Dresden 2020 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 24: Materials for Sensors and Actuators
MM 24.3: Talk
Tuesday, March 17, 2020, 12:15–12:30, IFW B
High compliancy for printed magnetic field sensors — •Minjeong Ha1, Gilbert Santiago Cañón Bermúdez1, Tobias Kosub1, Yevhen Zabila2, Rico Illing1, Yakun Wang1, Jürgen Fassbender1, and Denys Makarov1 — 1Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany — 2The H. Niewodniczanski Institute of Nuclear Physics, Krakow, Poland
The development of highly-compliant and skin-conformal magnetic sensors is essential for the human-interactive electronics capable of position recognition and tracking motion. To design such human interactive sensing devices, printing technique is a great approach due to easily tunable and shapable process, cost-effectiveness, and large-area fabrication. Here we report printable magnetoresistive sensors on ultra-thin films that can naturally comply with the skin. Thanks to the new formulation of the paste, the printed magnetic microflakes could firmly attach to any even ultrathin polymeric substrate showing mechanical stability under 16 um bending radius without any damage. The excellent percolation contacts between the randomly distributed microflakes attribute the high sensitivity of 2.2/T in low magnetic field ranges of 1 mT on the bending curvature of 500 um, resulting in 1900 times higher figure of merits than current state-of-the-art printable magnetic sensors. With this performance, our printed sensors on skin demonstrate a touchless control of virtual objects for the practical application in human-interactive wearable devices, artificial prosthetics, robotics, and internet of things.