Effect of roughness on electrical contact performance of electronic components

Liu, Xin-long; Cai, Zhenbing; Liu, Shanbang; Peng, Jinfang; Zhu, Minhao

doi:10.1016/j.microrel.2017.05.024

Cited by 15 publications

(5 citation statements)

References 21 publications

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“…Aluminum is much softer than the alumina and, therefore, any yielding can be assumed to be confined to the aluminum surface. From equation (3) and recalling the diameter of the alumina sphere to be 1 cm and applied load to be 68.6 N, the radius of the apparent contact area is predicted to be approximately 158.5 mm. Recalling the radius (178.88 mm) of the nominal contact area extracted from Figure 3, the prediction from the Hertzian theory has a good agreement with the experimental data.…”

Section: Modeling Methodologymentioning

confidence: 99%

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A comparison of nanoscale measurements with the theoretical models of real and nominal contact areas

Jackson

Chen

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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In this study, an experimental method is proposed to measure the real area of contact between an alumina sphere and an Al surface based on the adhesive transfer of the Au film and the scanning electron microscope in the back-scattered mode. A thin film of Au is sputtered on the alumina sphere before the indentation with the Al surface. After indentation, the interfaces of the alumina sphere and Al surface are observed by the scanning electron microscope. The contact area can be identified based on both the distributions of the alumina and Au on the alumina sphere and Al surface, respectively. The measured contact area at different nominal pressures are compared to predictions made by several popular theoretical elastic-plastic rough surface contact models.

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Section: Modeling Methodologymentioning

confidence: 99%

“…Roughness' existence is the key factor for many phenomena in the electrical connectors (e.g. the contact resistance, 1 Joule heating, 2 and fretting 3 ). An accurate measurement of the real area of contact is essential to the research and development of a reliable and efficient electrical connector.…”

Section: Introductionmentioning

confidence: 99%

A comparison of nanoscale measurements with the theoretical models of real and nominal contact areas

Jackson

Chen

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…These results agree well with the change in the contact resistance and mass shown in Figure 5 . Research [ 40 , 41 ] has pointed out that a relatively uniform and smooth surface means more contact spots, thereby creating more electron transfer paths and reducing the contact resistance.…”

Section: Resultsmentioning

confidence: 99%

Quasi-Continuous Network Structure Greatly Improved the Anti-Arc-Erosion Capability of Ag/Y2O3 Electrical Contacts

et al. 2022

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Ag/Y2O3 has excellent potential to replace Ag/CdO as the environmentally friendly electrical contact material. Using spherical Y2O3 as the starting material, Ag/Y2O3 contacts with a quasi-continuous network structure were successfully fabricated by a low-energy ball milling treatment. The mean size of Y2O3 used ranged from 243 to 980 nm. Due to the differences in the size of Y2O3, Ag/Y2O3 contacts had different primitive microstructures, thereby exhibiting distinctive anti-arc-erosion capabilities. Ag/Y2O3 contact prepared using 243 nm Y2O3 showed the best anti-arc-erosion capability and the most outstanding electrical performance measures, such as low contact resistance, less mass transfer, and no failure up to 105 cycle times. The quasi-continuous network structure formed in the fine-scare was responsible for the excellent electrical performance. The short distance between Y2O3 particles in the network promoted the cathode arc motion, and thus alleviated the localized erosion. The results obtained herein may inspire further attempts to design electrical contacts rationally.

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“…Displacement was measured using a laser sensor (figure 2(a)7). The sensor (figure 2(a)3)) placed under the lower sample was used to measure friction forces and normal loads and transmit data to the data acquisition system [17,18]. Different atmospheres were introduced into the sealed cowling (figure 2(b)), including oxygen-free atmosphere (nitrogen), oxygen, and air at room temperature.…”

Section: Methodsmentioning

confidence: 99%

Effect of different atmospheres on the electrical contact performance of electronic components under fretting wear

Liu¹,

Cai²,

Cui³

et al. 2018

J. Phys. D: Appl. Phys.

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The effects of oxide etch on the surface morphology of metals for industrial application is a common cause of electrical contacts failure, and it has becomes a more severe problem with the miniaturization of modern electronic devices. This study investigated the effects of electrical contact resistance on the contactor under three different atmospheres (oxygen, air, and nitrogen) based on 99.9% copper/pogo pins contacts through fretting experiments. The results showed the minimum and stable electrical contact resistance value when shrouded in the nitrogen environment and with high friction coefficient. The rich oxygen environment promotes the formation of cuprous oxide, thereby the electrical contact resistance increases. Scanning electron microscope microscopy and electron probe microanalysis were used to analyze the morphology and distribution of elements of the wear area, respectively. The surface product between contacts was investigated by x-ray photoelectron spectroscopy analysis to explain the different electrical contact properties of the three tested samples during fretting.

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Effect of roughness on electrical contact performance of electronic components

Cited by 15 publications

References 21 publications

A comparison of nanoscale measurements with the theoretical models of real and nominal contact areas

A comparison of nanoscale measurements with the theoretical models of real and nominal contact areas

Quasi-Continuous Network Structure Greatly Improved the Anti-Arc-Erosion Capability of Ag/Y2O3 Electrical Contacts

Effect of different atmospheres on the electrical contact performance of electronic components under fretting wear

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