On May 21, 2010, at 8:52 AM, Stefan Salewski wrote: > Capillary forces should move the > fluid from width to narrow areas, so I do not really believe that all > solder will propagate from the contact area of your device into large > vias.
Solder is a bit odd: the temperature dependence of the capillary force moves solder from cooler places to hotter places. Try soldering with a torch: counterintuitively the torch *pulls* the solder toward it! So if you give the solder a place to flow that's hotter than the pad (which is in contact with the relatively cool device), it'll tend to flow there. John Doty Noqsi Aerospace, Ltd. http://www.noqsi.com/ j...@noqsi.com _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
