Hi Doreen, What you likely have are not "rubber" solder joints, but no solder joints at all. That is, no metallurgical bond ever existed for these joints. If you take these joints apart, you are likely to find that there is no sign of tin on the lead surfaces that were surrounded by the solder. This can happen when the leads are not solderable for whatever reason (there is Alloy 42 presumably from a mill in South Korea that is not solderable), but are covered with a thin flash of solderable metal (Au, Ag, Cu, Pd) that promotes the coverage of these leads with solder. Of course, this kind of "sliding" of the lead foot out of the surrounding solder joint "sock" can only happen with gullwing leads. Werner Engelmaier Engelmaier Associates, Inc. Electronic Packaging, Interconnection and Reliability Consulting 23 Gunther Street Mendham, NJ 07945 USA Phone & Fax: 201-543-2747 E-mail: [log in to unmask] *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * 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] * ***************************************************************************