Appeal No. 2004-1144
Application No. 09/584,765
A2 lattice structure (e.g., see independent claims 18 and 48) or
as having a particular composition (e.g., see independent claim
33). This appealed subject matter is further illustrated by
independent claims 18 and 33 as well as dependent claims 41, 44
and 47 which read as follows:
18. A magnetic recording medium, comprising:
a substrate;
a seedlayer deposited on the substrate, wherein the
seedlayer includes a ternary or quaternary intermetallic alloy
with an A2 lattice structure that contacts the substrate;
a chromium or chrome alloy underlayer deposited on the
seedlayer; and
a cobalt or cobalt alloy magnetic layer deposited on the
underlayer.
33. A magnetic recording medium, comprising:
a substrate of NiP or ceramic glass;
a seedlayer deposited on the substrate, wherein the
seedlayer includes a ternary or quaternary intermetallic alloy
that contacts the substrate, the intermetallic alloy does not
contain nickel below 35 atomic percent, the intermetallic alloy
does not contain Al below 35 atomic percent, the intermetallic
alloy does not contain Al above 65 atomic percent, the
intermetallic alloy does not contain Ti above 65 atomic percent,
and the intermetallic alloy does not contain a NiAlCo ternary
alloy;
a chromium or chrome alloy underlayer deposited on the
seedlayer; and
a cobalt or cobalt alloy magnetic layer deposited on the
underlayer.
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