Patent ID: 6643079
Filing Date: 2003-11-04
Classification: G11B

Abstract:
A method for magnetic transfer by bringing a master carrier for magnetic transfer with a slave medium and by applying magnetic field for transfer, said master carrier having a magnetic layer on surface of a substrate corresponding to an information signal, and said slave medium comprising a magnetic recording medium where the information is to be transferred, said method comprising the steps of:arranging permanent magnets each having magnetic field symmetrical to the axis of the magnetic pole at least on one of upper or lower surfaces of the slave medium with the axis of the magnetic pole disposed in parallel to the surface of the slave medium; rotating the slave medium or the permanent magnet in track direction; performing initial DC magnetization on the slave medium in advance in track direction, and bringing the master carrier for magnetic transfer closely together with the slave medium processed by said initial DC magnetization; and performing magnetic transfer by applying magnetic field for transfer in track direction reverse to the direction of the initial DC magnetization on the surface of the slave medium, wherein, when said permanent magnets each having magnetic field symmetrical to the axis of the magnetic pole are arranged at least on one of upper or lower surfaces of the slave medium with the axis of the magnetic pole running in parallel to the surface of the slave medium, the magnetic field intensity distribution in track direction of the magnetic field generated is such that magnetic field intensity higher than the coercive force Hcs of the slave medium is present only in one direction on a position in track direction, and the magnetic field intensity in reverse direction is lower than the coercive force Hcs of the slave medium at any position in any track direction.