Hello Ken, We build hi-rel boards and many of our customers require that we have the parts with pure tin finished leads/solder terminations refinished with a Sn-Pb solder such as Sn63Pb37. It is a contractual requirement many times so we just do it as they say. So, in many ways it is pretty straightforward for us. We use a proven company called Corfin Industries who specialize in this process. The cost is not cheap, however. Piece part cost may run around $2 -$5 / part depending on geometry.... Best Regards, - Joe -----Original Message----- From: Bloomquist, Ken [mailto:[log in to unmask]] Sent: Wednesday, January 24, 2007 10:25 AM To: [log in to unmask] Subject: [TN] Lead-Finish Question Here's a question for all the high rel people out there. We've received a couple of notifications from major component suppliers that they will no longer supply the parts we need with a SnPb finish. Instead they are only supplying them with "Matt (Matte) Tin" finish. They do not talk about any under plating which would be desirable for minimizing tin whiskers. How are you people who build for DOD and medical handling these situations? Am I being too sensitive about Matt Tim? By the way these are single source and SMT parts. Thanks in advance, KennyB --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 1.8e 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 -----------------------------------------------------