EOTPR Fine Pitch Probing for Die-to-Die Interconnect Failure Analysis
Why this work is in the frame
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Bibliographic record
Abstract
Abstract Debug and physical failure analysis (PFA) of heterogeneously integrated semiconductor packages, particularly die-to-die (D2D) input/output (I/O) type fails, has become very challenging due to the lack of direct access to the I/Os from the package substrate to do static open/shorts fault isolation and limited test program granularity to determine which location along the D2D interconnect trace is failing. Thus, a suitable electrical fault isolation technique is required to ensure high success rate for root cause analysis. This paper discusses how EOTPR is used to isolate defects on a D2D interconnect trace of a chiplet advanced packaging using local silicon bridge with reasonable accuracy. Minimal sample preparation was needed to expose the I/O bumps for probing, thus minimizing the risk of artifacts that may cause the defect to be lost. A case study will demonstrate the successful application of the technique.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.003 | 0.003 |
| Bibliometrics | 0.006 | 0.009 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| 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 it