Perpendicular magnetic head and magnetic recording system having non-magnetic region in shield layer
US8305709B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2008 |
| Grant date | Nov 6, 2012 |
| Priority date | — |
| Expiry date | May 7, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/313
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A perpendicular magnetic head for writing information on a magnetic recording medium comprises an ABS, a coil for generating a magnetic flux, a magnetic pole layer, a magnetic shield layer, and a gap layer disposed between the magnetic pole layer and the magnetic shield layer. Further the magnetic head has a non-magnetic region of a non-magnetic material. The non-magnetic region is disposed in the magnetic shield layer and positioned behind the ABS at a predetermined distance. The non-magnetic region is also disposed in the magnetic shield layer and has a predetermined width. With such a configuration, an undesirable concentration of the magnetic flux on the ABS is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.