Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of biasing or erasing
Reexamination Certificate
2007-10-09
2007-10-09
Wong, K. (Department: 2627)
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of biasing or erasing
C360S075000, C360S077120
Reexamination Certificate
active
11633149
ABSTRACT:
After a DC erasing is performed in a direction by permanent magnets on a servo signal recording part, servo signals are recorded in the signal recording area of the servo signal recording part by a magnetic field in the direction opposite to that of the DC erasing. Thus, in a recording method for a magnetic recording medium having a data signal recording part and the servo signal recording part on a magnetic layer, accurate servo signals can be recorded and reproduced even on the medium having the magnetic layer of 0.13 μm or smaller.
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Abe Takashi
Miyata Kiyoyuki
Takano Masanori
Takasu Nobufumi
Watanabe Yoshiyuki
Depke Robert J.
Rockey, Depke & Lyons LLC.
Sony Corporation
Wong K.
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