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
Electronics Forum | Wed Aug 01 12:23:21 EDT 2007 | stepheniii
Don't forget rework, post production eco's and other mods. Also if it's on a generic base, how do you spot slight misplacments? Board shops have some fallout, now the fallout with be with the assembly makers and with components trapped on the subst
Electronics Forum | Wed Dec 03 07:30:57 EST 2008 | realchunks
Hi System Steve, What is a solvent cleaner over water wash? Solvent first and then rinse with water? And why do they feel the need to bake the boards? Do they think trapped moisture will cause board damage?
Electronics Forum | Tue Mar 31 05:48:32 EDT 2009 | d0min0
depending on what is diameter of your balls ;) and smallest electrical distance on the boards (IC legs?? or other) solder balls trapped in ?? or not ?? base on that to see how dangerous your solderballs can be
Electronics Forum | Sat May 02 08:48:32 EDT 2009 | davef
You have a board defect. Any moisture and/or organic contaminants trapped by the solder resist during lamination may cause solder mask delamination, blistering and/or adhesion loss during subsequent soldering operations or during extended use.
Electronics Forum | Thu Mar 25 12:34:26 EDT 2010 | bgaguy
the voids will cause a long term relability problem as the part will not be correctly heatsinked. Change your stencil aperature to a "+" sign 15-20 mils wide in the center of the pad. ___________ : | : : | : :----|----: : | : :__
Electronics Forum | Tue Sep 07 12:57:00 EDT 2010 | jrr3434
Thanks for the info mike. How well do these batch cleaners work with densely populated through hole boards that were solder with no clean flux? Is there a problem with water getting trapped under large capacitors? I'm using kester 959t for flux on b
Electronics Forum | Wed Sep 29 09:29:47 EDT 2010 | swag
Take a few parts from the reel and look close at the parts to make sure the bottom surface of the leads is below the bottom surface of the body.
Electronics Forum | Fri Jan 21 11:00:56 EST 2011 | xps
Hi, in my experience, the humidity is trapped in the solder paste. Otherwise you can also try to : adjust preheat profile, and /or increase paste viscosity, and /or increase paste metal content (they are the most common causes).
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