Method for manufacturing magnetic tape with servo signal written therein, magnetic tape with servo signal written therein, and servo writer

摘要

To manufacture a perpendicular magnetic recording-type magnetic tape having a servo signal written therein by a write head having a magnetic gap, a perpendicular direct-current erasing step in which a magnetic tape is magnetized in one direction that is one of two opposite thickness directions of the magnetic tape is performed before a signal writing step in which a servo signal is written in the magnetic tape by outputting a pulsed signal to the write head.