Werner I am not sure where you are coming from. Steve referred to an immersion silver finish on the board. Given that we have giga millions of immersion silver solder joints and I have never seen or heard of a document case of silver embrittlement resulting from these joints. Is it your opinion that immersion silver can embrittle a solder joint? Best regards Lee ----- Original Message ----- From: "Werner Engelmaier" <[log in to unmask]> To: <[log in to unmask]> Sent: Thursday, May 24, 2007 2:38 PM Subject: Re: [TN] Silver Embrittlement? > Hi Steve, > You sure got your problems. > Yes, Ag-embrittlement is similar to, but actually worse than > Au-embrittlement, and for the same reasons. Of course, combining them is > giving you > AghhhAuhhh-embrittlement [or is it Auhhh Aghhh?]. > TSOPs, unless made with a Cu-leadframe are bad news; there CTE's are c'ose > to > ceramic because of the alloy-42 CTE (a magnet can tell you). ...and TSOPs > do > not deserve to be called 'leaded components.' > This compress a fractured SJ is used by a lot of people who's laptops are > conking out because of SJ-failures. > > Werner > > > > ************************************** > 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 -----------------------------------------------------