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Performance and VTH Stability in E-Mode GaN Fully Recessed MIS-FETs and Partially Recessed MIS-HEMTs With LPCVD-SiNx/PECVD-SiNx Gate Dielectric Stack.
- Source :
- IEEE Transactions on Electron Devices; Aug2018, Vol. 65 Issue 8, p3185-3191, 7p
- Publication Year :
- 2018
-
Abstract
- In this paper, we carried out a systematic comparison between the enhancement-mode GaN-based fully recessed metal-insulator-semiconductor field-effect transistors (MIS-FETs) and partially recessed MIS-high-electron-mobility transistors (MIS-HEMTs) with the same gate dielectric stack (LPCVD-SiNx/PECVD-SiNx) that has delivered promising long-term reliability and stability. Despite a moderately larger on-resistance (${R}_{ \mathrm{ON}}$), the MIS-FETs deliver superior ${V}_{\text {TH}}$ uniformity and thermal stability. Under long-term gate bias stress, both the MIS-HEMT and MIS-FET deliver similar small positive-bias temperature instability, while the negative-bias temperature instability of the MIS-HEMT is much larger than that of MIS-FET. The MIS-FET also delivers a higher ${V}_{\text {TH}}$ stability than the MIS-HEMT under dynamic gate bias stress. It is suggested that the differences in ${V}_{\text {TH}}$ stability mainly originate from the different spatial separation between the trap states and the conducting channel, with it being larger in MIS-HEMT than in MIS-FET. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189383
- Volume :
- 65
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Electron Devices
- Publication Type :
- Academic Journal
- Accession number :
- 132684408
- Full Text :
- https://doi.org/10.1109/TED.2018.2850042