Substrate for a magnetic recording medium, the magnetic recording medium, and a method of producing the same
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United States of America Patent
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Aug 1, 2000
Grant Date -
N/A
app pub date -
Apr 24, 1998
filing date -
Apr 25, 1997
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Abstract
A non-ferromagnetic metal thin film is formed on a non-ferromagnetic substrate such as a glass substrate. A target principally containing an intermetallic compound is sputtered to form a fine structure having discrete bumps provided on the surface of the substrate. In addition, ring bumps different from the bumps of the intermetallic compound are formed on a contact start/stop zone by a laser or other means, thus completing a magnetic recording medium.
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