Spin valve head, production process thereof and magnetic disk device
US6483674B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2000 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Feb 8, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3163
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A spin valve head comprises a spin valve film comprising a regular antiferromagnetic layer, a pinned magnetic layer, an intermediate layer and a free magnetic layer; a pair of electrodes arranged at both ends of the spin valve film; and a pair of exchange bias magnetic field impressing layers arranged at both ends of the free magnetic layer of the spin valve film, wherein the exchange bias magnetic field impressing layers are made of antiferromagnetic material, and the spin valve film extends over the exchange bias magnetic field impressing layers. The spin valve head is characterized in that the abutted junction region is extended so that the occurrence of Barkhausen noise can be more effectively suppressed; and the abutted junction region is stably formed without being affected by the film formation process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.