Sheila, Intermetallics are not a problem with this system, but if you used the 95SnSb5 for the reason that you want a higher melting temperature 235-240 versus the 179 deg C melting temperature for the Sn62 you may be defeating the purpose as the melting point will be lowered and in localized areas will be about 180 deg. C. If you did not have a reason for using the Sn95Sb5 material to began with, why not use the Sn62 initially. I have not seen any improvement when cycling the Sn55Sn5 as compared to the Sn62; however, some literature indicates a better life at higher temperatures for The Sn95Sn5. I have seen it most used for sequential soldering, where you do not want to melt one joint while doing the other. Phil Hinton ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################