Tohoku University Technology: Magnetic field detection with a single planar element: T21-257
Contributing to miniaturization of 3D magnetic field sensors for IoT applications
Magnetic field sensors are used in a variety of applications such as contactless current detection and electronic compasses, etc. Because an ordinary magnetic element detects only magnetic field components in a specific direction, detecting the direction of a magnetic field vector in 3D space requires a 3D combination of elements corresponding to each direction. This is an issue to device miniaturization and integration, which are rapidly increasing in demand in the IoT field. This technology relates to the invention of a planar magnetic field sensor that does not require a 3D structure. The direction of the magnetic field vector in 3D space is determined from the voltage generated in each part of the ferromagnetic Fe-Sn thin films[1]. A 3D magnetic field sensor can be fabricated by patterning a single magneto-sensitive layer by a general-purpose device processing method. In addition to magnetic field sensors, this thin film can be expected to create new applications by combining functions[2-5].
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The revenue generated from technology transfer is reinvested as new research funding for universities and researchers, and is utilized to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will vigorously promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by signing basic technology transfer agreements with the following universities (as of June 1, 2025): Tohoku University, Hirosaki University, Iwate University, Akita University, Fukushima University, Yamagata University, Tohoku Gakuin University, Iwate Medical University, Fukushima Medical University, Aizu University, Miyagi University, Hokkaido University, Muroran Institute of Technology, and Showa Medical University.
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