A Guide to Sheet Resistance
Posted on Fri, Dec 08, 2017 by Chris Bracher
Sheet resistance is the electrical resistance along a thin conductive film. It is inherently linked to the resistivity and thickness of the material being tested, and the measurement can be used to characterise thin films.
Whether you are new to the measurement or simply want a refresher on the topic - if you want to know more about what sheet resistance is, why it’s useful, or how it is measured - check out our sheet resistance theory guide.
In a concise manner, this guide explains the general theory behind sheet resistance, its applications, how it can be measured using a four-point probe, and how geometric correction factors are determined and applied.
At the end of the guide, the derivation of the four-point probe sheet resistance equation from first principles is shown - further explaining how the four-point probe measurement works.
Author: Chris Bracher
Chris joined Ossila in 2016 after completing a PhD in polymer & perovskite solar cells at the University of Sheffield. During his PhD, he gained expertise in photovoltaic device fabrication and characterisation, thin-film solution processing, & the construction of automated testing systems. Formerly part of the OFET & 2D materials teams at Ossila, he now focuses on the development of new test and measurement systems, with an emphasis on software.