Hi,

Is there a good method to hand solder 0402 cap to hard gold plated pads (30-50 micro inches) and maintain reliability?
It is a design issue. Customer needs to install a BGA socket on top side. So they specify hard gold plate on BGA area.
But there are lots of caps on bottom side of the BGA and those pads are plated with hard gold too. No one wants to
scrap those fabs due to hot schedule and high cost. Please advise.

Thanks,
Wei Wang
Process Engineer
Sanmina-SCI

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