Al - Surface finish is immersion silver? By any chance is this also a lead free assembly? Bruce Tostevin Benchmark Electronics Hudson, NH -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Al Onderick Sent: Tuesday, May 24, 2005 3:44 PM To: [log in to unmask] Subject: [TN] Solder Joint Anomaly Dear Technetters, I now have a couple of cross sections to go along with my xrays. Does anyone have an idea what might cause this type of anomaly? http://www.texas-gold.org/PCB/pages/xray/index.htm Is this a problem or just a strange looking void ? The board supplier is going to run the following tests * Cross section the 15 pin connector area for optical microscopy and analysis. * Scanning Electron Microscopy (SEM) analysis of solder filled and bare silver hole wall surfaces o SEM will identify particulate or other 3-dimensional bodies to be analyzed with EDS. * Energy Dispersive Spectometry (EDS) analysis of solder filled and bare silver hole wall surfaces o EDS will identify the all elements relative to the point of failure to identify possible contributors as the root cause. * X-Ray Fluorescence of bare silver hole wall surfaces o XRF will determine the thickness of the solder deposit in the hole walls in the 15 pin connector area. -Al --------------------------------------------------- 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 -----------------------------------------------------