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US 4,554,217 AGranted
Process for creating wear and corrosion resistant film for magnetic recording media
AssigneeVerbatim Corporation
InventorsM. Andreas Grimm, George W. Brock
Life of this patent
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Abstract
A process for forming a magnetic recording member composed of a substrate, a magnetic film, and a protective layer. The magnetic film is deposited on the substrate by means of DC or RF sputtering and electron beam vacuum deposition in a partial pressure of inert gas. During the final minutes of the sputter process, oxygen or carbon monoxide is injected into the vacuum chamber to form the protective layer.
Claims11
A wear and corrosion resistant magnetic recording member comprising:
- a substrate;
- a ferromagnetic recording layer;
- and
- a protective layer composed of a ferromagnetic carbide film.
1 more element
The method of producing a wear and corrosion resistant magnetic recording film in the steps of:
- depositing a thin ferromagnetic metal recording film on the substrate by means of DC or RF sputtering and electron beam vacuum deposition, done in the presence of an inert gas at partial pressure;
- and
- injecting high purity carbon monoxide gas into the sputter chamber during the final minutes of the sputter process sufficient to form a protective carbide layer on the recording film.
Dependencies are inferred from the claim text.