Hi Ioan, You may need to put that out to a wider audience - leadfree on IPC? The science behind the SN100C is spot on and faced with a choice between it and SAC 305 I would choose it because of the reduction in copper scavenging which by the way is very real. You need to get an input from Werner on this. John Burke (408) 515 4992 -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Tempea, Ioan Sent: Monday, April 30, 2007 11:42 AM To: [log in to unmask] Subject: [TN] SN100C vs. SAC305 Dear Technos, I need to know how is this combat evolving. This topic has been brought up several times, but things change fast right now and there must be more empirical data on the matter. What I know regarding the 2 materials can be summarized: * Pro SN100C: cheaper, better looking, eats less copper in the TH * One major unknown - the Reliability: SN100C is not available in solder paste format, therefore the boards would have SAC SMT joints and SN100C TH joints. This means 2 different materials and since we don't know how reliable a board with only one material is, should we risk introducing an extra variable? I would like to know what your take is. Does anybody mixes the 2 materials? Any reliability testing done? How long have you been doing it and do you see RMAs? Thanks, Ioan --------------------------------------------------- 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 -----------------------------------------------------