Manufacturing with light – micro-assembly of opto-electronic microstructures

Zhang, S. et al. (2017) Manufacturing with light – micro-assembly of opto-electronic microstructures. Optics Express, 25(23), pp. 28838-28850. (doi: 10.1364/OE.25.028838)

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Optical micromanipulation allows the movement and patterning of discrete micro-particles within a liquid environment. However, for manufacturing applications it is desirable to remove the liquid, leaving the patterned particles in place. In this work, we have demonstrated the use of optoelectronic tweezers (OET) to manipulate and accurately assemble Sn62Pb36Ag2 solder microspheres into tailored patterns. A technique based on freeze-drying technology was then developed that allows the assembled patterns to be well preserved and fixed in place after the liquid medium in the OET device is removed. After removing the liquid from the OET device and subsequently heating the assembled pattern and melting the solder microspheres, electrical connections between the microspheres were formed, creating a permanent conductive bridge between two isolated metal electrodes. Although this method is demonstrated with 40 µm diameter solder beads arranged with OET, it could be applied to a great range of discrete components from nanowires to optoelectronic devices, thus overcoming one of the basic hurdles in using optical micromanipulation techniques in a manufacturing micro-assembly setting.

Item Type:Articles
Additional Information:Funding: Engineering and Physical Sciences Research Council (EPSRC) (EP/L022257/1, EP/L00044X/1).
Glasgow Author(s) Enlighten ID:Neale, Dr Steven and Juvert, Dr Joan and Zhang, Dr Shuailong and Cooper, Professor Jonathan and LI, WEIZHEN and Qian, Yang and Clark, Professor Alasdair
Authors: Zhang, S., Liu, Y., Qian, Y., Li, W., Juvert, J., Tian, P., Navarro, J.-C., Clark, A. W., Gu, E., Dawson, M. D., Cooper, J., and Neale, S.
College/School:College of Science and Engineering > School of Engineering > Biomedical Engineering
College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Optics Express
Publisher:Optical Society of America
ISSN (Online):1094-4087
Copyright Holders:Copyright © 2017 Journal
First Published:First published in Optics Express 25:28838-28850
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
652331Assembly of electronic components with Optoelectronic TweezersSteven NealeEngineering and Physical Sciences Research Council (EPSRC)EP/L022257/1ENG - BIOMEDICAL ENGINEERING