Ozone passivation of slow transient current collapse in AlGaN∕GaN field-effect transistors: The role of threading dislocations and the passivation mechanism
Bibliographic record
Abstract
Current collapse in AlGaN∕GaN field-effect transistors subjected high rf drive levels and/or to bias stresses is attributed to the presence of surface trapping levels whose nature remains to be identified. Although current collapse manifestations can be alleviated with various surface films, the exact passivation mechanism remains a matter of debate. We show that slow transient current collapse can be eliminated by a short ozone exposure, unambiguously tying current collapse to the sample surface, without invoking strain or dielectric encapsulation arguments. We assert that the surface states responsible for slow collapse arise where dislocations intersect the sample surface, and propose an alternative current collapse mechanism wherein individual dislocation lines result in multiple discrete virtual gates that locally deplete the transistor channel access regions.
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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".