Method and apparatus for magnetic transfer

A method for magnetic transfer by bringing a master carrier for magnetic transfer closely together with a slave medium and by applying magnetic field for transfer, said master carrier having a magnetic layer formed 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:

• applying a magnetic field in track direction on the surface of the slave medium,
• arranging permanent magnets each having magnetic field symmetrical to the axis of the magnetic pole with the axis of the magnetic pole running perpendicularly to the surface of a collective unit comprising the master carrier and the slave medium and with the same polarities facing to each other after initial DC magnetization has been performed in advance on the slave medium;
• arranging two pairs of said permanent magnets at adjacent positions so that the adjacent magnets have the poles with the opposite polarities adjacent to each other;
• rotating said two pairs of permanent magnets or the collective unit of said master carrier for magnetic transfer and said slave medium in track direction;
• and
• performing magnetic transfer by applying magnetic field for transfer in track direction reverse to the direction of the initial DC magnetization.

An apparatus for magnetic transfer for applying a magnetic field for transfer by bringing a master carrier for magnetic transfer and a slave medium closely together and by applying magnetic field for transfer, said master carrier having a magnetic layer formed 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 apparatus comprising initial DC magnetizing means for performing initial DC magnetization of the slave medium in track direction in advance, for arranging a pair of permanent magnets each having magnetic field symmetrical to the axis of the magnetic pole with the axis of the magnetic pole running perpendicularly to the surface of the slave medium, with the same polarities facing to each other and with the slave medium interposed between, for disposing two pairs of said permanent magnets at adjacent positions with the poles of the opposite polarities adjacent to each other, for rotating said slave medium or said two pairs of permanent magnets in track direction, and for applying magnetic field in track direction on the surface of the slave medium, combining means for combining said master carrier for magnetic transfer with the slave medium processed by said initial DC magnetization, and transfer magnetic field applying means for applying magnetic field for transfer in track direction reverse to the direction of the initial DC magnetization on the surface of the slave medium.

An apparatus for magnetic transfer for applying magnetic field for transfer by bringing a master carrier for magnetic transfer and a slave medium closely together and by applying magnetic field for transfer, said master carrier having a magnetic layer formed 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 apparatus comprising initial DC magnetizing means for performing initial DC magnetization on the slave medium in track direction in advance by applying magnetic field in track direction on the surface of the slave medium, combing means for combining said master carrier for magnetic transfer with the slave medium processed by said initial DC magnetization, and magnetic transfer means for arranging a pair of permanent magnets each having magnetic field symmetrical to the axis of the magnetic pole with the axis of the magnetic pole running perpendicularly to the surface of the slave medium, with the same polarities facing to each other and with the slave medium interposed between, for disposing two pairs of said permanent magnets at adjacent positions with the poles of the opposite polarities adjacent to each other, for rotating said slave medium or said two pairs of permanent magnets in track direction, and for applying a magnetic field for transfer in track direction reverse to the direction of the initial DC magnetization.