Patterned ecc and gradient anisotropy media through electrodeposition
AssigneeSeagate Technology LLC
InventorsJiaoming Qiu, Ibro Tabakovic, Mark T. Kief, Hieu T. Lam, David S. Kuo, Jie Gong
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Abstract
An electrodeposited magnetic recording medium having multiple coercivity values is disclosed. In some embodiments, layers having different coercivity levels may be separated by exchange coupled composites and in other embodiments a range of coercivity levels are deposited in a gradient fashion. In some embodiments, the layers with multiple coercivity values comprise bit patterned media islands formed from a photoresist.
Claims20
A magnetic recording medium comprising:
- a. a substrate comprising a plurality of dots deposited on the substrate, the dots comprising;
- i. a first electroplated ferromagnetic composition having a first coercivity;
- and
- ii. a second electroplated ferromagnetic composition having a second coercivity.
A magnetic recording medium comprising a substrate with a ferromagnetic composition having a variable coercivity electrodeposited thereon, the coercivity of the ferromagnetic composition generally changing relative to the distance from the substrate.
A method of depositing a magnetic recording medium on a substrate comprising:
- placing a substrate in an electrolytic solution;
- electrolytically depositing a first ferromagnetic material on the substrate;
- changing a controlled potential or current density of the electrodeposition process;
- and
- electrolytically depositing a second ferromagnetic material on the first ferromagnetic material.
Dependencies are inferred from the claim text.