Using an external spiral servo writer to write spiral tracks to a disk to facilitate writing product servo sectors to the disk
US7016134B1 · kind B1 · utility
123Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2004 |
| Grant date | Mar 21, 2006 |
| Priority date | — |
| Expiry date | Sep 21, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59661
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of writing product servo sectors to a disk of a disk drive is disclosed. An external spiral servo writer writes a plurality of spiral tracks to the disk by actuating in a closed loop system a head positioning pin inserted into the disk drive. Each spiral track comprises a high frequency signal interrupted at a predetermined interval by a sync mark. The high frequency signal and sync marks in the spiral tracks are demodulated to maintain synchronization of a servo write clock as well as maintain the head along a circular target path while writing product servo sectors to the disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.