Magnetic field sensor with a plurality of magnetoresistive thin-film layers having an end at a common surface
US6340886B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1997 |
| Grant date | Jan 22, 2002 |
| Priority date | — |
| Expiry date | Aug 8, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/3996
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic field sensing structure for sensing magnetic field changes provided therein having a pair of pole structures with a gap space between them that each include permeable material and end in substantially a common surface. A plurality of field sensing structures is positioned successively in the gap space to be supported between the pole structures with each having an end thereof substantially the common surface. These sensing structures are formed of a plurality of magnetoresistive, anisotropic, ferromagnetic thin-film layers at least two of which are separated from one another by a nonmagnetic, electrically conductive layer positioned between them. They are electrically connected to one another adjacent the common surface, and may be electrically connected to one of the pole structures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.