Electronics Forum | Mon Sep 30 09:00:26 EDT 2002 | arcandspark
Russ, I have been reworking BGA's for over five years now and have never been able to remove voids in the solder balls without removing the BGA itself. Your thermal profile can also cause the voids along with a poor solder paste. I have experimented
Electronics Forum | Tue Nov 04 16:32:22 EST 2003 | Marc
Marc, I agree with Dennis. Your best method is to apply solder mask over the pads, then install the BGA. You can also remove the balls or completely remove the pads, but it take a skill person to do it. We do all that type precise rework in Southern
Electronics Forum | Thu Oct 17 12:01:09 EDT 2013 | pavel_murtishev
Gentlemen, Have no idea how to remove fully polymerized silicone elastomer resides from a particular product. Product housing has not been designed for filling. Having polymerized, elastomer (DowCorning SylGard 160)expands and gets out of filling ho
Electronics Forum | Wed Oct 29 22:41:42 EST 2003 | msimkin
Our design team have got a problem. We need to either drill out 6 vias/pads for a BGA site, or remove the solder balls form the BGA before they are palced. ( std eutectic) Has anyone used a vendor to remove balls from BGA (0.75mm piutch, ball size ap
Electronics Forum | Wed Oct 29 23:40:29 EST 2003 | ppcbs
We here at Precision PCB Services, Inc. Perform selective ball removal. We just completed a job today where we removed 4 balls, and then installed traces to dog-bone the pads at two locations on 30 BGA's. An eaisier and more cost effective solutio
Electronics Forum | Fri Jul 23 08:58:11 EDT 2004 | RDC
I know Micro Care made a unit that removed conformal coating with compressed air and a solvent. But they no longer make it. Does anyone have the 2000 version of this unit and may want to sell it or know of another compressed air solvent solution, p
Electronics Forum | Wed Jan 19 14:32:37 EST 2005 | esoderberg
Short of buying a closed look wash system, what other machines/processes are available for localized removal of flux that is not operator intensive. already familiar with Branson ultrasonics and just washing in alcohol but what else is out there?
Electronics Forum | Thu Oct 17 13:24:37 EDT 2013 | leemeyer
Look into Dicone NC9. We used this years ago to remove silicone from some printed circuit cards. As I recall it did not have any adverse effects on the pcb.
Electronics Forum | Thu Feb 26 10:33:01 EST 2015 | emeto
Take a look at articles that explain underfill process and how to remove/rework underfill: http://www.finetechusa.com/rework/applications/underfill-rework.html http://www.circuitnet.com/experts/86535.shtml
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