Patent · US Active

Disk drive self servo writing spiral tracks by propagating bursts

US7688539B1 · kind B1 · utility

110Cited by

52References

22Claims

0Family size

Assignee

Western Digital Technologies, Inc. · US

Inventors

Lawrence M. Bryant · Palo Alto, US
Yakov M. Lifchits · San Jose, US
Siri S. Weerasooriya · Campbell, US

Key dates

Filing date	May 14, 2008
Grant date	Mar 30, 2010
Priority date	—
Expiry date	May 14, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG11B5/59666
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A disk drive is disclosed comprising a disk, and a head actuated over the disk. The head is positioned at a radial location over the disk, and a servo burst is written at the current radial location. The servo burst is read to generate a read signal, and the read signal is processed to generate a position error signal (PES). The head is moved radially in response to the PES, and the process is repeated multiple times to form a spiral track spanning at least one revolution of the disk.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.