Capillary Self-Alignment of Microchips on Soft Substrates
AbstractSoft micro devices and stretchable electronics have attracted great interest for their potential applications in sensory skins and wearable bio-integrated devices. One of the most important steps in building printed circuits is the alignment of assembled micro objects. Previously, the capillary self-alignment of microchips driven by surface tension effects has been shown to be able to achieve high-throughput and high-precision in the integration of micro parts on rigid hydrophilic/superhydrophobic patterned surfaces. In this paper, the self-alignment of microchips on a patterned soft and stretchable substrate, which consists of hydrophilic pads surrounded by a superhydrophobic polydimethylsiloxane (PDMS) background, is demonstrated for the first time. A simple process has been developed for making superhydrophobic soft surface by replicating nanostructures of black silicon onto a PDMS surface. Different kinds of PDMS have been investigated, and the parameters for fabricating superhydrophobic PDMS have been optimized. A self-alignment strategy has been proposed that can result in reliable self-alignment on a soft PDMS substrate. Our results show that capillary self-alignment has great potential for building soft printed circuits. View Full-Text
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Chang, B.; Zhou, Q.; Wu, Z.; Liu, Z.; Ras, R.H.A.; Hjort, K. Capillary Self-Alignment of Microchips on Soft Substrates. Micromachines 2016, 7, 41.
Chang B, Zhou Q, Wu Z, Liu Z, Ras RHA, Hjort K. Capillary Self-Alignment of Microchips on Soft Substrates. Micromachines. 2016; 7(3):41.Chicago/Turabian Style
Chang, Bo; Zhou, Quan; Wu, Zhigang; Liu, Zhenhua; Ras, Robin H.A.; Hjort, Klas. 2016. "Capillary Self-Alignment of Microchips on Soft Substrates." Micromachines 7, no. 3: 41.
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