Magnetic recording media manufactured by a process in which a negative bias voltage is applied to the substrate during sputtering
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United States of America Patent
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Sep 15, 1992
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N/A
app pub date -
Mar 14, 1989
filing date -
Mar 15, 1988
priority date (Note) -
Expired
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Abstract
A magnetic recording member with improved coercive force is obtained by: (a) forming by sputtering or Cr film on a non-magnetic substrate; (b) forming by sputtering an epitaxially grown film of a Co alloy containing at least Cr as an additional metal on the Cr film formed in the step (a); and applying a negative bias voltage to the substrate during at least one of steps (a) and (b). The coercive force of the magnetic recording member is further increased when high-frequency sputtering is used instead of direct current sputtering.
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