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US 6,873,492 B2Granted
Magnetic media with readable topographical features in combination with a slider-mounted non-magnetic transducer
AssigneeImation Corp.
InventorGarry R. Lundstrom
Life of this patent
Estimating the term…
Abstract
Magnetic patterned media comprise topographical features readable with a slider-mounted non-magnetic transducer sensitive primarily to a local aerodynamic boundary condition, in addition to a magnetic recording layer substantially conforming to the topographical features. Passage of a transducer over the features generates effects that can be detected in, and separated from, the magnetic recording signal.
Claims15
In combination,
- a) a recording medium having a magnetic recording layer substantially conforming to a substrate having topographical features, wherein the topographical features extend above a surface of the substrate to readably affect a local aerodynamic boundary condition, the topographical features extend above the surface to a height that is greater than or equal to approximately five nanometers and less than or equal to approximately one hundred nanometers, and an arrangement of the topographical features on the substrate defines a data signal;
- and
- b) a slider-mounted non-magnetic transducer sensitive primarily to the local aerodynamic boundary condition to read the topographical features.
In combination,
- a) a recording medium having a magnetic recording layer substantially conforming to a substrate having topographical features, wherein the topographical features extend below a surface of the substrate to readably affect a local aerodynamic boundary condition, the topographical features extend below the surface to a depth that is greater than or equal to approximately twenty nanometers and less than or equal to approximately one hundred and fifty nanometers, and an arrangement of the topographical features on the substrate defines a data signal;
- and
- b) a slider-mounted non-magnetic transducer sensitive primarily to the local aerodynamic boundary condition to read the topographical features.
Dependencies are inferred from the claim text.