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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsTatsuaki Ishida, Keizo Miyata, Nobuyuki Komura, Yasuaki Ban, Taizuo Hamada, Hideyuki Hashi
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A master information carrier capable of manufacturing a magnetic recording medium in which a preformat recording of information signals causing no reproduction signal detection errors arising from a pulse shift of a reproduction waveform is performed. A master information carrier 1 has an array of ferromagnetic thin films 3 arranged according to the pattern of information signals and is used for forming magnetization 4 of a pattern corresponding to the array pattern of the ferromagnetic thin film 3 in a magnetic recording medium by applying a magnetic field while opposing the master information carrier 1 against a magnetic recording medium 2. Each of the ferromagnetic thin films 3 is formed such that each pattern length A becomes equal to a length including a correction amount α in addition to a length a between magnetic transition areas 6 of the magnetization 4 to be formed in the magnetic recording medium 2.
A master information carrier comprising an array of ferromagnetic films formed on a base surface according to information signals, the master information carrier being used for forming a magnetized pattern corresponding to the array of the ferromagnetic films in an in-plane magnetic recording medium through application of a magnetic field with the master information carrier opposing the in-plane magnetic recording medium,
A master information carrier comprising an array of ferromagnetic films formed on a base surface according to information signals, the master information carrier being used for forming a magnetized pattern corresponding to the array of the ferromagnetic films in an in-plane magnetic recording medium through application of a magnetic field with the master information carrier opposing the in-plane magnetic recording medium,
A method for manufacturing a magnetic recording medium comprising the steps of applying a magnetic field while opposing a master information carrier provided with an array of ferromagnetic films formed according to information signals on a base surface against a surface of a vertical magnetic recording medium and thus performing a preformat recording of a magnetized pattern corresponding to the array of the ferromagnetic films for a magnetic layer in the vertical magnetic recording medium,
Dependencies are inferred from the claim text.