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 | 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 | Wed Mar 19 09:59:45 EST 2003 | davef
Jodi What's your thinking on the black pad rework technique proposed in: �A Failure Analysis And Rework Method �� Z. Mei, et al, SMTA International 1999, p407
Electronics Forum | Wed Mar 19 19:02:39 EST 2003 | Jodi Roepsch
From my experience, we have had little success in reworking boards with the black pad condition. In one instance, with several reworks, we were able to get plated through holes with the defect to take solder but the joint reliability was highly ques
Electronics Forum | Thu Mar 20 09:50:42 EST 2003 | Jodi Roepsch
We have not found a way to rework boards successfully at this time. Boards with severe black pad get scrapped.
Electronics Forum | Thu Mar 20 14:11:45 EST 2003 | MA/NY DDave
Hi Guys, There are techniques to do rework that involve molecular surgery even when selective, ablation and piles of localized techniques exist yet the cost is far too high and scrapping is mostly a best cost manufacturing alternative. At the cost o
Electronics Forum | Mon Jul 20 08:23:16 EDT 2020 | jsmuriel
Do you think IPC able to help you to save cost for you company thru rework / repair and modification course? - Is there any ROI from the course attended such as 7711/21? - Does your company get more business or credit via IPC certification? - Does th
Electronics Forum | Mon Jul 20 09:10:20 EDT 2020 | spoiltforchoice
I'll be honest here, while training people to IPC standards is good. Zero% of our clients or future business inquiries ask about things like IPC610, even stipulating ISO is rare, as long as there are systems in place of some sort.
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.
