Magnetic head for perpendicular magnetic recording including a stopper layer for suppressing protrusion of the front end face of a shield
US7933095B2 · kind B2 · utility
4Cited by
6References
24Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 4, 2007 |
| Grant date | Apr 26, 2011 |
| Priority date | — |
| Expiry date | Feb 1, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3163
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic head includes a pole layer and a shield. The shield includes a shield layer having a front end face located in the medium facing surface at a position forward of an end face of the pole layer along a direction of travel of the recording medium. The magnetic head further includes a stopper layer for suppressing protrusion of the front end face of the shield layer, the stopper layer being disposed adjacent to the shield layer and made of a nonmagnetic material having a linear thermal expansion coefficient of 5×10−6/° C. or smaller at a temperature of 25° C. to 100° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.