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

Shuailong Zhang, Yongpeng Liu, Yang Qian, Weizhen Li, Joan Juvert, Pengfei Tian, Jean-Claude Navarro, Alasdair W Clark, Erdan Gu, Martin D. Dawson, Jonathan M. Cooper, Steven L. Neale

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)
66 Downloads (Pure)


Optical micromanipulation allows the movement and patterning of discrete microparticles 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  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.
Original languageEnglish
Pages (from-to)28838-28850
Number of pages13
JournalOptics Express
Issue number23
Early online date7 Nov 2017
Publication statusPublished - 13 Nov 2017


  • optical tweezers
  • optical manipulation
  • optical fabrication
  • optomechanics


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