Steve, I cast my vote with George and Dave. I like soldering to copper. Guy -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Steven Kelly Sent: Thursday, July 07, 2011 4:18 PM To: [log in to unmask] Subject: Re: [TN] Leaded or non Customer supplied the components and these are prototypes so they may change in the future. My CTE's are as good as I can get in a rigid flex and I have already reflowed some x-outs 6 times with no issues - not the world's best test but it tells me something. The BGA's are on the rigid portion of the rigid flex. Regards Steve -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Harp, Ken Sent: July-07-11 4:05 PM To: [log in to unmask] Subject: Re: [TN] Leaded or non You might want to have a look at IPC-D-279 and IPC-7095. I'd concur with the re-ball comment, and you should definitely check your CTEs and board-to-BGA temp rises to determine if you have an adequate CTE match (IPC-D-279 provides a modeling tool for this). Are you installing the BGAs directly on the rigid-flex? I miss Werner. - Ken -----Original Message----- From: Amol Kane [mailto:[log in to unmask]] Sent: Thursday, July 07, 2011 1:00 PM To: [log in to unmask] Subject: Re: [TN] Leaded or non If it’s a hi end military product, how is lead-free acceptable? Can you re-ball to SnPb balls?.....if not,i would go with ImmAg and LF Amol Kane | Process Engineer Catalyst Manufacturing Services, Inc. 941 Route 38, Owego NY 13827 Phone: (607) 687-7669 Extn 349 | Website: www.catalystems.com -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of [log in to unmask] Sent: Thursday, July 07, 2011 3:40 PM To: [log in to unmask] Subject: Re: [TN] Leaded or non If the BGAs are lead free, you should process the lead free technology. What about the HASL leaf free? Best regards Reuven ROKAH Technologies The PCB & PCBA chief Mobile: 972-52-6012018 Mail: [log in to unmask] ב-7 ביול 2011, בשעה 20:56, Steven Kelly <[log in to unmask]> כתב/ה: > Hi All, > I have an 18 layer rigid flex (buried and blind) that we are preparing to put the surface finish on and then assemble. > Lots of BGA's etc. > The BGA's are lead free. > Options: > > 1) ENIG and lead free assembly > > 2) Immersion silver and lead free assembly > > 3) HASL and leaded assembly > Hi end military product. > > Thoughts or comments would be appreciated. > Thanks. Steve Kelly > > --------------------------------------------------- > Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For > additional information, or contact Keach Sasamori at [log in to unmask] or > 847-615-7100 ext.2815 > ----------------------------------------------------- ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------