Pitted / Stretched Appearance on Fine Pitch Components.| 27 July, 2004
We have recently encountered a problem that we haven't seen before: The solder joint appears to be wetting ok and the solder is re-flowing but the appearance of the solder after re-flow is pitted. Using Kester 531, humidity around 41% temperature around 75 deg. Any ideas as to what might be causing this? Re-flow temp is 260 c.