MOCVD-grown 175 GHz InP-GaAs/sub x/Sb/sub 1-x/-InP DHBTs with high current gains using strained and heavily C-doped base layers
Bibliographic record
Abstract
Summary form only given. In this paper, we report high current gain InP-GaAsSb-InP DHBTs implemented with a 200 /spl Aring/ thick strained GaAs/sub 0.6/Sb/sub 0.4/ highly-doped base layer (C: 8/spl times/10/sup 19/ cm/sup -3/). The devices exhibit peak cut-off frequencies f/sub T/= 175 GHz and f/sub max/=106 GHz with a BV/sub CEO/=6 V and a DC current gain /spl beta/=200-300 which can be traded off for higher f/sub max/ values. The devices behave extremely well even at low supply voltages: f/sub T/ remains above 150 GHz (125 GHz) for V/sub CE+/=0.75 V (0.55 V). This work is the first demonstration of a sub-picosecond transit time for an HBT with a base material other than GaInAs or GaAs, and we attribute the tenfold increase in /spl beta/ with respect to our previous work (Bolognesi et al, 1999) on the use of a strained As-rich base layer.
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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) | 0.002 | 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".