Correction factor for four-probe resistivity measurements on resistive sheets with parallel electrodes

✍ Scribed by Makoto Kanagawa

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 501 KB
• Volume: 84
• Category: Article
• ISSN: 8756-663X
• DOI: 10.1002/ecjb.1056

✦ Synopsis

Abstract

This article discusses the use of the four‐probe method for direct measurements of the resistance per square of a resistive sheet with parallel electrodes. These measurements must be adjusted by a correction factor, which is calculated in this work by modeling the resistive sheet as a two‐dimensional square with opposing cylindrical electrodes and setting the resistance of the electrodes equal to zero. The correction factor is then computed by postulating the boundary condition that the potentials on the two sides are constant. Although it is the resistive sheet with parallel electrodes that controls the performance of the resistive‐sheet pressure response type of digitizer, this performance has been evaluated only by indirect methods. Nevertheless, the simulations and experiments described in this paper confirm that the resistance per square of a resistive sheet with parallel electrodes can be measured by the four‐probe method when the correction factor derived here is used. © 2001 Scripta Technica, Electron Comm Jpn Pt 2, 84(9): 36–45, 2001