The only way to know for sure is to get samples and try i Steve, The only way to know for sure is to get samples and try it. It has as good a chance of working as ENIG. Did your customer give you any indication of why they wanted you to switch from ENIG to IAg? Regards, George George M. Wenger Senior Principle FMA / Reliability Engineer Wireless network Solutions Andrew Corporation, 40 Technology Drive, Warren, NJ 07059 (908) 546-4531 [log in to unmask] -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Kelly Sent: Tuesday, April 17, 2007 8:58 AM To: [log in to unmask] Subject: [TN] Immersion Silver Good Day To All, One of our customers has asked us to look at changing the finish on a flex circuit we manufacture from ENIG to Immersion Silver. The circuit is complex and requires that we laminate on metal stiffeners after the immersion silver. This would require a full cure cycle of approx. 375F for 1.25 hours under pressure. The circuit would then have to undergo an approx. 6 hour bake before assembly. Assembly requires 2 reflows. My question is will the silver still solder. This is a Class 3 product and we are loading BGA's. Thanks in advance. Steve Kelly Steve Kelly PFC Flexible Circuits Limited PH: (416) 750-8433 Fax: (416) 750-0016 Cell: (416) 577-8433 --------------------------------------------------- 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 ----------------------------------------------------- ------------------------------------------------------------------------------------------------ This message is for the designated recipient only and may contain privileged, proprietary, or otherwise private information. If you have received it in error, please notify the sender immediately and delete the original. Any unauthorized use of this email is prohibited. ------------------------------------------------------------------------------------------------ [mf2] --------------------------------------------------- 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 -----------------------------------------------------