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US 11,393,501 B2Granted
Protective layer for mitigating protruding defects in magnetic tape recording media
AssigneeInternational Business Machines Corporation
InventorsRobert G. Biskeborn, Calvin S. Lo
Life of this patent
Estimating the term…
Abstract
A magnetic recording medium according to one embodiment includes a base film and a first nonmagnetic layer above the base film. The first nonmagnetic layer has first nonmagnetic particles. A second nonmagnetic layer is positioned above the first nonmagnetic layer, the second nonmagnetic layer having second nonmagnetic particles. A magnetic layer is positioned above the second nonmagnetic layer, the magnetic layer including a magnetic material.
Claims18
A magnetic recording medium, comprising:
- a base film;
- a first nonmagnetic layer above the base film, the first nonmagnetic layer having first nonmagnetic particles of a first nonmagnetic material;
- a second nonmagnetic layer formed above an upper surface of the first nonmagnetic layer, the second nonmagnetic layer having second nonmagnetic particles;
- and
- a magnetic layer above the second nonmagnetic layer, the magnetic layer including a magnetic material,
- wherein the first nonmagnetic layer includes at least one larger particle of the first nonmagnetic material having a dimension that is at least 50% larger than an average diameter of the first nonmagnetic particles in the first nonmagnetic layer,
- wherein the at least one larger particle protrudes out of the first nonmagnetic layer and into the second nonmagnetic layer.
4 more elements
A magnetic recording medium, comprising:
- a base film;
- a first nonmagnetic layer above the base film, the first nonmagnetic layer having first nonmagnetic particles;
- a second nonmagnetic layer above the first nonmagnetic layer, the second nonmagnetic layer having second nonmagnetic particles;
- and
- a magnetic layer above the second nonmagnetic layer, the magnetic layer including a magnetic material,
- wherein the first nonmagnetic layer includes at least one larger particle having a dimension that is greater than a thickness of the first nonmagnetic layer,
- wherein the at least one larger particle protrudes out of the first nonmagnetic layer and into the second nonmagnetic layer.
4 more elements
Dependencies are inferred from the claim text.