Thin film resistance - QuickField simulation example
Electric current is passing through the steel thin film with two electrodes attached.
How to find electrical resistance of thin conductive film?
Answer Typical applications Geometry
Given Task Solution Analytical solution*: Result
Reference: * Roland Schinzinger, Patricio A. A. Laura Conformal Mapping: Methods and Applications, 1991, Elsevier Science Publishers, B.V., p. 224. ISBN 0-486-43236-X (pbk).
Engineering question
Set up a plane-parallel QuickField DC Conduction problem for a thin conductive film and evaluate electrical resistance from computed field results.
thin conductive films, resistive heater films, sheet conductors
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Simulation problem
Problem Type
Plane-parallel problem of DC conduction.
h = 6 mm, g = 20 mm, d = 1 mm - thickness of the film
Electrical conductivity of the steel σ = 10 MS/m,
Voltage drop ΔU = 0.02 V.
Calculate the resistance of the steel film and compare with the analytical result.
Current through the surface I is calculated in QuickField and then the resistance may be found using the Ohm's law:
R = ΔU / I
R = (g/h + 0.469) / (σ·d).
QuickField: R = 0.02/52.6 = 3.80·10-4 Ohm.
Analytical solution: R = (0.020/0.006+0.469) / (10'000'000 · 0.001) = 3.80·10-4 Ohm.
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