Bimetallic Thin Film Grayscale Photomasks for Complex 3D Microstructure Creation in SU-8
Bibliographic record
Abstract
Metallic thin films can be fully oxidized by focused laser beams, resulting in their optical density (OD) changing from highly absorbing to very transparent. Previous research found the laser-induced partial oxidation process allows the creation of grayscale photomasks. This work investigates Sn/Zn, Zn/Al and In/Zn thin films, which are DC/RF-sputter deposited and then scanned by an argon ion CW laser. The resulting transmittance for the mask varies from 0.06% (3.2 OD) to 63% (0.2 OD), offering a greater range of transparency at I-line (365 nm) than existing commercial grayscale masks such as chrome halftone binary and analog HEBS photomasks. Having 8-bit gray level precision, bimetallic films are capable of producing complex 3D microstructures using only a single exposure. Using SU-8, a thick negative photoresist, along with standard photolithography, microfeatures with height variations up to 100 mum were successfully generated.
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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".