Master information carrier for magnetic transfer
AssigneeFuji Photo Film Co., Ltd.
InventorsMasakazu Nishikawa, Kazuhiro Niitsuma, Tadashi Yasunaga, Toshihiro Usa, Kazunori Komatsu
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Abstract
A master information carrier for magnetic transfer includes a base sheet which is formed of a magnetic material. The master information carrier is provided with an irregularity pattern representing information to be transferred to a magnetic recording medium and a magnetic layer formed along the irregularity pattern. The saturation magnetization Mm of the magnetic layer and the saturation magnetization Ms of the base sheet satisfy the condition 1.0<Mm/Ms<100.
Claims8
A master information carrier for magnetic transfer comprising a base sheet which is formed of a magnetic material and is provided with an irregularity pattern representing information to be transferred to a magnetic recording medium, and a magnetic layer formed on at least on the upper surface of the protruding portion of the irregularity pattern, wherein the improvement comprises that
- the saturation magnetization Ms of the base sheet and the saturation magnetization Mm of the magnetic layer satisfy the following condition,
- 1.0<Mm/Ms<100.
Dependencies are inferred from the claim text.