In a message dated 1/18/06 15:34:23, [log in to unmask] writes: > But, depending on the silver and tin content, you get different > intermetallic structures for the same reflow profile, which can have an effect on > reliability during thermal cycling? > Hi Amol, That is theoretically true. Practically, iAg is self-limiting and thus the Ag content will not be high enough to form sufficient SnAg-IMC to cause Ag-embrittlement...and any difference in Sn % is part of the noise. Werner --------------------------------------------------- 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 -----------------------------------------------------