Like a Swiss Watch???? Kerry McMullen Principal New Product Mfg. Engineer LTX Corporation 825 University Avenue Norwood, MA 02062-2643 (T) 781-467-5468 (C) 508-631-1832 (F) 781-461-0993 Joe Fjelstad <[log in to unmask]> Sent by: TechNet <[log in to unmask]> 04/19/2007 02:19 PM Please respond to TechNet E-Mail Forum <[log in to unmask]>; Please respond to [log in to unmask] To [log in to unmask] cc Subject [TN] Fragility of Pb-free Solder Joints This just came in my email from SMT Net. I have not been able to link to the article yet but the title and first paragraph sounds familiar. Joe _Fragility of Pb-free Solder Joints_ (http://www.smtnet.com/adsystem/redir.cfm?adid=831) _Universal Instruments_ ( http://www.smtnet.com/company/index.cfm?fuseaction=view_company&company_id=46383 ) Credit/Source: Peter Borgesen, Surface Mount Laboratory, Universal Instruments; and Donald W. Henderson, IBM Corporation Recent investigations have revealed that Pb-free solder joints may be fragile, prone to premature interfacial failure particularly under shock loading, as initially formed or tend to become so under moderate thermal aging. Depending on the solder pad surface finish, different mechanisms are clearly involved, but none of the commonly used surface finishes appear to be consistently immune to embrittlement processes. This is of obvious concern for products facing relatively high operating temperatures for protracted times and/or mechanical shock or strong vibrations in service... ************************************** See what's free at http://www.aol.com. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------