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Thread 349/68

Electrical conductivity measurement of plated metals

How does one measure the electrical conductivity of electroplated metals? Is 4-point probe method used for silicon is suitable for metals?

A. Kumar
Microfabrica - Burbank, California
2005
publicly reply to A. Kumar

It's suitable, provided the substrate beneath the plating is non-conducting, which of course is false for most electroplating. So it's a bit of a problem.
If you use an eddy-current probe, choosing the right frequency will reduce the amount of substrate conductivity included in the measurement, but then it's difficult to be accurate, and the exact thickness of the plating must be known by other means..

James Swenson
- Los Angeles, California, USA
2005
publicly reply to James Swenson

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