Demodulation of servo tracking signals printed with a lithographically patterned master disk

Author

Ishida, Tatsuaki ; Miyata, Keizo ; Komura, Nobuyuki ; Takaoka, Tetsurou

Author_Institution

HD Dev. Center, Matsushita Electr. Ind. Co. Ltd., Osaka, Japan

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

1412

Lastpage

1415

Abstract

Demodulation of the servo tracking signals magnetically printed on hard disks by using a lithographically patterned master disk has been studied. Position signal decoded from the printed servo pattern was successfully demonstrated on a spin stand. Position error evaluated in a prototype drive was 30% track pitch. Pulse timing shift control by compensating the pattern dimension, and introduction of a more sophisticated servo control system for actively controlling the printed pattern eccentricity would be key issues for further improvements

Keywords

demodulation; digital magnetic recording; disc drives; hard discs; lithography; servomechanisms; hard disks; lithographically patterned master disk; position error evaluation; position signal decoding; printed pattern eccentricity control; printed servo pattern; prototype drive; pulse timing shift control; servo control system; servo tracking signals; tracking signal demodulation; Cobalt; Control systems; Demodulation; Hard disks; Printing; Resists; Scanning electron microscopy; Servomechanisms; Substrates; Writing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.950857

Filename

950857