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US 9,558,776 B1Granted
Durable coating for magnetic tape recording media
AssigneeInternational Business Machines Corporation
InventorsRobert G. Biskeborn, Gary M. Decad, Calvin S. Lo
Life of this patent
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Abstract
A product such as a magnetic recording tape, according to one embodiment, includes a flexible magnetic media having a substrate, a magnetic recording layer having cobalt therein, and an at least partially polycrystalline coating above the magnetic recording layer. A product according to another embodiment includes a flexible magnetic media having a substrate, a magnetic recording layer having cobalt therein, and coating above the magnetic recording layer. The coating includes a ceramic material.
Claims20
A product, comprising:
- a flexible magnetic media having a substrate, a magnetic recording layer having cobalt therein, and an at least partially polycrystalline coating above the magnetic recording layer,
- wherein the at least partially polycrystalline coating includes aluminum oxide and wherein a density of the at least partially polycrystalline coating due to crystallinity is at least 30% greater than that of a purely amorphous material of the same chemical composition and approximate thickness.
A product, comprising:
- a flexible magnetic media having a substrate, a magnetic recording layer having cobalt therein, and an at least partially polycrystalline coating above the magnetic recording layer,
- wherein the at least partially polycrystalline coating includes ruthenium oxide.
A product, comprising:
- a flexible magnetic media having a substrate, a magnetic recording layer having cobalt therein, and a nonmagnetic coating above the magnetic recording layer,
- wherein the coating comprises an at least partially polycrystalline layer formed of a material comprising aluminum oxide, ruthenium oxide, or both aluminum oxide and ruthenium oxide wherein a density of the coating due to crystallinity is at least 30% greater than that of a purely amorphous material of the same chemical composition and approximate thickness.
Dependencies are inferred from the claim text.