Magnetic recording and reproducing device including a differential read head
US8270122B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2009 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | Jun 28, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/3996
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording read head is provided capable of achieving high reproduction output, resolution, and SNR, even at a high linear density. There is also provided a magnetic recording and reproducing device capable of achieving sufficient error bit rate. The magnetic recording read head includes a differential read head and a write head. The differential read head has a multilayer structure formed by laminating a first magnetoresistive sensor having a first free layer, a differential gap layer, and a second magnetoresistive sensor having a second free layer. Outside the multilayer structure, a pair of electrodes and a pair of magnetic shields are provided respectively. A ratio (Gl/bl) of an inside distance (Gl) between the first and second free layers to a bit length (bl) is set to 0.6 or more and 1.6 or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.