Micro/Nano Devices and Its Tribology

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "E:Engineering and Technology".

Deadline for manuscript submissions: closed (31 January 2021) | Viewed by 4398

Special Issue Editor


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Guest Editor
School of Mechanical Engineering, Gyeongsang National University, Jinju-si 52828, Republic of Korea
Interests: soft electronics; flexible/stretchable devices; MEMS; surface engineering; tribology

Special Issue Information

Dear Colleagues,

The interest and demand for micro-/nanoscale devices have been steadily growing in line with rapid advancements in the fabrication and manufacturing processes over the past decades. With the development of more sophisticated manufacturing process (e.g., EUV, extreme ultraviolet), the minimum dimensions of electronic device components have reached down to several nm in order to maximize the level of integration and enhance the performance within a limited volume. Nevertheless, reducing the dimensions has resulted in changes in the mechanical, physical, and chemical properties, which have accelerated the tribological failure of components at the micro-/nanoscale. In this regard, not only is a fundamental understanding of the failure mechanisms required but profound solutions are also essential for overcoming such failure issues. Accordingly, this Special Issue seeks to showcase research papers, short communications, and review articles that focus on the tribology of microelectronic devices, soft electronics, MEMS, and other microelectronic devices for tribological applications. Of interest are also papers that examine the tribological properties (i.e., friction, wear, surface engineering, and durability, to name a few) of novel materials for microelectronic devices.

We look forward to receiving your submissions!

Dr. Hae-Jin Kim
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Micromachines is an international peer-reviewed open access monthly journal published by MDPI.

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Keywords

  • tribology of microelectronic devices
  • tribology of soft electronics
  • tribology of MEMS
  • microelectronic devices for tribological applications
  • tribological properties of the materials for microelectronic devices

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Published Papers (2 papers)

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Research

23 pages, 12820 KiB  
Article
Thermo-Elasto-Hydrodynamic Characteristics Analysis of Journal Microbearing Lubricated with Rarefied Gas
by Yao Wu, Lihua Yang, Tengfei Xu and Wei Wu
Micromachines 2020, 11(11), 955; https://doi.org/10.3390/mi11110955 - 22 Oct 2020
Cited by 5 | Viewed by 1904
Abstract
Temperature rise and elastic deformation are unavoidable issues occurring in high-speed gas microbearings due to the dominant small-scale fluid dynamics in rarefied gas flow applications. In this paper, thermo-elasto-aerodynamic analysis requires simultaneously solving the modified Reynolds equation, modified energy equation, temperature–viscosity relationship and [...] Read more.
Temperature rise and elastic deformation are unavoidable issues occurring in high-speed gas microbearings due to the dominant small-scale fluid dynamics in rarefied gas flow applications. In this paper, thermo-elasto-aerodynamic analysis requires simultaneously solving the modified Reynolds equation, modified energy equation, temperature–viscosity relationship and the elasticity equations for predicting the lubrication characteristics of microbearings. A thermo-elasto-aerodynamic lubrication is systematically investigated by using the partial derivative method, finite difference formulation and the finite element approach. The results indicate that, compared with rigid microbearing which has a constant viscosity gas lubricant, the temperature effect increases the load capacity, friction coefficient and stiffness coefficients, and it decreases the attitude angle and damping coefficients of the microbearing. The flexibility of the bearing pad also leads to the increase in load capacity and direct stiffness coefficients, while it remains to further decrease the direct damping coefficients on the basis of thermo-aerodynamic performance. The present study is conducive to accurately analyze the microscopic flow properties in a microbearing-rotor system. Full article
(This article belongs to the Special Issue Micro/Nano Devices and Its Tribology)
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18 pages, 11366 KiB  
Article
Influence of Temperature Effect on the Static and Dynamic Performance of Gas-Lubricated Microbearings
by Liangliang Li, Zhufeng Liu, Chongyu Wang and Yonghui Xie
Micromachines 2020, 11(8), 716; https://doi.org/10.3390/mi11080716 - 24 Jul 2020
Cited by 4 | Viewed by 1909
Abstract
Gas-lubricated microbearings are widely applied in multiple fields due to their advantages of high-speed, low friction level and other features. The operating environment of microbearings is complex, and the difference of temperature has an important influence on their comprehensive performance. In this investigation, [...] Read more.
Gas-lubricated microbearings are widely applied in multiple fields due to their advantages of high-speed, low friction level and other features. The operating environment of microbearings is complex, and the difference of temperature has an important influence on their comprehensive performance. In this investigation, FEM (finite element method) is employed to investigate the static, dynamic and limit characteristics of microbearings lubricated by different kinds of gas at different temperatures. The results show that the rise of temperature leads to the decline of equivalent viscosity of gas, which weakens the load capacity of microbearings, and furthermore, affects the operating stability of microbearings. The dynamic performances of microbearings at different temperatures are very different, and the two dynamic limit characteristics are more sensitive to temperature when it changes. Full article
(This article belongs to the Special Issue Micro/Nano Devices and Its Tribology)
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