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Why do we measure resistivity instead of resistance to verify metal deposition (for thermal evaporation)?

Why do we measure resistivity instead of resistance to verify metal deposition (for thermal evaporation)?

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Answer #1

Let's Understand the difference between both the terms. The answer lies in the definition itself.

Resistance is the opposition of the flow of current.Unit of measurement is Ohm(). R=E/I.

Whereas, Resistivity is the measure of Resistance. Its unit is Ohm-metre(?-m). ?=RA/L.

Moreover, Resistivity is specific to a particular substance, that is every metal has a fixed number for resistivity. For example, the resistivvity for pure copper is 1.68x10^-8?-m.

Resistance is dependent on the dimensions of the particular material such as the length and Area of the substance.

Therefore, it is more accurate and convinient to verify metal depostion using the resistivity rather the resistance.

Hope, this answer clarifies your doubt. In case of any issues, please ask in the comments section. Thanks.

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