Appeal No. 2003-1801
Application 09/559,347
The subject matter on appeal relates to a longitudinal
or perpendicular magnetic recording medium comprising a glass or
glass-ceramic substrate comprising lithium, a sealing layer
comprising substantially amorphous NiNb directly deposited on the
substrate and a magnetic layer, wherein the sealing layer has a
thickness of about 450D or less and substantially prevents
migration of lithium from the substrate to the magnetic layer.
The appealed subject matter also relates to a method of
manufacturing such a magnetic recording medium. This appealed
subject matter is adequately illustrated by independent claim 21,
which reads as follows:
21. A longitudinal or perpendicular magnetic recording
medium comprising, in this order:
a glass or glass-ceramic substrate comprising Li:
a sealing layer comprising substantially amorphous NiNb
directly deposited on the glass or glass-ceramic substrate; and
a magnetic layer,
wherein the sealing layer has a thickness of about
450D or less and substantially prevents migration of Li from the
substrate to the magnetic layer of the magnetic recording medium.
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