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US Patent 7604880 Information recording medium

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Is a
Patent
Patent

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
7604880
Patent Inventor Names
Yoshikazu Soeno1
Kazuya Shimakawa1
Mitsuru Takai1
Takahiro Suwa1
Katsumichi Tagami1
Date of Patent
October 20, 2009
Patent Application Number
11085522
Date Filed
March 22, 2005
Patent Primary Examiner
‌
Kevin M Bernatz
Patent abstract

In an information recording medium where respective concave parts of a magnetic layer, which is formed on at least one side e of a substrate and in which a predetermined convex/concave pattern has been formed, are filled with non-magnetic material and non-magnetic layers are formed by the non-magnetic material in at least partial regions of respective upper surfaces of respective convex parts of the magnetic layer, the non-magnetic layers are formed so that parts thereof protrude further in a direction in which the convex parts protrude than other parts of the non-magnetic layers.

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