Francis, A company I support has been using Immersion Silver for at least a couple of years. We had to tighten packaging, handling and storage practices. Our results have been excellent. We did not have to change profile parameters, solder paste, flux etc. The types of boards being processed are approx. 9" x 17". Typically having 12 to 16 BGA's, fine pitch, etc.. Double sided, mixed technology assemblies. Gloves should be worn when handling the boards. The finish is susceptible to oxidation/tarnishing, if not stored in a moisture free environment. The boards should be vacuum sealed with sulfur free paper placed between boards. The recommended shelf life of the finish is 6 months. Our biggest issue was getting consigned material from customers who violated these practices. Regards, Rey Sosa Pentagon-EMS (503) 924-2747 -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Francis Sun Sent: Wednesday, October 16, 2002 6:10 AM To: [log in to unmask] Subject: [TN] Sterling silver finish Hello Technet, We were approached by our board shop to have some of our boards finished with Immersion silver. I hope that someone can provide me, off-line if required, their experiences with it, be it positive or negative. Do I have to change my process? thermal profile, solderpaste, flux, etc Here are the selling points: Very flat finish, great for QFPs, MBGAs, 402 packages. No nickel therefore, no embrittlement or black pad issues. Ay feedback is appreciated. TIA Regards; Francis Sun MARK IV Industries (905) 624-3025 ext. 1235 Fax: (905) 624-4572 ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- --------------------------------------------------- Technet Mail List provided as a free 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------