Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


black and grey pad

spchua

#17796

black and grey pad | 6 October, 2001

I had recently encounter the "black and grey" pads problems for the BGA pad after the convection re-flow. The pads shows in in "black and grey" color and a litter solder in it, and it happen in ramdom, when applied heat and solder on the "black and grey" pad with solder iron the wetting so well, can someone provide me the advice.

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#17801

black and grey pad | 6 October, 2001

Please give us additional background on your board, solder, process, etc.

If you are talking about black pad in ENIG solderability preservative, check the fine SMTnet archives to get started.

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