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 Jul 01 13:17:39 EDT 2015 | davef
Cheryl Tulkoff and Randy Schueller do a good job summarizing the thinks on pad cratering here: http://www.smta.org/chapters/files/uppermidwest_padcratering.pdf Potential Mitigations to Pad Cratering * Board Redesign * Solder mask defined vs. non-s
Electronics Forum | Wed Feb 28 15:09:57 EST 2007 | Hussman
Some no-cleans will pool flux on the top of the solder joint which acts like an insulator. I normally do not paste "contact" pads. You can have your board house HASL them if you need the extra bump on the pad.
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 | Wed Feb 28 14:25:33 EST 2007 | Bill
We have a board that uses a solder pad for one of the contacts of a button battery and had no problems when we were washing the boards. We are now using a no-clean flux and find that on a bunch of boards there is a coating of flux covering the pad s
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
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