It struck me that I never sent pics on 'normal' IMC layer to Steve's gallery as promised. In case someone is still interested, I'll send photos to the Master again. Thanks. Ingemar -----Original Message----- From: Ingemar Hernefjord (KC/EMW) Sent: den 2 februari 2005 08:57 To: 'TechNet E-Mail Forum'; 'Zweigart, Siegmund' Subject: RE: [TN] ENIG - Failures Interesting. Why just few nanometers? We found that 0.5 to 1.5 um seemed to be quite normal. I'll ask Mountain Jack to hang a skin on the wall. Not perfect a pic, but quite readable. In this case, Xilinx helped me, their specialists are VERY skilled. Ingemar Hernefjord Ericsson Microwave Systems PS. Steve, ready? -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Zweigart, Siegmund Sent: den 1 februari 2005 15:12 To: [log in to unmask] Subject: [TN] ENIG - Failures Hello all We see the following issue on an ENIG coated PCB (soldered with SnPb): After reflow solder joint is ok but cross section shows a quite irregular IMC phase (about 3 mikrometer thick, not homogenous, looks more like stones on a plane) After the following wave process (component is on the top side) solder joint is very fragile and in the cross section some fractures are seen. Has somebody any picture how a perfect IMC on ENIG should look like? I would expect a homogeous layer just a few nm thick. Any ideas? Siggi --------------------------------------------------- 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 -----------------------------------------------------