Nonlinear Contacts of Conductors with Rough Surfaces

Dayan, Amir, Huang, Yi ORCID: 0000-0001-7774-1024, Gustafsson, Mattias, Olsson, Torbjorn and Schuchinsky, Alex (2024) Nonlinear Contacts of Conductors with Rough Surfaces In: 2024 IEEE International Conference on Microwaves, Communications, Antennas, Biomedical Engineering and Electronic Systems (COMCAS), 2024-7-9 - 2024-7-11.

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Abstract

The sources of passive nonlinearities are examined in contact joints of rough conductors. The proposed model of the tunnelling current in MIM contact junctions is discussed in comparison with the Simmons and WKB models. It is shown that our model correlates well with WKB approximation when thickness of the thin insulating layer is commensurate with the lattice period. Mechanical deformations of the contact area are also quantified for a single and multiple junctions. The contact areas are evaluated at different stages of asperity compression, and the explicit expressions are presented for the two cases: (i) weak elastic deformations and (ii) strong plastic deformations of the flattened contact frustums. The thermal effect on the current density is assessed by comparison of the developed model with the WKB approximation. The performed simulations shows that the temperature variations weakly affect the contact resistivity of the contact junctions of rough conductors.

Item Type:	Conference Item (Unspecified)
Uncontrolled Keywords:	Passive nonlinearity, nonlinear resistivity, tunnelling charges, rough surfaces, contact deformations
Divisions:	Faculty of Science & Engineering Faculty of Science & Engineering > School of Electrical Engineering, Electronics and Computer Science
Depositing User:	Symplectic Admin
Date Deposited:	10 Mar 2025 09:30
Last Modified:	23 May 2026 09:24
DOI:	10.1109/COMCAS58210.2024.10666231
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3190740
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