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Materials 2019, 12(7), 1002; https://doi.org/10.3390/ma12071002

Electroless-Deposited Platinum Antennas for Wireless Surface Acoustic Wave Sensors

1
Leibniz IFW Dresden, Helmholtzstraße 20, 01069 Dresden, Germany
2
Chair of Radio Frequency and Photonics Engineering, TU Dresden, Helmholtzstraße 10, 01069 Dresden, Germany
3
Industrial Engineering Department, German Jordanian University, Amman Madaba Street, P.O. Box 35247, Amman 11180, Jordan
4
Faculty 2 Environment and Natural Sciences, Department of Physical Chemistry, Brandenburg University of Technology Cottbus-Senftenberg, Universitätsplatz 1, 01968 Senftenberg, Germany
*
Author to whom correspondence should be addressed.
Received: 30 January 2019 / Revised: 13 March 2019 / Accepted: 15 March 2019 / Published: 27 March 2019
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Abstract

In an effort to develop a cost-efficient technology for wireless high-temperature surface acoustic wave sensors, this study presents an evaluation of a combined method that integrates physical vapor deposition with electroless deposition for the fabrication of platinum-based planar antennas. The proposed manufacturing process becomes attractive for narrow, thick, and sparse metallizations for antennas in the MHz to GHz frequency range. In detail, narrow platinum-based lines of a width down to 40 μm were electroless-deposited on γ-Al 2O 3 substrates using different seed layers. At first, the electrolyte chemistry was optimized to obtain the highest deposition rate. Films with various thickness were prepared and the electrical resistivity, microstructure, and chemical composition in the as-prepared state and after annealing at temperatures up to 1100 C were evaluated. Using these material parameters, the antenna was simulated with an electromagnetic full-wave simulation tool and then fabricated. The electrical parameters, including the S-parameters of the antenna, were measured. The agreement between the simulated and the realized antenna is then discussed. View Full-Text
Keywords: wireless SAW sensor; high-temperature; antenna; electroless deposition; platinum film wireless SAW sensor; high-temperature; antenna; electroless deposition; platinum film
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Brachmann, E.; Seifert, M.; Neumann, N.; Alshwawreh, N.; Uhlemann, M.; Menzel, S.B.; Acker, J.; Herold, S.; Hoffmann, V.; Gemming, T. Electroless-Deposited Platinum Antennas for Wireless Surface Acoustic Wave Sensors. Materials 2019, 12, 1002.

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