Underlayer doping in thin film magnetic recording media

Details Underlayer doping in thin film magnetic recording media Underlayer doping in thin film magnetic recording media

G - Physics

11

B

G11B 5/85 (2006.01) C23C 16/06 (2006.01) G11B 5/73 (2006.01) G11B 5/738 (2006.01) G11B 5/851 (2006.01)

Patent

CA 2062154

The magnetic properties of a cobalt based, thin film, magnetic recording layer are controlled, independent of controlling the process for depositing the magnetic layer itself, by the introduction of process compatible dopant gases into an argon atmosphere during the vacuum deposition (i.e. a sputtering process or an evaporation process) of a chromium based underlayer upon which the magnetic layer is subsequently deposited. The same or a different dopant may also be introduced into the magnetic layer. The process compatible dopant gases described contain oxygen, nitrogen and/or carbon, and mixtures thereof, and include the group purified air, oxygen, nitrogen, a mixture of oxygen and nitrogen carbon monoxide, carbon dioxide, methane and water vapor.

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