Thank you George! Our company had to stop processing OSP due to expense. OSP is okay if you run alot of it. But, when the bath sets for days at a time, the chemicals degrade. Replenishment/shelflife issues made it prohibitively expensive. At 07:39 AM 08/15/2005, you wrote: >ENIG is the number one choice for a contacting surface. >At the IPC Plating Committee round robin testing with ENIG as a contact >surface indicated >1000,000 actuations without any change in resistivity. > >With good process control ENIG is free of "Black Pad" issues. The new IPC >ENIG specifications 4553, that specifies less immersion gold (2-4 uins) has >virtually eliminated BP. > >Do we stop using electroless copper because of occasional voiding, or inner >layer separation? > >Do we stop using electrolytic copper because we occasionally have copper >cracks? > >Do we stop etching because of oevr hang and undercut? > >PCB manufacturing is all about "PROCESS CONTROL" >ENIG is no different. > >I agree that Immersion Silver has a lot of potential as a finish also. > >Best regards > >George Milad >[log in to unmask] >National Accounts Manager for Technology >Uyemura International Corporation >Technical Center >240 Town LIne Rd >Southington CT 06489 >(516) 901 3874 (mobile) >(860) 793-4011 (office) >(860) 793-4020 (fax) > >--------------------------------------------------- >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 -----------------------------------------------------