Electronics Forum | Thu Nov 07 15:33:02 EST 2013 | mleber
Below are a few photos of an ongoing issue we are having with 1 pwb style. Some of the pads appear to have contamination that appears after the selective solder step. The joints are extremely hard to rework - almost impossible. We had the joints anal
Electronics Forum | Mon Aug 13 10:39:35 EDT 2007 | dphilbrick
If you can not find the source of cotamination then apply masking to fingers until you do find source, single layer of Kapton tape or similar should not affect print thichness. This will eliminate scrap / rework in the mean time.
Electronics Forum | Tue May 27 12:40:50 EDT 2003 | davef
Hi Bill You said, "silicon". We assume by your discussion that you ment to say, "silicone". For background on silicone and soldering, check with Dow Corning [517-496-6000]. They make a OS2 [VOC-free] silicone stripper and should be able to give y
Electronics Forum | Thu Sep 19 21:17:50 EDT 2002 | Sam
We had encountered similar problem before. But the cause was found out to be the poor good plating, instead of contamination. The way we dealt with that was sending them to the supplier for rework. It may be the fastest and most relaibility way. Goo
Electronics Forum | Fri May 21 15:36:05 EDT 2010 | ccross
That is exactly the type of problem we are having. Some work, some dont. We feel these parts are not counterfeit so to speak but reworked, removed from other boards, cleaned up to some degree - hence the flux residue, black contamination, scrapes, wr
Electronics Forum | Fri Feb 05 14:29:14 EST 2010 | kaz
the board in question is from Foba Laser Engraver, it's a surface contamination coming from.. everywhere, a lot of moving parts that are lubricated. I'm now studding chemicals that we may use for our kind of rework & cleaning. We may think of modifyi
Electronics Forum | Wed Sep 12 20:46:16 EDT 2007 | Mag10
We've configured SMT and Wave lines such that each line can run either No-Clean and Water soluble process. As we are doing cleanliness study, an observation is there may be cross contamination when we share the Rework benches or PCB trays between No-
Electronics Forum | Mon May 23 23:21:18 EDT 2005 | magkel
HI guys, I am new to this forum, Earlier author is asking regarding of Lead free rework. 63-37 is non lead free and this will contaminate the product itself. I do not know what are the components that you are facing to rework with. But try to set th
Electronics Forum | Tue Oct 31 22:09:25 EST 2006 | davef
The is a serious concern of lead contamination of leadfree solder connections. For background, search the fine SMTnet Archives. For instance: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=30307
Electronics Forum | Tue Nov 29 11:09:59 EST 2011 | Shean Dalton
Siaomuay, What is your flux and peak reflow/rework temperature? Do you use chemistry in your cleaner? Regards, Shean Dalton
