Coating processes – Magnetic base or coating – Magnetic coating
Patent
1988-02-04
1989-10-24
Pianalto, Bernard
Coating processes
Magnetic base or coating
Magnetic coating
427132, 427241, 427425, 427427, 427428, 427436, 4274432, 428 64, 428694, 428900, B05D 512
Patent
active
048761176
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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Domain Technology
Pianalto Bernard
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