Magnetic disk drive
US6717760B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2002 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | Mar 22, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0016
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A plurality of patterns are formed beforehand so that each of those patterns is deviated slightly from another in each sector in the track width direction, then the pattern is followed up, thereby obtaining both full-track profile and micro-track profile. A variation of a position signal is detected from this profile, thereby creating a table for correcting the non-linearity error of the position signal.Consequently, the distribution of the write/read-back property is measured, thereby enabling the track density to be improved. Furthermore, a variation of the position signal caused by a property variation of the head read-back element is detected and corrected, thereby enabling a high reliability and a high track density to be realized for the object magnetic recording disk apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.