Abstract
This paper reports an arbitrary-shape designable fabrication of three-dimensional (3D) micro-Rogowski coil inside silica glass by means of femtosecond laser wet etches and metal microsolidics. The dimension of the fabricated micro-Rogowski coil is 800 μm, and the aspect ratio of the structure reaches about 300. The alloys of Bi/In/Sn/Pb with high melting point were used as the conductive metal. The inductance of micro-Rogowski coil is 113.58 nH at 10 kHz and 14.11 nH at 120 MHz, respectively. The embedded 3D micro-Rogowski coils can be easily integrated with other microelectrical, mechanical and optical systems, which could be widely applied in MEMS, sensors and lab-on-chips.
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This work is supported by the National Science Foundation of China under the Grant Nos. 51335008, 61275008 and 61176113, the Special-funded program on National Key Scientific Instruments and Equipment Development of China under the Grant No. 2012YQ12004706.
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Meng, X., Yang, Q., Chen, F. et al. Fabrication of three-dimensional micro-Rogowski coil based on femtosecond laser micromachining. Appl. Phys. A 120, 669–674 (2015). https://doi.org/10.1007/s00339-015-9236-7
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DOI: https://doi.org/10.1007/s00339-015-9236-7