Patent ID: 8462453

Claim:
A magnetic transfer method, comprising: applying to a contact body a magnetic field, wherein the contact body includes a master disk having a magnetic pattern corresponding to preformatted signals, and a magnetic recording medium in close contact with the master disk, the magnetic recording medium being a disk, an outer peripheral radius of a transfer region of the magnetic recording medium being designated ‘Ro’ and an inner peripheral radius of the transfer region being designated ‘Ri’; generating the applied magnetic field by a plurality of pairs of magnetic field generating units, the total number of pairs being designated ‘N’, wherein each adjacent pair of magnetic field generating units of the plurality of pairs is disposed at equal angles centered on a center of rotation of the contact body, and each magnetic field generating unit has a length equal to or greater than (Ro−Ri)/N and less than (Ro−Ri) in the radial direction of the magnetic recording medium; rotating the contact body during the application of the magnetic field; and while the contact body is rotating, moving the plurality of magnetic field generating units parallel to a surface of the contact body, wherein each pair of magnetic field generating units of the plurality moves in radial synchrony with all other pairs of the plurality, each pair of magnetic field generating units moves along a line disposed from the center of rotation of the contact body to the outer periphery of the contact body, and each pair of magnetic field generating units traverses a distance equal to or greater than (Ro−Ri) from a first peripheral side to a second peripheral side of the magnetic recording medium during a time interval in which the contact body rotates at most 360 degrees; whereby the preformatted signals are transferred from the master disk to the magnetic recording medium.