Perpendicular magnetic recording media
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United States of America Patent
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Mar 31, 2009
Grant Date -
Oct 13, 2005
app pub date -
Jun 9, 2005
filing date -
Aug 26, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A perpendicular magnetic recording medium includes an intermediate film formed of a plurality of layers between a soft magnetic film and a perpendicular magnetization film. The intermediate film includes at least two layers, i.e., an oxygen-containing layer, or a nonmetallic element-containing layer containing nitrogen, silicon or carbon, and a metallic layer formed on a surface side of the oxygen-containing layer or the nonmetallic element-containing layer. The metallic layer includes a plurality of isolated island-shaped structures. Crystal grains of the perpendicular magnetization film are formed so as to correspond to the isolated island-shaped structures. As a result, a high recording density is obtained.
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