Modified InAs Hall Elements
Patent Application, Filed 13 Jan 2000
DEPARTMENT OF THE NAVY WASHINGTON DC
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This invention pertains to a Hall element electronic device with an InAs channel which has high sensitivity and enhanced stability over a large temperature range and which can sense electrical and magnetic fields. Description of Related Art Hall elements using III-V semiconductor materials have widespread use for a variety of military and commercial applications. They are mostly commonly used as magnetic field sensors in small DC brushless motors found in electronic consumer equipment such as video cassette recorders, personal computers, and compact disk drives. They also are used for position, tilt-level, pressure and thickness sensing as well as in tachometers, compasses, magnetizers, and electronic measurement equipment used to detect current, voltage, power, frequency, and magnetic field. They are also used in the non-destructive evaluation of materials to detect hair line cracks in metals for such applications as wing and fuselage inspection. In 1995, approximately one billion Hall sensors were manufactured worldwide. The market for such sensors is growing rapidly, and many new applications for the contactless sensors are expected in the future because they can detect static as well as variable magnetic and electric fields.
- Electrical and Electronic Equipment