Magnetic disk drive recording a signal with a skew angle
US5995341A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1998 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Oct 13, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0029
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic disk drive has a magnetic head for recording or reproducing information on or from a magnetic recording medium. The magnetic recording medium includes a magnetic recording layer for information recording which has magnetic anisotropy in a direction perpendicular to a surface of the recording medium, a soft magnetic under layer under the magnetic recording layer and having soft magnetic properties, and a non-magnetic substrate. The magnetic disk drive records a signal with a skew angle on at least some tracks. A main pole has a size satisfying pL<(tP-tW cos .theta.)/sin .theta., where pL is a width of an end face of the main pole in a traveling direction, tW is a track width of the end face of the main pole, tP is a track pitch, and .theta. is a skew angle of a trailing edge of the main pole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.