US 2002/0171958 A1 · Magnetic transfer method and apparatus

Abstract

A favorable magnetic transfer is performed on a perpendicular magnetic recording medium. A permanent magnet apparatus provided with two permanent magnets, each having a width extending the length of the radial direction of a discoid magnetic recording medium, is used as a transfer magnetic field generating means. A conjoined body formed of the perpendicular magnetic recording medium, which has been initially magnetized unidirectionally in the direction perpendicular to the track surface thereof, and two master mediums, disposed on respective surfaces of the slave medium, is inserted between the permanent magnets. A rotating means rotates the conjoined body, in the direction along the tracks of the slave medium, while a transfer magnetic field is applied to the conjoined body in the direction substantially opposite that in which the initial magnetization of the magnetic layer of magnetic recording medium has been performed, so as to perform the magnetic transfer.

Claims17

Dependent claims

A magnetic transfer method comprising the steps of:

conjoining the magnetic layer, which has been formed in a pattern for transferring data to the magnetic layer of a slave medium, of a master medium with the magnetic layer of the slave medium to form a conjoined body, and applying a transfer magnetic field to the respective magnetic layers of the conjoined master medium and slave medium to magnetically transfer the data to the magnetic layer of the slave medium, wherein
said slave medium is a perpendicular magnetic recording medium, and after the magnetic layer of said slave medium has been subjected to an initial magnetization process consisting of applying an initial direct current magnetic field to said magnetic layer unidirectionally in a direction perpendicular to the track direction thereof to initially magnetize said magnetic layer,
the magnetic layer of said slave medium and the magnetic layer of the master medium are conjoined and a transfer magnetic field is applied to the respective magnetic layers thereof in the direction opposite that in which the initial direct current magnetization has been performed.

Dependencies are inferred from the claim text.

Magnetic transfer method and apparatus

Life of this patent

Magnetic transfer method and apparatus

Life of this patent

Abstract

Claims17