Perpendicular magnetic recording head with improved write field gradient
US6813115B2 · kind B2 · utility
35Cited by
25References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2002 |
| Grant date | Nov 2, 2004 |
| Priority date | — |
| Expiry date | Nov 21, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0029
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A single pole magnetic recording head is provided according to the present invention for perpendicular magnetic recording on a recording medium. The magnetic recording head includes a main magnetic pole and a coil magnetically coupled to the main pole for magnetizing the main pole in a first magnetization direction. The magnetic recording head further includes a layer of ferromagnetic material anti-ferromagnetically coupled to the main pole such that magnetization of the ferromagnetic layer is in a second magnetization direction substantially anti-parallel to the first magnetization direction of the main pole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.