Magnetic head for perpendicular magnetic recording and method of manufacturing same
US7375925B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 2005 |
| Grant date | May 20, 2008 |
| Priority date | — |
| Expiry date | Nov 18, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3169
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pole layer incorporates: a first portion having an end face located in a medium facing surface; and a second portion having a thickness greater than that of the first portion. A surface of the first portion closer to a substrate is located farther from the substrate than a surface of the second portion closer to the substrate. A surface of the first portion farther from the substrate is located closer to the substrate than a surface of the second portion farther from the substrate. At least a portion of the pole layer is placed in an encasing groove formed in a region extending from a first encasing layer through a second encasing layer to a nonmagnetic metal layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.