Journal
MICROMACHINES
Volume 13, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/mi13020235
Keywords
integrated position detection; micro positioning; MEMS; Hall sensor; micromagnets
Categories
Funding
- German Federal Ministry of Education and Research (BMBF) [16FMD01K, 16FMD02, 16FMD03]
- German Research Foundation (DFG) through the collaborative Research Center [CRC1261]
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This paper demonstrates a fully integrable magnetic microposition detection for miniaturized systems. By combining Hall sensors with a novel kind of wafer-level integrable micromagnet, the system achieves high precision measurements in both 1D and 3D space.
A fully integrable magnetic microposition detection for miniaturized systems like MEMS devices is demonstrated. Whereas current magnetic solutions are based on the use of hybrid mounted magnets, here a combination of Hall sensors with a novel kind of wafer-level integrable micromagnet is presented. 1D measurements achieve a precision <10 mu m within a distance of 1000 mu m. Three-dimensional (3D) measurements demonstrate the resolution of complex trajectories in a millimeter-sized space with precision better than 50 mu m in real time. The demonstrated combination of a CMOS Hall sensor and wafer-level embedded micromagnets enables a fully integrable magnetic position detection for microdevices such as scanners, switches, valves and flow regulators, endoscopes or tactile sensors.
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