Hi Don, We are struggling with the same issue. When we looked into this we discovered that for many years we were getting "lead-free" component leads but never called them that. I too would like to see a compatibility list of acceptable component lead finishes that can be used in a non-lead-free environment along with qualification testing. KennyB -----Original Message----- From: N Burtt [mailto:[log in to unmask]] Sent: Friday, January 05, 2007 1:23 AM To: [log in to unmask] Subject: Re: [TN] Qualification of ROHS Comonents with tin/lead Solder I'd be willing to place a small bet that despite all due diligence you have already unwittingly built some product using components with a tin/lead termination finish. Many suppliers flipped over to a lead-free finish before the industry woke up to RoHS and often didn't care to give us much notice of the fact. For most of us this didn't matter, but I'm glad those that should care about this do! Temperature should not be an issue as the parts without Sn/Pb coating will now be designed to survive Pb-free temperatures. The only area where you might be very concerned would be BGAs. The NPL in the UK did a good study of the reliability of mixed alloy solder joints, but concentrated mostly on varying levels of Pb contamination in Pb- free alloys, so this won't help you and whisker detection per se was not part of this project either. Nigel --------------------------------------------------- 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 -----------------------------------------------------