Single pole magnetic recording head for perpendicular magnetic recording
US6728065B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2002 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | May 25, 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 having a first end positionable adjacent the recording medium and a second end spaced from the first end. A coil is magnetically coupled to the main magnetic pole for producing a write flux. The magnetic recording head further includes a magnetic return pole forming first and second return paths for the magnetic flux. The magnetic return pole includes first and second return poles disposed on opposite sides of, and spaced from, the main magnetic pole, and a magnetic via connecting the first and second poles and extending over the main magnetic pole forming a back shield. The main magnetic pole is isolated from the magnetic return pole by a control gap of non-magnetic material between the second end of the main magnetic pole and the magnetic via to effectively isolate the main magnetic pole from the magnetic return pole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.