Hi TechNet! Are the solder skips location dependent or always near specific types of other components on the assembly? You may be getting shadowing ( an alteration of the solder wave flow) of your components from other components or structures on the assembly. You could also try checking your nitrogen environment - a "cleaner" nitrogen blanket (i.e. less oxygen ppm levels) will lower the solder surface tension and allow for additional wetting. Note - really low surface tension can give you defects too! Dave Hillman Rockwell Collins [log in to unmask] ______________________________ Reply Separator _________________________________ Subject: Assy: Solder Skip Author: [log in to unmask] at ccmgw1 Date: 1/16/97 9:59 AM Hi Technetters, I am wandering anyone could suggest ways to get rid of solder skips. We have a lot of solder skip on the Tant capacitor, case size type A and B, but don't have any problem with the rest of the chip components and SOICs. The pad size for the Tant Cap id pretty small, only allow very little for space for the chip wave to be able to solder to the terminations. Any ideas how to fix it..We are running no-clean using a full-blow nitrogen tunnel wave-solder machine. *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * *************************************************************************** *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************