Wet Metallization of High Aspect Ratio TSV Using Electrografted Polymer Insulator to Suppress Residual Stress in Silicon
Bibliographic record
Abstract
Through-silicon-vias (TSV) are the key to 3-D integrated microsystems. Their fabrication leads to reliability issues linked to the thermo-mechanical stress induced in the silicon around the vias. In this paper, we propose reducing the silicon residual stress in high aspect ratio copper TSVs (HAR TSV) using an electrografted polymer insulator, poly-4-vinylpyridine (P4VP), to replace the traditional silicon oxide layer. We use Raman spectroscopy to make the first investigation of the residual stress in the Si around P4VP-insulated TSVs and compare it to SiO2-insulated TSVs. The results show that P4VP acts as a stress buffer layer because of its particular mechanical properties as the measured residual stress in Si is significantly reduced at room temperature around the polymer insulated HAR TSVs. The potential benefits of such a technology are not only better thermo-mechanical reliability of a 3-D integrated microsystem but also greater integration density.
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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".