Hi Jim! Sorry, I haven't had my Diet Coke yet so both braincells aren't fully functional! There are a number of immersion silver chemistries available in the industry. I have experience with two - Enthone's Alphalevel and McDermid's Sterling. Both of these chemistries passed our internal qualification testing with the Sterling chemistry being rated slightly higher due to process consistency. We are gearing up to test AtoTech's immersion silver chemistry this year. Each chemistry suppler has a recommended finish thickness. There were a couple of very good papers at the IPC Fall meeting covering immersion silver finishes (authors - Toscano and Milad) - I would recommend reading those for additional insight. Dave "Marsico, James" <James.Marsico@DP To: [log in to unmask] .AIL.COM> cc: Sent by: TechNet Subject: Re: [TN] inmmersion silver <[log in to unmask]> 10/23/2003 08:20 AM Please respond to "TechNet E-Mail Forum."; Please respond to "Marsico, James" OK... but what's the recommended chemistry (or what choices are there) and what's the recommended thickness? Jim Marsico Senior Engineer Production Engineering EDO Electronics Systems Group [log in to unmask] <mailto:[log in to unmask]> 631-595-5879 -----Original Message----- From: [log in to unmask] [SMTP:[log in to unmask]] Sent: Thursday, October 23, 2003 9:17 AM To: [log in to unmask]; [log in to unmask] Cc: [log in to unmask] Subject: Re: [TN] inmmersion silver Hi Jim! The 4-14 Plating Processes subcommittee is currently working on specifications for immersion silver and immersion tin. ENIG was covered with the publication of the IPC-4552 specification. I would recommend you call out the specific immersion silver chemistry, a thickness range and a solderability requirement on your drawing note(s) until the 4-14 committee can complete their work. Good Luck. Dave "Marsico, James" <James.Marsico@DP To: [log in to unmask] .AIL.COM> cc: Sent by: TechNet Subject: [TN] inmmersion silver <[log in to unmask]> 10/23/2003 06:30 AM Please respond to "TechNet E-Mail Forum."; Please respond to "Marsico, James" Hello Technet: What's the best way to specify immersion silver finish on a PWB? In accordance with what? Thickness? Anything else? Jim Marsico Senior Engineer Production Engineering EDO Electronics Systems Group [log in to unmask] <mailto:[log in to unmask]> 631-595-5879 --------------------------------------------------- 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 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- 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 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- 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 847-509-9700 ext.5315 -----------------------------------------------------