We use Immersion Silver for all fine pitch boards 25 mil or less. It's flat, less costly than HASL, is a drop in replacement for HASL at oven and wave solder, has good shelf life and electrical properties. We build many BGA assemblies. Dave C. -----Original Message----- From: gaby [mailto:[log in to unmask]] Sent: Thursday, May 29, 2003 6:10 PM To: [log in to unmask] Subject: Re: [TN] Enig? HASL? http://www.circuitree.com/CDA/ArticleInformation/features/BNP__Features__Ite m/0,2133,97634,00.html <http://www.circuitree.com/CDA/ArticleInformation/features/BNP__Features__It em/0,2133,97634,00.html> ----- Original Message ----- From: Ervin <mailto:[log in to unmask]> Weisz To: [log in to unmask] <mailto:[log in to unmask]> Sent: Thursday, May 29, 2003 11:38 PM Subject: [TN] Enig? HASL? Dear Technetters, As many others, I am considered about the "ENIG vs. HASL vs. another few finishes". I wonder what do people specify in those industries that require 0 failures: defense industry, automotive, aerospace, etc. Mainly, I would like to know what do companies in such fields specify for boards that are populated with small BGAs (0.032" pitch and lower), also known as CSPs.Boards that have very high reliability requirements and have advances packages - what surface finish is required/recommended for the boards ?? I would appreciate links to existing specs., personal information, or anything you can spare on this subject. Thanks, Yehuda Weisz Process Engineer - PCB production _____ Do you Yahoo!? --------------------------------------------------- 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 ----------------------------------------------------- Free online <http://us.rd.yahoo.com/mail_us/tag/*http://calendar.yahoo.com> calendar with sync to Outlook(TM). --------------------------------------------------- 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 -----------------------------------------------------