Perpendicular magnetic recording head and method for manufacturing the same
US7248437B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2004 |
| Grant date | Jul 24, 2007 |
| Priority date | — |
| Expiry date | Jul 27, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/1278
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a non-magnetic material layer, a concave portion is formed above a groove G. In addition, an auxiliary magnetic pole layer is formed having a convex portion which extends in the direction toward a main magnetic pole layer and which is placed in the concave portion. Accordingly, since a magnetic flux B passing in a perpendicular magnetic recording head from the main magnetic pole layer to the auxiliary magnetic pole layer is generated, an appropriate adjustment of the intensity of a magnetic field A generated from the main magnetic pole layer can be easily performed, and the edge of a recording track on a recording medium M can be clearly defined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.