GMR head, method for its manufacture, and magnetic disc drive utilizing the head
US6327121A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1998 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Nov 13, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/934
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention provides a GMR head in which an adequate bias point may be set for the free magnetic layer 12 of the GMR head by suppressing the static magnetic field in the free magnetic layer which arises from a pinned magnetic layer 14 of the GMR head. The GMR head comprises a sensor section 10, a magnetic field correction section 20 disposed laterally adjacent to the sensor section 10. The sensor section 10 includes, in addition to the free magnetic layer 12 and the pinned magnetic layer 14, an intermediate layer 13 and an anti-ferromagnetic layer 15 in a specific arrangement. The magnetic field correction section 20 may have the same structure as the sensor section 10. Because the sensor section 10 and the magnetic field correction section 20 are provided independently and disposed laterally adjacent to each other in the direction of height of the GMR head, the magnetic field emerging from the pinned magnetic layer 14 into the free magnetic layer 12 is suppressed by the magnetic field correction section 20. The magnetic field correction section 20 may be easily formed together and simultaneously with the sensor section 10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.