Eric You may want to discuss this with UL. It is my understanding that UL has some concerns about plated silver that do not apply to immersion silver. The concern as I understand it is the likelihood of silver migration which numerous studies have shown does not occur with immersion silver. Best regards Lee -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Eric Kalgren Sent: Wednesday, November 10, 2004 9:31 AM To: [log in to unmask] Subject: [TN] Electrodeposited Silver vs. Immersion Silver Good morning TechNet, One of our drawings for an RF PCB calls out "Silver Plate per QQ-S-365, electrodeposited, Type I, 0.0003" thk." The supplier that we are getting quotes from says he can't do electrodeposit and wants to supply immersion silver boards. Are these two processes equivalent? I searched the archives and cannot find any references to ED silver. Has immersion replaced this process? (Our drawing is pretty old.) The board material is Duroid 5880. would this make a difference? Thanks for your help! Eric Kalgren Manufacturing Engineer Atlantic Microwave Phone: 978-779-7062 Fax: 978-779-0101 --------------------------------------------------- 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 -----------------------------------------------------