Magneto-resistive effect element with recessed antiferromagnetic layer
US9514771B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2015 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | Mar 30, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/3996
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magneto-resistive effect element has a first shield layer, a second layer, and a multilayer film that is positioned between the first shield layer and the second shield layer. The multilayer film has a free layer, a first pinned layer, a nonmagnetic spacer layer, a second pinned layer that fixes a magnetization direction of the first pinned layer, and an antiferromagnetic layer that is exchange-coupled with the second pinned layer. The antiferromagnetic layer is positioned away from an air bearing surface (ABS). The second pinned layer has a first part that is positioned away from the ABS, and a second part that makes contact with the first part, and that extends to the ABS parallel to the first pinned layer; and the first part has a first layer that makes contact with the antiferromagnetic layer, a second layer that makes contact with the second part, and a layer that is positioned between the first layer and the second layer, and that exchange-couples the first layer and the second layer in an anti-parallel orientation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.