Magnetic head for perpendicular magnetic recording with encasing layer
US7663839B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2005 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Dec 30, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3169
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pole layer has: a first portion having an end face located in a medium facing surface; and a second portion that is located farther from the medium facing surface than the first portion and has a thickness greater than that of the first portion. A surface of the first portion farther from a substrate is located closer to the substrate than a surface of the second portion farther from the substrate. The second portion has a front end face that couples the surface of the first portion farther from the substrate to the surface of the second portion farther from the substrate. A shield layer has a portion located between the front end face and the medium facing surface in a region closer to the substrate than the surface of the second portion farther from the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.