Birch, Stewart, Kolasch & Birch, LLP
Servo signal recording method, servo signal recording apparatus, and magnetic recording medium
The present invention is a servo signal recording method for recording a servo signal on a magnetic tape having a data band and a servo band, wherein erasure is performed based on a pulse having a duty ratio varied so that a driving time of the AC erasing head with respect to one polarity is longer than a driving time thereof with respect to the other polarity, and then, the servo band is magnetized so as to have a magnetization direction opposite to magnetization direction caused by the erasure to record a servo signal in the servo band. According to this configuration, the influence of an information recording signal recorded on the surface of a magnetic recording medium on a reproduction output is reduced, whereby the reproduction output of a servo signal can be enhanced easily.
Hitachi Maxell, Ltd.
G
G11B
inventional
Seigi Masao Kenji
Kawarai Fujita Tanaka