Electronics Forum | Fri Jul 08 09:14:49 EDT 2005 | Jason Fullerton
I've tested boards with SN100C HAL finish, and wetting to the PCB finish was poor at best, using a no clean SAC305 paste.
Electronics Forum | Fri Nov 15 11:03:48 EST 2019 | rgduval
I think Steve is on to it. The wire is not getting hot enough to wet. Either the solderer is attempting to solder too quickly, or the PTH is connected to a ground plane. The solder sticking up through the hole leads me to think it's connected to a
Electronics Forum | Thu Sep 08 08:54:09 EDT 2005 | Slaine
if the problem is wetting change the flux type. have you tried adjusting the temperature of the wave? if your getting 100% wetting id decrease the wave temperature, or try a flux that is less active.
Electronics Forum | Fri Apr 04 01:39:21 EDT 2008 | slthomas
All of what Dave says is spot on. I suspect that the most likely corresponding defects on your assemblies would be poor wetting and insufficient solder.
Electronics Forum | Mon Sep 23 22:31:48 EDT 2002 | davef
Comments are: * It�s interesting, but not surprising that your time above liquidous varies around the sides of this component. * You are correct in thinking that it is better to reduce than to increase the temperature differences around the component
Electronics Forum | Mon Jul 14 09:41:35 EDT 2008 | davef
Q1. Do we really need to follow the IPC J-STD-001 Solder purity? A1. Yes, you should control impurities in solder. Further information: * "Allowable concentration of contaminating elements in solder: impurities are harmless unless their level goes to
Electronics Forum | Thu Jul 03 07:43:50 EDT 2003 | davef
So, there is a crack or gap between: * Solder and component termination. * Component termination and component body. Correct? Describe: * Coarseness / smoothness of the metal on the termination underneither the crack. * Solder left on the terminatio
Electronics Forum | Tue Feb 19 15:59:55 EST 2002 | pjc
Surface tension is a likely cause. Surface tension is a negative wetting force. You may have a solderability problem. Be sure your flux is properly activated according to the flux mfg. top side board temp. specification. When surfaces to be soldered,
Electronics Forum | Mon Feb 28 12:50:20 EST 2005 | russ
If you don't have Plated through holes you will not get any hole fill! There is nothing for the solder to wet to. Problem solved? Russ
Electronics Forum | Fri Jul 04 09:10:53 EDT 2003 | davef
With poorly cured mask: * Wave soldering: Expect to see thin wavy band of dross imbedded in the mask in the wave solder side. * Reflow soldering: Expect to see a pinto board where the two tones of mask are [1] normal color and [2] a lighter color, al
