Method and coating transition metal oxide on thin film magnetic disks
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United States of America Patent
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Oct 24, 1989
Grant Date -
N/A
app pub date -
Feb 4, 1988
filing date -
Feb 4, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Hard magnetic recording disks include a rigid substrate, typically aluminum, ceramic, or glass, having an underlayer thereover, typically being nickel-phosphorus. A ferromagnetic film is formed over the underlayer, and a protective coating layer formed over the ferromagnetic layer. The protective coating layer is a metal oxide formed by applying a liquid metal oxide precursor material over the ferromagnetic layer, and curing the liquid precursor material to leave a metal oxide layer in place. Optionally, a lubricating or carbon layer may be formed over the protective layer.
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