voltage shift (ΔV) in silicon carbide (SiC) power MOSFETs at high temperatures (150 °C).
- - Two primary mechanisms are identified for ΔV: trapping in existing defects at the interface and the formation of new oxide defects, which occur at a specific energy level (~80 meV).
- - Different methods of analysis show consistent patterns in ΔV degradation across various gate stress voltages, offering valuable insights for improving the reliability of SiC MOSFETs.
Article Abstract
This paper investigates the threshold voltage shift (ΔV) induced by positive bias temperature instability (PBTI) in silicon carbide (SiC) power MOSFETs. By analyzing ΔV under various gate stress voltages (V) at 150 °C, distinct mechanisms are revealed: (i) trapping in the interface and/or border pre-existing defects and (ii) the creation of oxide defects and/or trapping in spatially deeper oxide states with an activation energy of ~80 meV. Notably, the adoption of different characterization methods highlights the distinct roles of these mechanisms. Moreover, the study demonstrates consistent behavior in permanent ΔV degradation across V levels using a power law model. Overall, these findings deepen the understanding of PBTI in SiC MOSFETs, providing insights for reliability optimization.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11279283 | PMC |
| http://dx.doi.org/10.3390/mi15070872 | DOI Listing |
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