Electronics Forum | Thu Oct 14 08:05:17 EDT 1999 | JohnW
Dream, Sound's to me like your PCB supplier has process problems, probably outgassing or such from trapped moisture / contaminant's. I thoink it's time you called in your vendor for a chat. JohnW
Electronics Forum | Fri May 15 07:09:27 EDT 1998 | Brian K Heston
List, Is there any special disposal protocol needed when the filters on the PC board washer becomes clogged? How often do these filters become clogged? These filters would trap lead and such so how much does it cost to get rid of the filters? Bria
Electronics Forum | Wed Aug 22 17:29:29 EDT 2001 | Michael
We've found beading is not neccesarily the amount of paste but where it's applied. Trapping paste under components seems to be the culprit. On components where we couldn't reduce aperature size we simply moved it outward actually overprinting the p
Electronics Forum | Mon Jul 21 21:59:08 EDT 2003 | davef
Theory #6 [maybe 3a?]: If you change your paste to a 'non-voiding' paste, your problem will go away. It's the flux in your paste that's killing you. The flux gets trapped in the solder and then releases ejacta that form the volcanic openings in you
Electronics Forum | Mon May 24 16:34:03 EDT 2004 | Mark
I just got a report from MacDermid on Solder Mask Interface Attack Issue (SMIA) with Sterling Silver Process. Corrosive chemicals in the ImAg process get trapped under the soldermask edge and eat at the copper trace. They are experimenting with diffe
Electronics Forum | Thu Dec 08 18:59:04 EST 2005 | KEN
Is this a wire dip tinning process? If yes, then your flux is probably trapped under the insulator, causing corrosion. BAD BAD BAD (hopefully you don't make wire harnesses for air planes or passenger trains). More info please.
Electronics Forum | Tue May 09 20:58:36 EDT 2006 | CW
It does specify when to clean. But when we open it up, there's not much flux in the containment. The containment doesnt seem to trap the flux. infact, we hv more flux in the duct than the containment. anyway, we will talk to MFGR to get their rec
Electronics Forum | Wed Aug 02 21:36:14 EDT 2006 | Chunks
It depends on the water quality of your final rinse too. Too dirty and pools of water will trap residues on your board. If let to evaporate, these residues can stay on your board.
Electronics Forum | Thu Feb 15 12:32:14 EST 2007 | Eric D
one of my customer areworried about the flux risidue in the blind vias, or if the plug the vias and there is air trapped the plug will blow during our process. Appreciate for your response
Electronics Forum | Thu Feb 15 13:49:10 EST 2007 | russ
only plug one side, you can definitely blow out during reflow process with a sealed via/ it is impossible for flux to be trapped in a blind via. Russ
