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


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