Master disk for transferring magnetic pattern and magnetic recording medium
AssigneeFujitsu Limited
InventorsYutaka Nakamura, Hitoshi Komoriya, Hiroyuki Suzuki, Takao Hirahara
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Abstract
The present invention provides a master disk that can easily be brought into contact with and separated from a magnetic recording medium, and can accommodate foreign matters. This master disk transfers a predetermined magnetic pattern onto a magnetic recording medium that can record magnetic information. In the master disk, there are a magnetic pattern formation region in which the magnetic pattern is formed, and a blank region in which the magnetic pattern is not formed. A concave portion for accommodating foreign matters is formed in at least one part of the blank region.
Claims6
A magnetic-pattern transfer master disk for transferring a predetermined magnetic pattern onto a magnetic recording medium that can record magnetic information, said master disk comprising:
- a magnetic pattern region in which the magnetic pattern is formed;
- and
- a blank region in which the magnetic pattern is not formed,
- wherein a concave portion is formed in at least one part of the blank region.
A magnetic recording medium that has a magnetic pattern transferred thereto by a magnetic-pattern transfer master disk having a magnetic pattern region in which the magnetic pattern is formed and a blank region in which the magnetic pattern is not formed, with a concave portion being formed in at least one part of the blank region.
Dependencies are inferred from the claim text.