Electronics Forum | Mon Mar 29 11:20:04 EST 2004 | jdumont
Hi Dave, its not the connections that have the white residue. It is the surface of the board. The whole thing turns a milky white color. I have pictures if anyone would like to see them... Josh
Electronics Forum | Mon Mar 29 13:16:10 EST 2004 | russ
The only time I have ever had this happen was with un/not fully cured solder resist. Only shows up after wave. I believe that is because of the higher temp than reflow but don't know for sure. No help but what the hey Russ
Electronics Forum | Tue Mar 30 07:20:20 EST 2004 | davef
If you can rub it off, it's unlikely to be a solder mask problem. Try the "excess flux, flux contamination, solder contamination" angle.
Electronics Forum | Fri Apr 02 01:11:29 EST 2004 | Grant Petty
Hi, We have the spray fluxer, and I will have a look for the manifold. The guys thought they had purged the system but it's worth checking. Regards, Grant Blackmagic Design
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 | Mon Feb 08 09:14:37 EST 2010 | baildl632
davef: Thanks for the guidance! I am new to the sight and hope to gleen some usefull information for our line for better quality!
Electronics Forum | Mon Jul 17 12:36:32 EDT 2017 | aqueous
Aqueous Technologies (that's us) www.aqueoustech.com Austin American Technology www.aat-corp.com Technical Devices www.technicaldev.com Hope this helps! Mike konrad@aqueoustech.com
Electronics Forum | Fri May 11 14:19:14 EDT 2012 | cyber_wolf
Regarding nano coatings : Nano coatings are susceptible to wear during the printing process and cleaning processes. As they wear they flake off and can potentially contaminate your solder. There is not a lot of independent data available on this so k
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