Electronics Forum | Sat Jan 30 21:55:52 EST 1999 | Kallol Chakraborty
Does anyone have any reliability data /concern on pressfit rework/repair - is there any qualified /characterized equipment /tools present in the industry? What kind of effect does it have on barrel plating quality (1.5mil avg.) after 1 time rework or
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 | Wed Jan 17 20:33:19 EST 2001 | davef
The corner balls are supposed to collapse, but at roughly the same time as the other balls collapse. Also, those balls are located in the place that isthe easiest to get hot. Think about cranking-up the bottom heat, waiting, and slowing down the pr
Electronics Forum | Fri Feb 04 11:26:58 EST 2000 | Lisa Anderson
We are currently using an Air-Vac DRS24 hot air BGA/SMD rework unit. Most of our nozzles are designed to channel the exhaust away from nearby components. This and a minimum keepout of .100" has prevented any issues with secondary reflow of those co
Electronics Forum | Mon Aug 09 20:12:24 EDT 1999 | JohnW
Folk's, I'm looking for some helpful suggestions for reworking wave soldered bottomside components that have been glued. I'm not a fan of the twist and break approach and as some of them either have a double dot or a slot configuration this tend's t
Electronics Forum | Tue Jul 27 08:55:21 EDT 2004 | Cal
CJ- If I am not mistaken the Zephytronics machines have a money back guarantee if not satisfied. We have boards with huge ground planes and the air bath is the only rework that can do this. We also have found heat guns get hot enough but the heat is
Electronics Forum | Thu Sep 11 11:47:15 EDT 2008 | jeffcali
Depending on the assembly, I have applied balls on LGA's and reflowed them on using the rework hot air machine. Some places don't have the money to spend on mini micro stencils of all types, and thus spend the money on various sizes of solder balls
Electronics Forum | Thu Jan 05 10:56:49 EST 2012 | davef
The high thermal mass of metal core boards makes them difficult to heat with hot air convection heating or IR. So, edge heaters are used for effective heating of heavy core circuit boards. Hakko and VJ Electronix offer edge heaters. We imagine othe
Electronics Forum | Fri Apr 20 01:42:37 EDT 2012 | thmeier
If you extend the pads you get the effect that the solder below the component is pushed to the outside land which results in a very low standoff of the component, deteriorate the overall quality of the solder joint. Hot air (pencil or some of the sem
Electronics Forum | Fri Jan 30 06:14:01 EST 2015 | philc
And there is always the argument of "get in and out quick", which is possible with high tip temps. I prefer to use a really hot iron, and do it quickly, rather than a lower temps and keep the tipi on the bit till it melts the solder. If you have a P
