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Electronics Forum | Sat Oct 06 08:42:21 EDT 2001 | davef
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.
Electronics Forum | Sat Oct 06 05:33:47 EDT 2001 | spchua
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 g
Electronics Forum | Wed Aug 17 12:26:06 EDT 2011 | rdubya
Hey all need your input, this looks like classic black pad to me. what do you think?
Electronics Forum | Wed Aug 17 21:29:25 EDT 2011 | davef
If looks were the measure, we'd say, "Hail yes, it looks like black pad." The determination of black pad or not is best done in a laboratory.
Electronics Forum | Fri Aug 19 11:13:40 EDT 2011 | eezday
I'm still sold on the "black pad" model. The price of gold should be a good indicator of what is happening. The gold plating solution is being used well past its life and plating times are stretching. Extended time in the plating solutions is a lo
Electronics Forum | Thu Aug 18 12:10:40 EDT 2011 | rdubya
Do you happen to know of any good labs for this analysis?
Electronics Forum | Thu Aug 18 15:13:28 EDT 2011 | blnorman
STI is now at 261 Palmer Road Madison, AL (moved a couple of years ago).
Electronics Forum | Thu Aug 18 17:17:59 EDT 2011 | rdubya
Thank guys, appreciate the help.
Electronics Forum | Fri Aug 19 01:56:53 EDT 2011 | ppcbs
I've been seeing a lot of product come in with what appears to be black pad lately. I've sent stuff out to labs to be told there is no contamination. Contamination or not solder won't wet to it. Regardless of what it is we have a method to remove
