| Autor: |
Khaled Ahmeda, Brendan Ubochi, Brahim Benbakhti, Steven J. Duffy, Ali Soltani, Wei Dong Zhang, Karol Kalna |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
IEEE Access, Vol 5, Pp 20946-20952 (2017) |
| Druh dokumentu: |
article |
| ISSN: |
2169-3536 |
| DOI: |
10.1109/ACCESS.2017.2755984 |
| Popis: |
The interplay of self-heating and polarization affecting resistance is studied in AlGaN/GaN transmission line model (TLM) heterostructures with a scaled source-to-drain distance. This paper is based on meticulously calibrated TCAD simulations against I-V experimental data using an electro-thermal model. The electro-thermal simulations show hot-spots (with peak temperature in a range of ~566 K-373 K) at the edge of the drain contact due to a large electric field. The electrical stress on Ohmic contacts reduces the total polarization, leading to the inverse/converse piezoelectric effect. This inverse effect decreases the polarization by 7%, 10%, and 17% during a scaling of the source-to-drain distance in the 12 μm, 8 μm, and 4 μm TLM heterostructures, respectively, when compared with the largest 18-μm heterostructure. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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