Electronics Forum | Mon Dec 26 19:18:49 EST 2005 | arnold
I would to ask on what do you call on the color green contamination found on the soldered units. Whe i soldered some units after few days there was a color green on the wires. what do you call on this contamination?
Electronics Forum | Thu Aug 30 06:57:56 EDT 2007 | simonalden
Hi we are currently experiencing a problem with solder contamination of the gold contact pads on our pcbs following the reflow process, possibly through sputtering. We have been advise that this can be caused due to the pcbs being humid or due to th
Electronics Forum | Thu Apr 13 21:02:37 EDT 2000 | Mario Carluccio
Can anyone advise me what are the types of contaminants which can be present on a printed circuit board at the very beginning of a SMT line. Of these contaminants, are any of them detrimental to the SMT process (i.e. label application, or solder pas
Electronics Forum | Tue Oct 06 07:37:01 EDT 2015 | m_imtiaz
can we use same reflow oven for lead free and leaded solder paste, is there any chance of lead contamination in lead-free products.
Electronics Forum | Thu Aug 30 07:46:07 EDT 2007 | davef
Search the fine SMTnet Archives to find threads like: http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=51367
Electronics Forum | Wed May 28 11:56:18 EDT 2003 | blnorman
Yes we are using "silicones", but to find this contaminant we were looking for "silicon" the element by SEM/EDS. We use Dow materials and my contact there is checking to see if they have any info.
Electronics Forum | Tue May 27 11:59:14 EDT 2003 | blnorman
Is anyone aware of any reports, studies, articles on the subject of silicon contamination in SnPb solder joints. We are evaluating repair of conformally coated (silicone) boards. The fear is that we will never totally remove the silicone and once i
Electronics Forum | Thu Sep 21 17:50:43 EDT 2000 | Bill Boles
Does anyone have a quick reminder for a PCB with immersion gold surface finnish going through a reflow profile: Which of the following statements is more correct? A: In order to minimize gold in the intermetallics of the solder joint, the board temp
Electronics Forum | Wed May 28 14:35:47 EDT 2003 | davef
Wow, you're very correct. I guess we use silicone to calibrate our machine, as follows: XPS spectral measurements of dimethyl silicone should include O(2s) at 25 eV, Si(2p) at 102 eV, Si(2s) at 153 eV, C(1s) at 285 eV, and O(1s) at 533 eV. The C(1s
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
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