Magnetic recording medium
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United States of America Patent
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Issued Date -
Jun 12, 2003
app pub date -
Sep 26, 2002
filing date -
Sep 28, 2001
priority date (Note) -
Abandoned
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Abstract
In a magnetic recording medium including a substrate (1) having a principal surface on which first and second magnetic layers (5 and 7) and a spacer layer (6) are at least formed, each of the first and the second magnetic layers being of a ferromagnetic material, the spacer layer being formed between the first and the second magnetic layers for inducing antiferromagnetic exchange interaction between the first and the second magnetic layers, the principal surface of the substrate is provided with concentric textures to have a predetermined surface roughness so that the spacer layer has a uniform thickness. The first magnetic layer is for controlling the antiferromagnetic exchange interaction.
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