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What is the rootcause for BGA Lifted after reflow

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MCR

#54804

What is the rootcause for BGA Lifted after reflow | 20 May, 2008

Hi, Im qulifiying 2 PCB supplier and supplier A has no defect found but supplier B got 4 defective cards and 4 are same failure. 4 cards having lifted pad after reflow in same BGa location. I run the 2 PCb supplier in one reflow,using same profile,same qty and run on thesame shift.Now, how can I prove that this might be a PCb issue? Thanks...

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