Back to results
US 9,431,045 B1Granted
Magnetic seed layer used with an unbalanced soft underlayer
AssigneeWD Media, LLC
InventorsZhenguo Wang, Iwao Okamoto, Sy Vu, Daehoon Hong
Life of this patent
Estimating the term…
Abstract
A magnetic media is described including a substrate, an unbalanced soft under layer (SUL), a magnetic seed layer, which may consist of one or more of NiWxCoy, NiWxCoyAlz, NiVaCob, NiVaCobAlc, NiWxVaCob, and NiWxVaFeb, and a magnetic recording layer.
Claims19
A magnetic media comprising:
- a substrate;
- an unbalanced soft under layer (SUL) including a top SUL;
- a magnetic seed layer consisting of a material selected from a first alloy and a second alloy, the first alloy including at least one of NiVaCob, NiVaCobAlc, NiWxVaCob and NiWxVaFeb, the second alloy including at least one of NiWxFey, NiWxCoy and NiWxCoyAlz, where x is between 3 and 7 atomic percent, y and z are between 15 and 40 atomic percent, a is between 5 and 15 atomic percent, b is between 15 to 40 atomic percent, and c is between 0.5 to 2 atomic percent;
- and
- a magnetic recording layer.
2 more elements
A disk drive comprising:
- a slider including a magnetic head for reading and writing to a magnetic media;
- the magnetic media comprising:
- a substrate;
- an unbalanced soft under layer (SUL) including a top SUL;
- a magnetic seed layer consisting of a material selected from a first alloy and a second alloy, the first alloy including at least one of NiVaCob, NiVaCobAlc, NiWxVaCob and NiWxVaFeb, the second alloy including at least one of NiWxFey, NiWxCoy and NiWxCoyAlz, where x is between 3 and 7 atomic percent, y and z are between 15 and 40 atomic percent, a is between 5 and 15 atomic percent, b is between 15 to 40 atomic percent, and c is between 0.5 to 2 atomic percent;
- and
- a magnetic recording layer.
4 more elements
A method for providing a magnetic media having an unbalanced Soft Under Layer (SUL) comprising:
- providing a substrate;
- providing an unbalanced soft under layer (SUL);
- providing a magnetic seed layer consisting of a material selected from a first alloy and a second alloy, the first alloy including at least one of NiVaCob, NiVaCobAlc, NiWxVaCob and NiWxVaFeb, the second alloy including at least one of NiWxFey, NiWxCoy and NiWxCoyAlz, where x is between 3 and 7 atomic percent, y and z are between 15 and 40 atomic percent, a is between 5 and 15 atomic percent, b is between 15 to 40 atomic percent, and c is between 0.5 to 2 atomic percent;
- and
- providing a magnetic recording layer.
2 more elements
Dependencies are inferred from the claim text.