Magnetic detecting device and method for manufacturing the same
US8198886B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2008 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | Mar 7, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4902
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic detecting device includes a first and a second magnetoresistive element, and a first and a second fixed resistor connected in series to the first and the second magnetoresistive element, respectively. The first and the second magnetoresistive element each include a pinned magnetic layer and a free magnetic layer with a nonmagnetic conductive layer in between. The first and the second magnetoresistive element have the same layer structure except that the nonmagnetic conductive layers have different thicknesses. The thicknesses of the nonmagnetic conductive layers are set so that a positive interlayer coupling magnetic field acts between the free magnetic layer and the pinned magnetic layer of the first magnetoresistive element and a negative interlayer coupling magnetic field acts between the free magnetic layer and the pinned magnetic layer of the second magnetoresistive element. The first and the second fixed resistor have the same layer structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.