Electronics Forum | Fri Apr 02 06:26:13 EST 2004 | Phil James
Take a look at the downloadable paper on the subject of "White residues" available from NPL www.npl.co.uk/ei (Downloads) By the way, we also suffer from this problem!
Electronics Forum | Fri Apr 02 12:40:59 EST 2004 | Ron Herbert
White residue can often be caused by overheating the flux. When this occurs the flux is polymerized, basically turning it into an epoxy. You can usually determine if this is the problem by taking a pencil eraser to it. If it comes off, you have overh
Electronics Forum | Mon Apr 05 08:21:14 EDT 2004 | Grant Petty
Hi, Thanks for the tip, and I will check that out! We have some heavy BNC type connectors, so they need a bit of heat, and this could be right that we are then overheating the flux. Regards, Grant Blackmagic Design
Electronics Forum | Sun Aug 30 17:31:15 EDT 2020 | kylehunter
Hi all, (I posted on eevblog also, figured I'd try hear as well since this seems like a semi "niche" question) I need some advice on PCB cleaning. Up to this point, our assembly line has strictly run NC paste, with all SMT parts. We never washed an
Electronics Forum | Fri Jul 21 09:39:58 EDT 2017 | sumote
The very best batch cleaner I have ever used, and I don’t mean by a small margin, was an Electrovet MCS1000. I kept that machine running a very long time, but a software problem ended up being more than the company I worked for was willing to underta
Electronics Forum | Thu Jun 07 05:11:42 EDT 2012 | cp38260
Hi, I have pcbs (Duroid/RT 5880) with raw copper, soldered in vapour-phase chamber at 230 degrees Celsius. During soldering, copper gets tarnished. Cleaning with Vigon A250 removes the tarnished layer. Indeed, in the VigonA250 techn. datasheet it is
Electronics Forum | Thu Apr 01 03:22:59 EST 2004 | paul pmd
Deltawave flux pump continously runs while in run mode. After the pump there is a flux manifold distribution block. When switching between fluxes not all previous flux is purged or drained. When no clean is installed some cross contamination may occu
Electronics Forum | Mon Mar 29 07:21:51 EST 2004 | jdumont
We are also having the same problem here. I was told earlier that it could be a problem with the solder mask during the raw board manufacturing level but then I noticed that the problem was only surfacing on boards that went through the wave. As far
Electronics Forum | Tue Mar 30 02:58:55 EST 2004 | Grant Petty
Hi, Thanks for the ideas. With the solder mask curing problems, can you normally wipe off the white residue, as we can do this on our boards with our fingers. It's almost like the surface of the board has a "wet dried up" look to it, and it's a smok
Electronics Forum | Wed Dec 17 10:25:47 EST 2003 | blnorman
I may have asked this question before but couldn't find anything when I ran a search. Question, after ultrasonically cleaning our boards we bake them out to drive off residual moisture. Current requirement is 24 hours @ 105�C. I seem to remember a
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