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

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

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...

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Veröffentlicht in:IEEE transactions on magnetics 2004-07, Vol.40 (4), p.3123-3126
Hauptverfasser: Nakayama, A., Kawabata, Y., Takenaka, T., Goto, K., Ota, T., Okazaki, Y.
Format: Artikel
Sprache:eng
Schlagworte:
Clocks
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Costs
Disk recording
Exact sciences and technology
Hard disks
Magnetic heads
Magnetic properties and materials
Magnetism
Phase locked loops
Physics
Prototypes
Signal resolution
Timing
Writing
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Beschreibung
Zusammenfassung: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.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2004.828983