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Hall sensors for extreme temperatures.
Jakub Jankowski1, Semir El-Ahmar, Maciej Oszwaldowski
1Institute of Physics, Poznan University of Technology, Nieszawska 13a, 61-965 Poznan, Poland. jakub.jankowski@doctorate.put.poznan.pl
Sensors (Basel, Switzerland)
|February 21, 2012
Summary
We developed the first complete extreme temperature Hall sensor, operational from -270°C to +300°C. This magnetic sensor utilizes an Indium Antimonide (InSb) layer for reliable performance in demanding environments.
Area of Science:
- Materials Science
- Semiconductor Physics
- Sensor Technology
Background:
- Traditional Hall sensors have limited operating temperature ranges.
- Extreme environments require robust magnetic sensing solutions.
- Existing technologies struggle with performance stability at very low and high temperatures.
Purpose of the Study:
- To develop and characterize the first complete extreme temperature Hall sensor.
- To enable magnetic field measurements in environments with temperatures ranging from -270°C to +300°C.
- To provide a reliable sensor for automotive, aerospace, military, and oil/gas applications.
Main Methods:
- Fabrication of an extreme-temperature packaged Hall sensor.
- Epitaxial growth of a heavily n-doped Indium Antimonide (InSb) layer on Gallium Arsenide (GaAs).
- Characterization of the sensor's magnetic sensitivity and temperature coefficient.
Main Results:
- The developed Hall sensor operates across an unprecedented temperature range of -270°C to +300°C.
- The sensor exhibits a magnetic sensitivity of approximately 100 mV/T.
- A low temperature coefficient of less than 0.04 %/K was achieved.
Conclusions:
- The first complete extreme temperature Hall sensor has been successfully prepared.
- The sensor demonstrates high performance and stability across a wide thermal spectrum.
- This technology offers significant potential for applications in extreme environments across multiple industries.
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