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Surface Mount Technology Association (SMTA) | https://www.smta.org/knowledge/journal.cfm
., Nathan Blattau, Joelle Arnold, Thomas Johnston, Stephani Gulbrandsen, Julie Silk, Alex Chiu, and Yew-Hoong Chan Abstract 26-4 Is a High Phosphorus Content in the Nickel Layer A Root Cause for Black Pad on ENIG Finishes? Dipl.-Ing. Mustafa Özkök, Joe
Heller Industries Inc. | https://hellerindustries.com/wp-content/uploads/2018/07/last-will-of-bga-void.pdf
] Investigation Specifics: Variety of BGAs and CSPs, daisy chained, various solder ball diameters SnPb and SAC solder pastes Test vehicle one: 2.36mm thick (93 mil), FR-4, 6 internal planes
Heller Industries Inc. | https://hellerindustries.com/wp-content/uploads/2022/04/last-will-of-bga-void-1.pdf
] Investigation Specifics: Variety of BGAs and CSPs, daisy chained, various solder ball diameters SnPb and SAC solder pastes Test vehicle one: 2.36mm thick (93 mil), FR-4, 6 internal planes
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