Title :
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
fDate :
7/1/2004 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2004.828983
