Magnetic thin film medium comprising amorphous sealing layer for reduced lithium migration
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United States of America Patent
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Sep 19, 2000
Grant Date -
N/A
app pub date -
Nov 5, 1998
filing date -
Dec 12, 1997
priority date (Note) -
Expired
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Abstract
A glass or glass-ceramic substrate comprising about 0.5 to about 32 wt. % Li.sub.2 O is employed as a non-magnetic substrate of a magnetic recording medium. Migration of Li from the substrate to the medium's surface is prevented by forming an amorphous NiP sealing layer on the substrate, with an optional adhesion enhancement layer therebetween. Embodiments include surface oxidizing the amorphous NiP sealing layer for enhanced recording performance.
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