Temperature monitoring of narrow bandgap semiconductors
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Bibliographic record
Abstract
An integrated spectral pyrometry (ISP) technique particularly well suited to monitor the temperature of small bandgap semiconductors during molecular beam epitaxial growth is proposed. The technique relies on integrating the thermal radiation power emitted by the wafer over a spectral range where it is fully opaque, so as to avoid contribution from radiation transmitted from the substrate heater. In the present work, a 900–1700 nm array InGaAs spectrometer normally employed for band-edge thermometry was used. The temperature dependence of the integrated signal can be expressed by an Arrhenius-type exponential relation. The calibration procedure and the method employed to compensate for the background radiation from other hot objects in the reactor is discussed. The ISP performance is then demonstrated by monitoring the temperature during the growths of a Si doped InAs layer on InAs substrate and of an InSb/AlInSb quantum well structure on GaAs substrate. The ISP technique allows reproducible wafer temperature monitoring down to about 200 °C.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
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Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
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