Date of Graduation

5-2012

Document Type

Thesis

Degree Name

Bachelor of Science

Degree Level

Undergraduate

Department

Electrical Engineering

Advisor

Mantooth, H. Alan, 1963-

Abstract

In this project, we are looking to explore the characteristics of GaAs/InGaAs/AlGaAs and GaAs/AlGaAs Hall Effect sensors for use in power electronics monitoring circuitry. Hall sensors have the ability to detect the presence of magnetic fields orthogonal to the sensor surface. In order to fully understand the response of such a sensor, I performed complete micro-Hall sensor fabrication and characterization, which includes (i) fabrication of Greek cross sensors with lateral dimensions of 120 µm (ii) contact optimization (iii) sensitivity measurements (iv) noise spectra measurements. Basic studies of sensor response to high current circuit board traces were also performed on the sample. Further suggested studies include integration of magnetic field concentrators in order to focus magnetic fields on the sensor surface. Overall, continued studies of high currents, pulse response, and magnetic field concentration will lead to a better understanding of the application of these sensors to power electronics current sensing circuits.

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