Characterization of the High Frequency Performance of 28-nm UTBB FDSOI MOSFETs as a Function of Backgate Bias
Bibliographic record
Abstract
This paper describes for the first time the high frequency performance characterization of a production 28-nm ultra-thin-body-and-BOX (UTBB) fully-depleted (FD) SOI CMOS technology. The measured gm, fT, and maximum available gain (MAG) of fully-wired n-channel and p-channel MOSFETs are reported as a function of gate-source, drainsource, back-gate voltages and drain current density. It is shown that the back-gate bias can reduce the VGSat which the peak gm, peak fTand peak MAG occur by up to 400 mV and can flatten the fT-VGScharacteristics, as needed in highly linear amplifiers. The peak gm/fTvalues of 1.5mS/μm/298GHz and 0.93mS/μm/194GHz, for n-MOSFETs and p-MOSFETs respectively, match or exceed those of 28-nm LP bulk and 45-nm SOI MOSFETs with identical layout geometry and metal stack wiring.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".