Data storage device characterizing geometry of magnetic transitions
US9361939B1 · kind B1 · utility
5Cited by
310References
34Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 31, 2014 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Mar 31, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5534
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data storage device is disclosed comprising a head and a disk comprising servo information and a reference pattern comprising a plurality of magnetic transitions. The servo information on the disk is processed to actuate the head over the disk, and a read signal is sampled from the head as the head moves across a width of the reference pattern at a substantially constant velocity to generate signal samples. The signal samples are processed to characterize a geometry of the magnetic transitions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.