A conductivity sensor includes a sensor body having an inner surface and an outer surface. A first and a second electrode formed of a solid conducting material are positioned through the inner surface of sensor body. An epoxy resin is positioned in the inner surface of the sensor body thereby encapsulating a portion of the first and second electrode. The epoxy resin forms an active surface that exposes a first end of the first and a first end of the second electrode for conductivity measurement and forms a connector surface that exposes a second end of the first and a second end of the second electrode for electrically interfacing with a conductivity measurement circuit.

 
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> Pad surface finish for high routing density substrate of BGA packages

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