Servotrack writing system using dual laser scales for high track-per-inch recording

Author

Nakayama, Akihito ; Kawabata, Yasuo ; Takenaka, Takuya ; Goto, Kazuo ; Ota, Toshiro ; Okazaki, Yutaka

Author_Institution

Core Technol. Dev. Group, Sony Corp., Tokyo, Japan

Volume

40

Issue

4

fYear

2004

fDate

7/1/2004 12:00:00 AM

Firstpage

3123

Lastpage

3126

Abstract

A servotrack writing (STW) system using dual laser scales (DLSs) has been developed. Two very small and lightweight laser scales are mounted on both the head arm and spindle motor, respectively, detecting the arm position and clock signal by the grating interferometer head. DLS-STW is a drive-level servotrack writer that eliminates the need for a clean room. A 5-nm step VCM control has been achieved by using a mechanically improved prototype small hard disk drive.

Keywords

disc drives; hard discs; laser beam applications; magnetic recording; servomechanisms; VCM control; arm position detection; clock signal; drive-level servotrack writer; dual laser scales; grating interferometer head; hard disk drive; high track-per-inch recording; servotrack writing; spindle motor; Clocks; Costs; Disk recording; Hard disks; Magnetic heads; Phase locked loops; Prototypes; Signal resolution; Timing; Writing; Grating interferometer head; HDD; hard disk drive; laser scale; servotrack writing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.828983

Filename

1325753