Electronics Forum | Tue Mar 04 01:51:52 EST 2008 | lococost
An industry issue??? Sounds more like another ROHS issue to me. Experience tells us the LF flux leave much more residue inside the oven
Electronics Forum | Tue Apr 05 16:19:08 EDT 2022 | emeto
Datasheet says that post solder cleaning is required.I assume this will completely go away after cleaning. Water based water soluble fluxes often leave nasty residues.
Electronics Forum | Thu Apr 14 13:10:49 EDT 2005 | Shean Dalton
Hi John, A primary consideration is the type of flux you are using. If it's water soluble (organic acid) then cleaning is highly recommended. Any other flux that fails the copper mirror test, we'd strongly recommend cleaning. Passing the copper m
Electronics Forum | Sat May 31 09:44:56 EDT 2008 | gregoryyork
looks like the board has gone through and not actually fluxed properly,trying hand applying and it should fix it. IF it still occurs put the pallet through without pcb and without flux and see what residues come off in the wave. residues you are seei
Electronics Forum | Fri Sep 09 15:53:22 EDT 2005 | patrickbruneel
If the white residue is from a no-clean flux or no- clean solder flux core you can leave it on the board. (Consult with the flux or cored solder manufacturer) Because after being encapsulated with conformal coating the residue is sealed from humidity
Electronics Forum | Mon Aug 19 04:48:27 EDT 2002 | surachai
I'm not found this problem with adhesive but found in NC flux , Then you should get some residue and analyse it by SEM and EDX for specify the actual source ( flux or adhesive ? ) , if it 's from adhesive , sometime your supplier must join this pro
Electronics Forum | Fri Apr 04 10:02:20 EST 2003 | rdr
Do you reflow both sides of the boards before washing? Sometimes these white residues occur from "burnt" flux. we see this from time to time especially when using hot air and liquid flux. Russ
Electronics Forum | Fri Jan 08 18:28:04 EST 1999 | Bill Schreiber
When going to a "no clean" process, there are always two items that will require cleaning - stencils and pallets. You may also have a requirement to clean misprinted PCBs and possibly SMD adhesives. The Smart Sonic Stencil/Pallet Cleaning Process
Electronics Forum | Wed Apr 30 20:33:15 EDT 2003 | davef
Haaaa!!!! Yes, we�ve seen things like that. We found that a high input impedance amplifier worked fine in a room with a controlled environment and worked poorly in the sweat-shop portion of our plant. We were using good ol� WS609, straight water w
Electronics Forum | Tue Sep 14 18:27:37 EDT 2004 | MikeF
I would need a little more information to be able to rule out some of the possible causes. Have you checked to see if the pins with the minimal solder have anything in common, do all have traces to them? or internal power or ground plane connections?
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