AF-coupled dual side shield reader with AF-coupled USL
US9190081B2 · kind B2 · utility
2Cited by
17References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2014 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | Feb 28, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/398
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The embodiments disclosed generally relate to a read head sensor in a magnetic recording head. The read head sensor comprises side shields in addition to the upper and lower shields. The upper shield sensor is a multilayer structure with antiferromagnetic coupling. The side shield is a multilayer structure whereby a lower magnetic layer is separated from an upper magnetic layer. The upper magnetic layer is ferromagnetically coupled to a bottom layer of the upper shield. The bias direction of the read head sensor is antiparallel to the bottom layer of the upper shield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.