Structure for and method of making magnetic recording media
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United States of America Patent
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Nov 18, 2003
Issued Date -
N/A
app pub date -
Apr 17, 2000
filing date -
Sep 29, 1994
priority date (Note) -
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Abstract
The present invention provides a longitudinal magnetic recording media having a substrate, optionally, a sputter deposited MgO seed layer, a Co or Co alloy based magnetic layer and an underlayer disposed between the substrate and the magnetic layer comprised of a material having a body centered cubic derivative ordered crystalline structure, preferably a B2, DO.sub.3 or L2.sub.1 structure. The material may be for example, NiAl, FeAl or Mn.sub.3 Si. A thin Cr or Cr alloy intermediate layer of about 1.0 nm to 5.0 nm thick may be positioned between the underlayer and the magnetic layer.
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