Magnetoresistive device and method having improved Barkhausen noise suppression
US5485334A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1996 |
| Grant date | Jan 16, 1996 |
| Priority date | — |
| Expiry date | Feb 22, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49046
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved magnetoresistive device and method for fabricating the same which results in improved Barkhausen noise suppression. A generally coplanar device is described having an MR structure conductive region longitudinally biased by opposing permanent magnet layers separated therefrom by a non-magnetic metal or dielectric separation layer. significant reduction of the demagnetization energy near the MR-to-permanent magnet junction is achieved, particularly in the use of an elliptically shaped conductive region and the resultant generally coplanar device is readily fabricated and reproducible using a self-aligning process. The longitudinal bias technique described can be used in conjunction with all known transverse bias techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.