Electronics Forum | Tue Oct 14 17:45:20 EDT 2008 | gregoryyork
is that the milky emulsion one ???
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 | Wed Mar 24 16:28:06 EST 2004 | davef
No-clean flux residues can be either cleanable or not cleanable. The not cleanable type leave a milky white residue on the solder connection after suitable soaking in water. Your flux supplier will have suggestions on the appropriate flux.
Electronics Forum | Mon Nov 08 12:06:40 EST 2004 | davef
We are aware of no transparent laminates. Most are roughly translucent, with a milky white color. Some laminated are quite thin and could serve your purpose. As an alternative, could you etch foil [that's readily available] and the attach the etch
Electronics Forum | Mon May 26 08:59:32 EDT 2008 | davef
It's possible that the flux residues from the solder paste used in your SMT process is not compatible with your water wash process. For instance, some no-clean fluxes leave resudues that are not water washable. When these residues are washed, they de
Electronics Forum | Tue Feb 23 13:49:20 EST 2010 | davef
There should be no problem. Recognize that the residue of some low residue fluxes turn a milky-white color when you wash them. This could freak your quality people.
Electronics Forum | Thu Oct 01 12:46:57 EDT 2015 | gregoryyork
Would be nice to see your profile, as I would imagine you could be too cool in reflow especially if seeing milky residues in Paste could be Organics that havent volatised out properly
Electronics Forum | Wed Aug 04 16:09:48 EDT 2004 | Dreamsniper
Hi, Thanks for your reply. I run 2 boards, using the same paste, thermal profile and the same method of aqueous cleaning, 1st is a Topline test board with topline BGA (BGA 272 with 1.27 Pitch) and the 2nd is our product PCB with our BGA from Motoro
Electronics Forum | Wed Aug 04 16:46:40 EDT 2004 | davef
We assume this is different discussion that the discussion about "crystallized flux under BGA". Correct? Milky residue with water washing makes us think "noclean flux res that just got washed". We know what you said, but we can't help ourselves.
Electronics Forum | Sat May 18 07:36:31 EDT 2002 | davef
Copper teminations with no solderability protection on your LLP. Hmmm seems unusual, but it could be that the flux in your solder paste is not active enough to remove the corrosion on the Cu leads. OMG Microbond solder paste develops white residue
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