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Picture
of the Week
EDS Mapping of AgS Growth
When your choice of component is not capable of surviving its end use environment. This is AgS growing on the surface of an inexpensive SMT chip resistor network, the final assembly being sold to a location with significant air pollution in SE Asia. There were multiple RN’s on this PWB and all showed evidence of AgS growth and changes in resistance resulting in failure of the module.
AgS Growth on resistor
When your choice of component is not capable of surviving its end use environment. This is AgS growing on the surface of an inexpensive SMT chip resistor network, the final assembly being sold to a location with significant air pollution in SE Asia. There were multiple RN’s on this PWB and all showed evidence of AgS growth and changes in resistance resulting in failure of the module.
Edge Proximity
What happens when you place conductors too close to score line
Incomplete Via Fill
Appears someone forgot to complete the plating cycle on this filled via
Head in Pillow
Head in Pillow defects on adjacent pads, perhaps we should play the lottery?
Hyper Corrosion
Yet another example of hyper-corrosion detected by S T and S that was completely missed by the supplier. Is your supplier missing hyper-corrosion on your product?
Interconnect issues???
How not to design for compliant pin.
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