Highly flexible bismuth Hall sensors on polymeric foils are fabricated, and the key optimization steps that are required to boost their sensitivity to the bulk value are identified. The sensor can be bent around the wrist or positioned on the finger to realize an interactive pointing device for wearable electronics. Furthermore, this technology is of great interest for the rapidly developing market of ­eMobility, for optimization of eMotors and magnetic bearings.

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A flexible bismuth based Hall sensor is realized with a total thickness of only 80 µm including encapsulation. After wiring the sensors have a maximum height of 280 µm and could be mounted onto curved surfaces with radii down to 5 mm without degradation of its performance. These flexible sensors allow to measure time variable magnetic fields and are applied to realize flux based control strategies for magnetically suspended systems, which is demonstrated by means of a single-axis magnetic levitation test setup.

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205 ChemInform Abstract Mebendazole (I) is hydrolyzed to produce the derivative (II). In order to verify its identity, (II) is also independently synthesized from (III) and (IV). (IR-, MS-data).