Hi, Ben Good question. I checked with the Power PC data sheets http://ieeexplore.ieee.org/iel3/3906/11336/00514354.pdf?arnumber=514354 and they do not specify how they attach their 90/10 balls to the package, but I suspect some type of high-temp alloy is used. I do not believe they reflow the balls directly to the package pads. But I never did know what they use to solder the balls to the package with. Let me know if you find out. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Gumpert, Ben Sent: Tuesday, June 24, 2008 12:42 PM To: [log in to unmask] Subject: [TN] SAC solder on Pb90Sn10 Technetters, Does anyone have any experience (or heard of) using SAC solder to attach high-temp (Pb90Sn10) solder balls to a ceramic BGA? Ben --------------------------------------------------- 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 -----------------------------------------------------