Eric, Our internal specification is 2 to 20 microinches. We've tested IAg successfully to 45 microinches. We routinely get boards with 22 to 26 microinches and use them rather than reject them. We really don't have a desired thickness within our 2 to 20 range but if we did it would probably be at the low end (2 to 4) because we don't use IAg as a solderable surface finish; we use the color change from copper color to silver color as an indication that the copper the IAg was plated to is clean and should be solderable. Regards, George George M. Wenger (908)-546-4531 Reliability / FMA Engineer Base Station and Subsystems Group Andrew Corporation, 40 Technology Drive, Warren, NJ 07059 [log in to unmask] -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Eric Kalgren Sent: Wednesday, November 17, 2004 8:21 AM To: [log in to unmask] Subject: Re: [TN] Electrodeposited Silver vs. Immersion Silver First of all, thanks to everyone for the excellent responses. Thanks to you guys, I have almost enough information to convince the design engineers to change the drawing. The only other information I need is the spec(s) that board builders use to control the immersion silver process. Anyone out there have any that they can share? I know that IPC has IPC-4553 pending release, but are there any others out there? Thanks! Eric Kalgren Manufacturing Engineer Atlantic Microwave Phone: 978-779-7062 Fax: 978-779-0101 -----Original Message----- From: Werner Engelmaier [mailto:[log in to unmask]] Sent: Friday, November 12, 2004 3:28 PM To: [log in to unmask] Subject: Re: [TN] Electrodeposited Silver vs. Immersion Silver Hi Eric, You may not want that much Ag anyway--you've heard of gold-embrittlement. Well, silver-embrittlement is actually worse--so beware. Regards, Werner Engelmaier Engelmaier Associates, L.C. Electronic Packaging, Interconnection and Reliability Consulting 7 Jasmine Run Ormond Beach, FL 32174 USA Phone: 386-437-8747, Fax: 386-437-8737, Cell: 386-316-5904 E-mail: [log in to unmask], Website: www.engelmaier.com --------------------------------------------------- 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. 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 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 -----------------------------------------------------