Protective overcoating for magnetic recording discs and method for forming the same
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United States of America Patent
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Mar 5, 1985
Issued Date -
N/A
app pub date -
Jun 5, 1981
filing date -
Oct 1, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A protective overcoating is disclosed for a magnetic alloy thin-film recording disc that includes a magnetic alloy film formed on a disc-shaped substrate or coated substrate. The protective overcoating is formed by first sputtering onto the magnetic medium an interfacial layer of titanium, and then sputtering onto the titanium a layer of carbon. The sputtered carbon provides wear-resisting lubricity, while the titanium interface promotes the adhesion of the sputtered carbon to the magnetic medium of the recording disc.
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