Modeling the Reverse Gate-Leakage Current in GaN-Channel HFETs: Realistic Assessment of Fowler–Nordheim and Leakage at Mesa Sidewalls
Bibliographic record
Abstract
A model considering different leakage paths for describing the reverse gate leakage in mesa-isolated polar GaN-channel heterostructure field-effect transistors (HFETs) is presented. For AlGaN/GaN HFETs, it is illustrated that for small negative values of gate-source bias, gate leakage happens from the gate-covered mesa sidewalls to the 2-D electron gas (2-DEG). The bias and temperature dependences of the gate current show that the sidewall path to the 2-DEG is associated with the Poole-Frenkel electron emission. As the gate-source bias becomes more negative, electrons choose a different path to the 2-DEG. In this case, results corroborate that the gate leakage is dominated by the Fowler-Nordheim (FN) direct tunneling process through the III-nitride barrier. The novel contribution of the present analysis is that it postulates that in absence of absolute uniformity, FN tunneling takes place through only a small portion of the surface of the barrier, which boasts the highest electric field or the smallest Schottky barrier height. By applying this hypothesis, the origin of the inconsistencies inherent to the previously presented models in selecting the value of the electron effective mass can be explained.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".