Perpendicular magnetic recording head having narrow recording gap and perpendicular magnetic recording apparatus using the same
US6707643B2 · kind B2 · utility
9Cited by
5References
15Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 14, 2001 |
| Grant date | Mar 16, 2004 |
| Priority date | — |
| Expiry date | May 2, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0029
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A perpendicular magnetic recording apparatus includes a perpendicular double-layer film medium including a stack of a soft magnetic backing layer and a perpendicular magnetic recording layer in which recording is performed under a condition that a recording track pitch as a total of a recording track width and a guard-band width between recording tracks is set to be 1 &mgr;m or less, and a perpendicular magnetic recording head including a recording main pole, an auxiliary pole disposed at a gap having a length of five or less times the guard-band width with respect to the recording main pole, and an exciting coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.