Investigation into Void Evaluation, Reliability Impact, and Establishment Criteria for Various Bottom Termination Component Packages
Bibliographic record
Abstract
ABSTRACT Electronics component packages have changed dramatically over the last 20 years in the drive for smaller, more capable electronics products. While much of that development was evolutionary, with similar packages offered in smaller formats, manufacturers have more recently created a multitude of unique package styles, particularly in the group of Bottom Termination Components. Industry documentation has struggled to keep up with the development of the component manufacturers, so it is often left to the assembler to decide how best to install these package styles, including what criteria to establish for assembly and soldering acceptance. Changes in solder alloys and component finishes have increased voiding in general, and these new packages present challenges to the electronics assembler to ensure low voiding and robust solder connections that also provide an adequate thermal path. This paper investigates the challenges of assembly and solder joint evaluation and studies the impact of solder joint coverage (representative voiding) on solder joint reliability in thermal cycling for several bottom termination component (BTC) packages.
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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 | 0.002 | 0.006 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| 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".