Zhang, S., Liu, Y., Juvert, J., Tian, P., Navarro, J.-C., Cooper, J. M. and Neale, S. L. (2016) Use of optoelectronic tweezers in manufacturing – accurate solder bead positioning. Applied Physics Letters, 109(22), 221110. (doi: 10.1063/1.4971348)
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Abstract
In this work, we analyze the use of optoelectronic tweezers (OETs) to manipulate 45 μm diameter Sn62Pb36Ag2 solder beads with light-induced dielectrophoresis force and we demonstrate high positioning accuracy. It was found that the positional deviation of the solder beads increases with the increase of the trap size. To clarify the underlying mechanism, simulations based on the integration of the Maxwell stress tensor were used to study the force profiles of OET traps with different sizes. It was found that the solder beads felt a 0.1 nN static friction or stiction force due to electrical forces pulling them towards the surface and that this force is not dependent on the size of the trap. The stiction limits the positioning accuracy; however, we show that by choosing a trap that is just larger than the solder bead sub-micron positional accuracy can be achieved.
| Item Type: | Articles |
|---|---|
| Additional Information: | This work was also funded by EPSRC award EP/L00044X to the University of Southampton. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Neale, Dr Steven and Cooper, Professor Jonathan and Juvert, Dr Joan and Zhang, Dr Shuailong |
| Authors: | Zhang, S., Liu, Y., Juvert, J., Tian, P., Navarro, J.-C., Cooper, J. M., and Neale, S. L. |
| College/School: | College of Science and Engineering > School of Engineering College of Science and Engineering > School of Engineering > Biomedical Engineering College of Science and Engineering > School of Engineering > Systems Power and Energy |
| Journal Name: | Applied Physics Letters |
| Publisher: | AIP Publishing |
| ISSN: | 0003-6951 |
| ISSN (Online): | 1077-3118 |
| Published Online: | 02 December 2016 |
| Copyright Holders: | Copyright © 2016 The Authors |
| First Published: | First published in Applied Physics Letters 109(22):221110 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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