Method for biasing magnetoresistive sensor with decoupled hard bias multilayers
US7072156B2 · kind B2 · utility
11Cited by
6References
7Claims
0Family size
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Key dates
| Filing date | Feb 18, 2004 |
| Grant date | Jul 4, 2006 |
| Priority date | — |
| Expiry date | Mar 16, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3903
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic sensor is provided, having two bias layers separated by a decoupling layer to eliminate exchange coupling between the bias layers. The two bias layers may have differing coercivities, such that the biases provided by the bias layers to the free layer are independently adjustable. The grain structures of the two bias layers may be substantially decorrelated by the decoupling layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.