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US 8,609,263 B1Granted
Systems and methods for forming magnetic media with an underlayer
AssigneeWD Media, LLC
InventorsAlexander Chernyshov, Hua Yuan, B. Ramamurthy Acharya, Antony Ajan
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Abstract
Systems and methods for forming magnetic media with an underlayer are provided. One such method includes providing a non-magnetic substrate, forming a seed layer above the substrate, the seed layer including MgO, forming an underlayer on the seed layer, the underlayer including a material selected from the group consisting of Pd, Pt, W, Fe, V, Cu, and Ag, and forming a magnetic recording layer on the underlayer, the recording layer including FePt oxide.
Claims35
A method for fabricating a magnetic media with improved performance characteristics, the method comprising:
- providing a non-magnetic substrate;
- forming a seed layer above the substrate, the seed layer comprising MgO;
- forming an underlayer directly on the seed layer, the underlayer comprising a material selected from the group consisting of Pd, Pt, W, Fe, and V;
- and
- forming a magnetic recording layer on the underlayer, the recording layer comprising FePt oxide,
- wherein the underlayer comprises a thickness of less than 1 nm.
3 more elements
A method for fabricating a magnetic media with improved performance characteristics, the method comprising:
- providing a non-magnetic substrate;
- forming a seed layer above the substrate, the seed layer comprising MgO;
- forming an underlayer on the seed layer, the underlayer comprising a material selected from the group consisting of Pd, Pt, W, Fe, V, Cu, and Ag;
- forming a magnetic recording layer on the underlayer, the recording layer comprising FePt oxide;
- forming an amorphous underlayer on the non-magnetic substrate;
- forming a heat-sink layer on the amorphous underlayer;
- and
- forming an amorphous interlayer on the heat-sink layer,
- wherein the seed layer is positioned on the amorphous interlayer, and
- wherein the amorphous underlayer comprises CoTaZr and a material selected from the group consisting of CrTa, CoCrFeZrB, and CoCrTaZr.
7 more elements
A method for fabricating a magnetic media with improved performance characteristics, the method comprising:
- providing a non-magnetic substrate;
- forming a seed layer above the substrate, the seed layer comprising MgO;
- forming an underlayer on the seed layer, the underlayer comprising a material selected from the group consisting of Pd, Pt, W, Fe, V, Cu, and Ag;
- forming a magnetic recording layer on the underlayer, the recording layer comprising FePt oxide;
- forming an amorphous underlayer on the non-magnetic substrate;
- forming a heat-sink layer on the amorphous underlayer;
- and
- forming an amorphous interlayer on the heat-sink layer,
- wherein the seed layer is positioned on the amorphous interlayer,
- wherein the amorphous underlayer comprises a thickness of about 10 nanometers (nm) to about 50 nm,
- wherein the heat-sink layer comprises a thickness of about 10 nm to about 100 nm,
- wherein the amorphous interlayer comprises a thickness of about 10 nm to about 50 nm,
- wherein the seed layer comprises a thickness of about 1 nm to about 10 nm,
- wherein the underlayer comprises a thickness of less than 1 nm, and
- wherein the recording layer comprises a thickness of about 5 nm to about 15 nm.
12 more elements
The method of 2:
- wherein the amorphous underlayer comprises a thickness of about 40 nanometers (nm),
- wherein the heat-sink layer comprises a thickness of about 40 nm,
- wherein the amorphous interlayer comprises a thickness of about 20 nm,
- wherein the seed layer comprises a thickness of about 4 nm, and
- wherein the recording layer comprises a thickness of about 10 nm.
2 more elements
A magnetic media structure with improved performance characteristics, the media structure comprising:
- a non-magnetic substrate;
- an amorphous interlayer positioned on the non-magnetic substrate;
- a seed layer positioned on the amorphous interlayer, the seed layer comprising MgO;
- an underlayer positioned directly on the seed layer, the underlayer comprising a material selected from the group consisting of Pd, Pt, W, Fe, and V;
- and
- a magnetic recording layer positioned on the underlayer, the recording layer comprising FePt oxide,
- wherein the underlayer comprises a thickness of less than 1 nm.
4 more elements
A magnetic media structure with improved performance characteristics, the media structure comprising:
- a non-magnetic substrate;
- an amorphous interlayer positioned on the non-magnetic substrate;
- a seed layer positioned on the amorphous interlayer, the seed layer comprising MgO;
- an underlayer positioned on the seed layer, the underlayer comprising a material selected from the group consisting of Pd, Pt, W, Fe, V, Cu, and Ag;
- a magnetic recording layer positioned on the underlayer, the recording layer comprising FePt oxide;
- an amorphous underlayer positioned on the non-magnetic substrate;
- and
- a heat-sink layer positioned on the amorphous underlayer,
- wherein the amorphous interlayer is positioned on the heat-sink layer, and
- wherein the amorphous underlayer comprises CoTaZr and a material selected from the group consisting of CrTa, CoCrFeZrB, and CoCrTaZr.
7 more elements
A magnetic media structure with improved performance characteristics, the media structure comprising:
- a non-magnetic substrate;
- an amorphous interlayer positioned on the non-magnetic substrate;
- a seed layer positioned on the amorphous interlayer, the seed layer comprising MgO;
- an underlayer positioned on the seed layer, the underlayer comprising a material selected from the group consisting of Pd, Pt, W, Fe, V, Cu, and Ag;
- a magnetic recording layer positioned on the underlayer, the recording layer comprising FePt oxide;
- an amorphous underlayer positioned on the non-magnetic substrate;
- and
- a heat-sink layer positioned on the amorphous underlayer,
- wherein the amorphous interlayer is positioned on the heat-sink layer,
- wherein the amorphous underlayer comprises a thickness of about 10 nanometers (nm) to about 50 nm,
- wherein the heat-sink layer comprises a thickness of about 10 nm to about 100 nm,
- wherein the amorphous interlayer comprises a thickness of about 10 nm to about 50 nm,
- wherein the seed layer comprises a thickness of about 1 nm to about 10 nm,
- wherein the underlayer comprises a thickness of less than 1 nm, and
- wherein the recording layer comprises a thickness of about 5 nm to about 15 nm.
12 more elements
A method for fabricating a magnetic media with improved performance characteristics, the method comprising:
- providing a non-magnetic substrate;
- forming a seed layer above the substrate, the seed layer comprising MgO;
- forming an underlayer directly on the seed layer, the underlayer comprising a material selected from the group consisting of Pd, Pt, W, Fe, and V;
- and
- forming a magnetic recording layer on the underlayer, the recording layer comprising FePt oxide,
- wherein the underlayer comprises a thickness of substantially less than 1 nm.
3 more elements
A magnetic media structure with improved performance characteristics, the media structure comprising:
- a non-magnetic substrate;
- an amorphous interlayer positioned on the non-magnetic substrate;
- a seed layer positioned on the amorphous interlayer, the seed layer comprising MgO;
- an underlayer positioned directly on the seed layer, the underlayer comprising a material selected from the group consisting of Pd, Pt, W, Fe, and V;
- and
- a magnetic recording layer positioned on the underlayer, the recording layer comprising FePt oxide,
- wherein the underlayer comprises a thickness of substantially less than 1 nm.
4 more elements
Dependencies are inferred from the claim text.