Two- and Three-dimensional Arrays of Magnetic Microspheres

Two- and Three-dimensional Arrays of Magnetic Microspheres

A novel fabrication approach for two- and three-dimensional arrays of magnetic microspheres is presented in this paper. The magnetic microsphere is made from 47 μm size Al2O3 spheres onto which a 2–3 μm thick nickel layer is coated through electroless plating. After proper anneal, the outer nickel l...

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Veröffentlicht in:Journal of materials research 1999-04, Vol.14 (4), p.1186-1189
Hauptverfasser: Wen, Weijia, Wang, Ning, Zheng, D. W., Chen, C., Tu, K. N.
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container_issue 4
container_start_page 1186
container_title Journal of materials research
container_volume 14
creator Wen, Weijia
Wang, Ning
Zheng, D. W.
Chen, C.
Tu, K. N.
description A novel fabrication approach for two- and three-dimensional arrays of magnetic microspheres is presented in this paper. The magnetic microsphere is made from 47 μm size Al2O3 spheres onto which a 2–3 μm thick nickel layer is coated through electroless plating. After proper anneal, the outer nickel layer is converted to exhibit a crystalline structure. As an example for utilizing such magnetic microspheres, a two-dimensional, anisotropically conductive matrix is made by transferring the magnetic microsphere array from a template to a transparent adhesive tape using a magnetic attractive force. In addition, a three-dimensional array has also successfully been constructed on a metal plate. The two-dimensional conductor array may be useful for high-density circuit packaging applications in the semiconductor industry, and the three-dimensional array may open up a possibility for constructing three-dimensional photonic crystals.
doi_str_mv 10.1557/JMR.1999.0159
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title Two- and Three-dimensional Arrays of Magnetic Microspheres
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