Magnetoresistive sensor, including non-magnetic conducting layer embedded in shielding layer and magnetic head, head gimbal assembly and disk drive unit with the same
US8582248B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 6, 2011 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Jan 19, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/3996
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A MR sensor comprises a first shielding layer, a second shielding layer, a MR element and a pair of hard magnet layers sandwiched therebetween, and a non-magnetic insulating layer formed at a side of the MR element far from an air bearing surface of a slider. The MR sensor further comprises a first non-magnetic conducting layer formed between the first shielding layer and the MR element, and the first non-magnetic conducting layer is embedded in the first shielding layer and kept separate from the ABS. The MR sensor of the invention can obtain a narrower read gap to increase the resolution power and improve the reading performance, and obtain a strong longitudinal bias field to stabilize the MR sensor so as to increase the total sensor area and, in turn, get an improved reliability and performance. The present invention also discloses a magnetic head, a HGA and a disk drive unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.