Magnetic field sensor device
US9903920B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2014 |
| Grant date | Feb 27, 2018 |
| Priority date | — |
| Expiry date | Aug 2, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/0011
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic field sensor apparatus is provided for measuring one magnetic field vector component He. The apparatus includes at least one anisotropic magneto-resistive resistor device (AMR resistor device) on a chip substrate, where the resistor device includes a plurality of magneto-resistive AMR resistor elements which are connected in series by electrically conductive strips. At least one permanent-magnetic magnetization element with a magnetization axis is assigned to each resistor element in such a way that the resistor element is passed through by an initial magnetization field H0 of the magnetization element in the direction of the magnetization axis. A measurement current IS flowing through the resistor element from a contact region between a first conductive strip and the resistor element to a contact region between the resistor element and a second conductive strip has a mean current direction axis at a predefined linearization angle α>0° and α<90° relative to the magnetization axis. A highly sensitive magnetic field sensor apparatus can be manufactured economically in large numbers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.