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US 2004/0106013 A1Published application
Master information carrier for magnetic transfer
AssigneeFuji Photo Film Co., Ltd.
InventorsKazunori Komatsu, Toshihiro Usa
Life of this patent
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Abstract
A master information carrier has a pattern of a magnetic layer representing information to be transferred to a high-density recording slave medium where the track width is not larger than 0.3 μm. The pattern is drawn by scanning a given track a plurality of times with an electron beam whose drawing diameter is smaller than the track width.
Claims4
A master information carrier having thereon a pattern of a magnetic layer representing information to be transferred to a high-density recording slave medium where the track width is not larger than 0.3 μm, wherein the improvement comprises that
- the pattern is drawn by scanning a given track a plurality of times with an electron beam whose drawing diameter is smaller than the track width.
Dependencies are inferred from the claim text.