Electronics Forum | Fri Apr 18 15:38:22 EDT 2008 | ck_the_flip
Do you have a picture? SMTNet HAS the technology now to post pictures. "Disturbed" to the typical Q.E. usually means grainy or dull, or a wrinkly solder appearance. All of this has to do with the "grain structure" of the solder joint. Here's a p
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 | Thu Sep 20 01:13:05 EDT 2001 | Michael Konrad
Hi Dave, It may be. DI water alone will not build up residue. It can attack the finish of electro-polished (mirrored) stainless steel though. I have seen a white / chalky buildup on poly inline cleaners, usually isolated in the wash section. The
Electronics Forum | Mon Apr 29 04:57:28 EDT 2002 | madreindeer
Hi, That is very common in WS pastes.It is white residue (Salt) Usually it�s not dangerous it only looking bad. I think best way would be contact your paste supplier and they should know what would take a stain off if not, change supplier. There i
Electronics Forum | Mon Apr 29 09:54:46 EDT 2002 | davef
MadReindeer If this white residue is salt, * Why do you say is the presence of it 'not dangerous it only looking bad'? Don't salts sometimes go into solution with moisture on the board from humidity in the air and form cathodic plating shorts betw
Electronics Forum | Wed Nov 09 12:50:25 EST 2011 | dyoungquist
I've never run D.I. water through an ultrasonic humidifier before. I think the reverse osmosis (RO) process removes more stuff (minerals and etc.) than the D.I. process does. My experience from using one in a home setting still tells me that is the
Electronics Forum | Mon Feb 27 11:32:57 EST 2006 | Rob
If you are going for high margin business then you may want to ditch the blue smurf coats & go for white - they are a bugger to keep clean but look like you have a dedicated team of scientists. (Giving people clipboards & safey glasses helps complet
Electronics Forum | Wed Aug 07 16:16:49 EDT 2013 | simplycomplex85
The pictures show you what I'm seeing and the settings. There aren't flat metal surfaces. There is a lead and a fillet there. So its shown as black, not white. We are using the red and the histogram.
Electronics Forum | Wed Dec 02 20:41:13 EST 2015 | slouis2014
Thanks for the link. Their is a white silkscreen underneath the BGA instead of a green soldermask. Attached is a picture of the BGA. Does these affect the solderability for the component.
Electronics Forum | Fri Dec 10 08:44:52 EST 1999 | Dave F
Vinesh: You�ll find no papers that "clearly describes the harmful effects" of your style "of white residues," because no one is crazy enough to brag that they are doing what your customer wants you to do. The residue of no-clean fluxes are designe
