The best advice anyone can give you concerning the choice between IAu and IAg would be to do your homework and make an "informed decision". Do not believe everything you hear from someone who has a vested interest in selling you something (i.e., a company selling a particular surface finish). Talk to real users of surface finish, read all the published literature you can get your hands on, talk to your board fabricators and find out what surface finishes they have and why they prefer one over another and above all do a comparative evaluation and evaluate the surface finishes for your particular situation. There is lots of truth to the old quote "Once bitten twice shy". Those who have been bitten by an ENIG problem will have little positive to say about ENIG and the same is true for those who have been bitten by IAg. That doesn't by itself mean that IAg is a better surface finish than ENIG. However, I also think that there are more users in the industry that have been bitten by ENIG than there are who have been bitten by IAg. Another good source of knowledge is to talk to failure analysis laboratories to find out the kinds of surface finish problems they have been working on. Regards, George George M. Wenger, Andrew Corporation Reliability / FMA Engineer Base Station & Subsystems Group 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 Chad Renando Sent: Monday, August 14, 2006 5:55 PM To: [log in to unmask] Subject: Re: [TN] Immerison Au vs Immersion Ag I am hearing a lot of discussion about reliability and compatibility. From the sounds of it, it seems to be a wash. If that is the case, from a commodity perspective, I would think you would get a cheaper price for silver, so if shelf life is not an issue, why not go with that? Chad -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Dave Seymour Sent: Tuesday, 15 August 2006 3:33 AM To: [log in to unmask] Subject: [TN] Immerison Au vs Immersion Ag We are having a little talk about surface finish for RoHS compliance. We have been doing Immersion Gold for 10+ years and are starting to switch to Immersion Silver because some feel that Silver is a better finish for RoHS compliance. I can't find anything that says one can not be compliant with Immersion Gold and I'm trying to figure out why the surface finish should change at all. Could someone point to some articles, opinions or sources that might help resolve the issue? I'm out doing some web looking now. Thanks Dave -- Dave Seymour, CID+ Catapult Communications Inc. 800 Perimeter Park Dr, Suite A Morrisville, NC 27560 Direct: (919)653-4249 Main: (919)653-4180 Fax: (919)653-4297 [log in to unmask] --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 ----------------------------------------------------- ------------------------------------------------------------------------------------------------ This message is for the designated recipient only and may contain privileged, proprietary, or otherwise private information. 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