Disk device
US11094342B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 2, 2020 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | Jul 2, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
According to one embodiment, in a disk device, a first pattern cut out from a burst region at a certain servo track by a first length and with a first start position, does not match a second pattern cut out from the burst region at an adjacent servo track by the first length and with an arbitrary second start position including first timing. The burst region at the servo tracks includes a first burst pattern including a first magnetized portion where a first value is recorded and a second magnetized portion where a second value reverse to the first value in polarity is recorded, the second magnetized portion being adjacent to the first magnetized portion in a down track direction. A width of the first magnetized portion in the down track direction and a width of the second magnetized portion in the down track direction are different from each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.