Magnetic material for non-reactive process of granular perpendicular recording application
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United States of America Patent
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app pub date -
Oct 12, 2005
filing date -
Nov 3, 2003
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Abstract
A magnetic recording medium having a substrate and a SiO.sub.2-containing magnetic layer comprising grains is disclosed. The magnetic layer has substantial SiO.sub.2 between the grains. This condition is achieved by sputter depositing the magnetic layer in a chamber containing a gas under vacuum. The gas contains substantially no oxygen. Such a gas is one into which no oxygen is intentionally introduced to create an oxygen-containing gas mixture but may contain a trace amount of oxygen molecules in an amount that are present in air under a similar vacuum as that of the gas in the chamber.
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