Al, what proffesional a presentation! You really need help? I'm not a board specialist myself, but have seen a lot from my many years as 'monocle'. I just say: high asperity! I'll send you off line a list on 17 good papers that will lead you through the mystery of blowholes, flux contaminations, flux capping, copper barrel corrosion etc. Guess everything about PTH hole filling exist in TN's archive, but I don't have time to do searching. We accept no such voids, not for MIL nor for COM. IPC-600 G says nothing about voids. Good Luck. Ingemar Hernefjord Ericsson Microwave Systems -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Al Onderick Sent: den 24 maj 2005 21:44 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 -----------------------------------------------------