Magnetic head for perpendicular magnetic recording having a main pole and a shield
US8503130B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 24, 2012 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Jul 24, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/315
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic head includes first and second coils, a main pole, a write shield, first and second yoke layers, and first and second coupling parts. The first and second yoke layers are magnetically connected to the write shield. The first yoke layer is located on the leading side relative to the main pole, whereas the second yoke layer is located on the trailing side relative to the main pole. The first coupling part magnetically couples the main pole and the second yoke layer to each other. The second coupling part magnetically couples the first yoke layer and the second yoke layer to each other. The first coil is wound around the first coupling part, whereas the second coil is wound around the second coupling part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.