Magnetic head for perpendicular magnetic recording having a return path section
US8482879B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 13, 2012 |
| Grant date | Jul 9, 2013 |
| Priority date | — |
| Expiry date | Dec 13, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic head includes a coil, a main pole, and a return path section. The return path section includes a plurality of magnetic path portions that separate a magnetic flux into a plurality of fluxes and allow the fluxes to pass therethrough in parallel. The coil includes a winding portion disposed around an assemblage of the plurality of magnetic path portions. In any cross section that intersects all of the plurality of magnetic path portions, the distance between two adjacent magnetic path portions is smaller than the minimum width of each of the two adjacent magnetic path portions, and only a nonmagnetic layer is present between the two adjacent magnetic path portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.