Your solution map
BGA head-in-pillow open joints
Check BLNKK's understanding of the problem, then review priority paths, candidate solutions and missing conditions.
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Your solution map
Check the problem definition, then choose which solutions to explore.
3 priority paths9 candidate solutions11 sources
BLNKK's current understanding
Please check the details- Structure / bonding interface
- Package-ball / board-paste interface
- Observation stage
- First electrical test after board reflow
- Phenomenon to localize
- Open with separated ball / paste despite apparent contact
- Engineering decision
- Separate contact-loss and wetting evidence to choose reflow-profile, oxidation-control, or coplanarity comparisons
- Sample evidence still required
- Are unreworked first-open locations and normal joints retained?
Paths to assess first
Paths serve different purposes and can be combined01
Interface localization and samplingConfirm nonfusion or cracks after joint formation
First02
Reflow-contact and printing-geometry controlsSeparate dynamic contact loss from placement / supply
First03
Surface-wetting and solder-paste controlsCompare oxidation / flux approaches under fixed geometry
FirstCurrent candidate solutions
Sample suitability still needs confirmationTemperature-dependent warpage / height-difference evaluationAkrometrix · Can help answer: Compare thermal geometry using public optical methods; contact loss still needs joint evidence.
→Solder-paste wetting and oxidation-control comparisonsIndium Corporation · Can help answer: Compare candidate pastes using public HiP mechanisms, with printing and placement fixed.
→First-reflow interface recheck requirementsBLNKK engineering review request (provider unconfirmed) · Can help answer: Use HiP / non-wet-open appearance differences to plan targeted interface confirmation.
→Next: confirm engineering conditionsUse 4 key conditions to adjust the assessment order, then choose solutions to compare.
Check engineering conditions →