Influence of non-ideal circumferential contacts on errors in the measurements of the resistivity of layers using the van der Pauw method

Náhlı́k, Josef; Kašpárková, Irena; Fitl, Přemysl

doi:10.1016/j.measurement.2012.10.028

Cited by 10 publications

(4 citation statements)

References 8 publications

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“…As shown in figure 5, the effect of the electrode radian angle on CF is not significant, and CF is nearly equal to 1. Náhlík et al [32] reported this phenomenon and indicated that the width of circumferential contacts dose not affect the value of the measured resistivity under the equal length situation. shows the unequal length situation, and the electrode height is equal to 0.01H, where H is the cylinder height.…”

Section: Electrode Width Effectmentioning

confidence: 91%

A novel resistivity measurement method for a homogeneous cylinder shape based on the vdP configuration

Ma¹,

Chen²,

YiFei³

et al. 2022

Meas. Sci. Technol.

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The electrical resistivity method for a cylinder shape is an essential method for reflecting physical properties. However, the use of a nondestructive resistivity method with the circumferential cross-section arrangement for working components remains challenging. This paper provides a simple novel resistivity method for a cylinder shape based on the vdP configuration, with four electrodes placed near the middle cross-section layer of shape. First, the theoretical solution formulae for the electrostatic potential function in the cylindrical coordinate system are derived. Then, the effect of the electrode and shape size is analysed. The results show that the electrode height is less than 1% of the cylinder height and the radian angle is less than 10°, where the electrode size effect on the correction factor (CF) can be ignored, and CF rarely depends on the cylinder shape. Finally, a prototype is designed, and the proposed method is verified in laboratory tests using geomaterials. The performance of the proposed method for fine soil at high moisture contents is found to be better than that at low moisture contents.

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Section: Electrode Width Effectmentioning

confidence: 91%

A novel resistivity measurement method for a homogeneous cylinder shape based on the vdP configuration

Ma¹,

Chen²,

YiFei³

et al. 2022

Meas. Sci. Technol.

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“…If  ln(2) ( 3 − 4 ) = 2 does not hold, we can use equations [6] and [7] to calculate the contact resistances and deduce the intrinsic potentials V´i for the four corners. Having these potentials we can follow the procedure explained above.…”

Section: 1-theorymentioning

confidence: 99%

A robust method to determine the contact resistance using the van der Pauw set up

et al. 2017

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The van der Pauw method to calculate the sheet resistance and the mobility of a semiconductor is a pervasive technique both in the microelectronics industry and in the condensed matter science field. There are hundreds of papers dealing with the influence of the contact size, nonuniformities and other second order effects. In this paper we will develop a simple methodology to evaluate the error produced by finite size contacts, detect the presence of contact resistance, calculate it for each contact, and determine the linear or rectifying behavior of the contact. We will also calculate the errors produced by the use of voltmeters with finite input resistance in relation with the sample sheet resistance.

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“…It can be applied to semiconductors and metals [ 25 , 26 , 27 ]. This method enables the determination of surface resistance or resistivity of a thin material coating or layer [ 28 , 29 ]. The technique is beneficial for measuring the properties of irregularly shaped pieces and complex structures like flat textile products [ 20 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Influence of Fabric Structure on Their Electro-Conductive Properties

Tokarska,

Gebremariam,

Puszkarz

2024

Materials

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Electro-conductive fabrics are key materials for designing and developing wearable smart textiles. The properties of textile materials depend on the production method, the technique which leads to high conductivity, and the structure. The aim of the research work was to determine the factors affecting the electrical conductivity of woven fabrics and elucidate the mechanism of electric current conduction through this complex, aperiodic textile material. The chemical composition of the material surface was identified using scanning electron microscopy energy dispersion X-ray spectroscopy. The van der Pauw method was employed for multidirectional resistance measurements. The coefficient was determined for the assessment of the electrical anisotropy of woven fabrics. X-ray micro-computed tomography was used for 3D woven structure geometry analysis. The anisotropy coefficient enabled the classification of electro-conductive fabrics in terms of isotropic or anisotropic materials. It was found that the increase in weft density results in an increase in sample anisotropy. The rise in thread width can lead to smaller electrical in-plane anisotropy. The threads are unevenly distributed in woven fabric, and their widths are not constant, which is reflected in the anisotropy coefficient values depending on the electrode arrangement. The smaller the fabric area covered by four electrodes, the fewer factors leading to structure aperiodicity.

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Influence of non-ideal circumferential contacts on errors in the measurements of the resistivity of layers using the van der Pauw method

Cited by 10 publications

References 8 publications

A novel resistivity measurement method for a homogeneous cylinder shape based on the vdP configuration

A novel resistivity measurement method for a homogeneous cylinder shape based on the vdP configuration

A robust method to determine the contact resistance using the van der Pauw set up

Assessment of the Influence of Fabric Structure on Their Electro-Conductive Properties

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