Case 1333 ยท Public preview
Acceptable BGA Joints Can Conceal a Warpage-Fractured Die
A BGA device failed electrically, including degraded behavior during elevated-temperature operation, prompting concern about soldering and package warpage.
Diagonal BGA microsectioningSEMSolder-joint assessmentStandoff-height comparisonDie inspectionMolding-compound interface examination
What the evidence preview establishes
Package warpage most likely fractured the semiconductor die. The crack extended parallel to the die plane and coincided with local molding-compound delamination, while the examined solder joints remained acceptable.
Why this case matters
Do not stop after acceptable BGA solder joints are found. Continue through the package and die when electrical behavior remains unexplained; modest residual curvature can be evidence of a larger transient stress that fractured internal silicon.
Full evidence reserved for MEMBER and STOREThe complete case includes the evidence sequence, four interpreted figures, alternative explanations, limitations, and practical application guidance.