Patent
US 9,305,571MAGNETIC DEVICES AND MAGNETIC MEDIA WITH GRAPHENE OVERCOAT
Bruce A. Gurney
US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 9,305,571Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A magnetic disk, comprising: a perpendicular magnetic recording layer; and a single monoatomic layer of graphene formed above the perpendicular magnetic recording layer as a continuous film extending across the perpendicular magnetic recording layer, wherein the graphene monoatomic layer is a single atomic sheet of sp 2 -bonded carbon atoms that are densely packed in a honeycomb crystal lattice, and wherein the graphene monoatomic layer is as thick as one carbon atom, and wherein only one graphene monoatomic la y er is present above the perpendicular magnetic recording layer about 0.2 nm in thickness; and a lubricant layer directly on the single monoatomic layer of graphene.
The magnetic disk as recited in claim 1, further comprising a nucleation layer formed between the perpendicular magnetic recording layer and the graphene monoatomic layer, the nucleation layer being configured for adsorption of a carbon precursor on an upper surface of the nucleation layer.
(WITHDRAWN-PREVIOUSLY PRESENTED) A method, comprising: forming a nucleation layer above the perpendicular magnetic recording layer of the magnetic disk of claim 1; and forming the graphene monoatomic layer on the nucleation layer.
The magnetic disk as recited in claim 1, wherein the graphene monoatomic layer is configured to provide co rr osion protection to the perpendicular magnetic recording layer.
The magnetic disk as recited in claim 1, wherein-the graphene monoatomic layer extends above an entirety of an upper surface of the perpendicular magnetic recording layer.
The magnetic disk as recited in claim 1, wherein the magnetic disk is a bit patterned medium.
The magnetic disk as recited in claim 1, wherein the graphene monoatomic layer has a structural property of being impermeable to atomic helium. HI T₁P₄₇₄/H S J₉₂₀₀₉₀₀₉₇U S 1-4 -
The magnetic disk as recited in claim 1, wherein the graphene monoatomic layer is a contiguous sheet extending across all of the recording layer.
The magnetic disk as recited in claim 3, wherein the single graphene monoatomic layer is formed directly on and is conformal to the nucleation layer.
The magnetic disk as recited in claim 2, wherein a thickness of the nucleation layer and the graphene monoatomic layer together is between about 0.5 nm and about 3.0 nm.
canceled
canceled
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-25. canceled
canceled
A magnetic disk, comprising: a recording layer; a nucleation layer formed above the recording layer; and a continuous film formed above and extending across an entirety of the nucleation layer, the continuous film consisting of a single monoatomic layer of graphene, wherein the monoatomic layer of graphene is one carbon atom in thickness, wherein the monoatomic layer of graphene is a single atomic sheet of sp 2- bonded carbon atoms that are densely packed in a honeycomb crystal lattice, wherein the monoatomic layer of graphene has a structural property of being impermeable to atomic helium, wherein the monoatomic layer of graphene acts as a protective film that protects the recording layer from corrosion, and wherein only one monoatomic layer of graphene is present above the recording layer.
The magnetic disk as recited in claim 33, wherein a thickness of the nucleation layer and the graphene monoatomic layer together is between about 0.5 nm and about 3.0 nm, and further comprising a lubricant layer directly on the single monoatomic layer of graphene. HIT 1P₄₇₄/H S J₉₂₀₀₉₀₀₉₇U S 1-5 -
Layer stacks claimed or described, ordered top of device to substrate.
magnetic disk with perpendicular recording layer and graphene overcoat
magnetic disk with recording layer, nucleation layer, and graphene overcoat
Materials described outside the worked examples.
graphene monoatomic layer
C
perpendicular magnetic recording layer
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene monoatomic layer thickness | 0.2 nm | C |
C-C bond length in graphene |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 9,305,571Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A magnetic disk, comprising: a perpendicular magnetic recording layer; and a single monoatomic layer of graphene formed above the perpendicular magnetic recording layer as a continuous film extending across the perpendicular magnetic recording layer, wherein the graphene monoatomic layer is a single atomic sheet of sp 2 -bonded carbon atoms that are densely packed in a honeycomb crystal lattice, and wherein the graphene monoatomic layer is as thick as one carbon atom, and wherein only one graphene monoatomic la y er is present above the perpendicular magnetic recording layer about 0.2 nm in thickness; and a lubricant layer directly on the single monoatomic layer of graphene.
The magnetic disk as recited in claim 1, further comprising a nucleation layer formed between the perpendicular magnetic recording layer and the graphene monoatomic layer, the nucleation layer being configured for adsorption of a carbon precursor on an upper surface of the nucleation layer.
(WITHDRAWN-PREVIOUSLY PRESENTED) A method, comprising: forming a nucleation layer above the perpendicular magnetic recording layer of the magnetic disk of claim 1; and forming the graphene monoatomic layer on the nucleation layer.
The magnetic disk as recited in claim 1, wherein the graphene monoatomic layer is configured to provide co rr osion protection to the perpendicular magnetic recording layer.
The magnetic disk as recited in claim 1, wherein-the graphene monoatomic layer extends above an entirety of an upper surface of the perpendicular magnetic recording layer.
The magnetic disk as recited in claim 1, wherein the magnetic disk is a bit patterned medium.
The magnetic disk as recited in claim 1, wherein the graphene monoatomic layer has a structural property of being impermeable to atomic helium. HI T₁P₄₇₄/H S J₉₂₀₀₉₀₀₉₇U S 1-4 -
The magnetic disk as recited in claim 1, wherein the graphene monoatomic layer is a contiguous sheet extending across all of the recording layer.
The magnetic disk as recited in claim 3, wherein the single graphene monoatomic layer is formed directly on and is conformal to the nucleation layer.
The magnetic disk as recited in claim 2, wherein a thickness of the nucleation layer and the graphene monoatomic layer together is between about 0.5 nm and about 3.0 nm.
canceled
canceled
canceled
canceled
canceled
-25. canceled
canceled
A magnetic disk, comprising: a recording layer; a nucleation layer formed above the recording layer; and a continuous film formed above and extending across an entirety of the nucleation layer, the continuous film consisting of a single monoatomic layer of graphene, wherein the monoatomic layer of graphene is one carbon atom in thickness, wherein the monoatomic layer of graphene is a single atomic sheet of sp 2- bonded carbon atoms that are densely packed in a honeycomb crystal lattice, wherein the monoatomic layer of graphene has a structural property of being impermeable to atomic helium, wherein the monoatomic layer of graphene acts as a protective film that protects the recording layer from corrosion, and wherein only one monoatomic layer of graphene is present above the recording layer.
The magnetic disk as recited in claim 33, wherein a thickness of the nucleation layer and the graphene monoatomic layer together is between about 0.5 nm and about 3.0 nm, and further comprising a lubricant layer directly on the single monoatomic layer of graphene. HIT 1P₄₇₄/H S J₉₂₀₀₉₀₀₉₇U S 1-5 -
Layer stacks claimed or described, ordered top of device to substrate.
magnetic disk with perpendicular recording layer and graphene overcoat
magnetic disk with recording layer, nucleation layer, and graphene overcoat
Materials described outside the worked examples.
graphene monoatomic layer
C
perpendicular magnetic recording layer
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene monoatomic layer thickness | 0.2 nm | C |
C-C bond length in graphene |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 9,305,571Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A magnetic disk, comprising: a perpendicular magnetic recording layer; and a single monoatomic layer of graphene formed above the perpendicular magnetic recording layer as a continuous film extending across the perpendicular magnetic recording layer, wherein the graphene monoatomic layer is a single atomic sheet of sp 2 -bonded carbon atoms that are densely packed in a honeycomb crystal lattice, and wherein the graphene monoatomic layer is as thick as one carbon atom, and wherein only one graphene monoatomic la y er is present above the perpendicular magnetic recording layer about 0.2 nm in thickness; and a lubricant layer directly on the single monoatomic layer of graphene.
The magnetic disk as recited in claim 1, further comprising a nucleation layer formed between the perpendicular magnetic recording layer and the graphene monoatomic layer, the nucleation layer being configured for adsorption of a carbon precursor on an upper surface of the nucleation layer.
(WITHDRAWN-PREVIOUSLY PRESENTED) A method, comprising: forming a nucleation layer above the perpendicular magnetic recording layer of the magnetic disk of claim 1; and forming the graphene monoatomic layer on the nucleation layer.
The magnetic disk as recited in claim 1, wherein the graphene monoatomic layer is configured to provide co rr osion protection to the perpendicular magnetic recording layer.
The magnetic disk as recited in claim 1, wherein-the graphene monoatomic layer extends above an entirety of an upper surface of the perpendicular magnetic recording layer.
The magnetic disk as recited in claim 1, wherein the magnetic disk is a bit patterned medium.
The magnetic disk as recited in claim 1, wherein the graphene monoatomic layer has a structural property of being impermeable to atomic helium. HI T₁P₄₇₄/H S J₉₂₀₀₉₀₀₉₇U S 1-4 -
The magnetic disk as recited in claim 1, wherein the graphene monoatomic layer is a contiguous sheet extending across all of the recording layer.
The magnetic disk as recited in claim 3, wherein the single graphene monoatomic layer is formed directly on and is conformal to the nucleation layer.
The magnetic disk as recited in claim 2, wherein a thickness of the nucleation layer and the graphene monoatomic layer together is between about 0.5 nm and about 3.0 nm.
canceled
canceled
canceled
canceled
canceled
-25. canceled
canceled
A magnetic disk, comprising: a recording layer; a nucleation layer formed above the recording layer; and a continuous film formed above and extending across an entirety of the nucleation layer, the continuous film consisting of a single monoatomic layer of graphene, wherein the monoatomic layer of graphene is one carbon atom in thickness, wherein the monoatomic layer of graphene is a single atomic sheet of sp 2- bonded carbon atoms that are densely packed in a honeycomb crystal lattice, wherein the monoatomic layer of graphene has a structural property of being impermeable to atomic helium, wherein the monoatomic layer of graphene acts as a protective film that protects the recording layer from corrosion, and wherein only one monoatomic layer of graphene is present above the recording layer.
The magnetic disk as recited in claim 33, wherein a thickness of the nucleation layer and the graphene monoatomic layer together is between about 0.5 nm and about 3.0 nm, and further comprising a lubricant layer directly on the single monoatomic layer of graphene. HIT 1P₄₇₄/H S J₉₂₀₀₉₀₀₉₇U S 1-5 -
Layer stacks claimed or described, ordered top of device to substrate.
magnetic disk with perpendicular recording layer and graphene overcoat
magnetic disk with recording layer, nucleation layer, and graphene overcoat
Materials described outside the worked examples.
graphene monoatomic layer
C
perpendicular magnetic recording layer
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene monoatomic layer thickness | 0.2 nm | C |
C-C bond length in graphene |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 9,305,571Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A magnetic disk, comprising: a perpendicular magnetic recording layer; and a single monoatomic layer of graphene formed above the perpendicular magnetic recording layer as a continuous film extending across the perpendicular magnetic recording layer, wherein the graphene monoatomic layer is a single atomic sheet of sp 2 -bonded carbon atoms that are densely packed in a honeycomb crystal lattice, and wherein the graphene monoatomic layer is as thick as one carbon atom, and wherein only one graphene monoatomic la y er is present above the perpendicular magnetic recording layer about 0.2 nm in thickness; and a lubricant layer directly on the single monoatomic layer of graphene.
The magnetic disk as recited in claim 1, further comprising a nucleation layer formed between the perpendicular magnetic recording layer and the graphene monoatomic layer, the nucleation layer being configured for adsorption of a carbon precursor on an upper surface of the nucleation layer.
(WITHDRAWN-PREVIOUSLY PRESENTED) A method, comprising: forming a nucleation layer above the perpendicular magnetic recording layer of the magnetic disk of claim 1; and forming the graphene monoatomic layer on the nucleation layer.
The magnetic disk as recited in claim 1, wherein the graphene monoatomic layer is configured to provide co rr osion protection to the perpendicular magnetic recording layer.
The magnetic disk as recited in claim 1, wherein-the graphene monoatomic layer extends above an entirety of an upper surface of the perpendicular magnetic recording layer.
The magnetic disk as recited in claim 1, wherein the magnetic disk is a bit patterned medium.
The magnetic disk as recited in claim 1, wherein the graphene monoatomic layer has a structural property of being impermeable to atomic helium. HI T₁P₄₇₄/H S J₉₂₀₀₉₀₀₉₇U S 1-4 -
The magnetic disk as recited in claim 1, wherein the graphene monoatomic layer is a contiguous sheet extending across all of the recording layer.
The magnetic disk as recited in claim 3, wherein the single graphene monoatomic layer is formed directly on and is conformal to the nucleation layer.
The magnetic disk as recited in claim 2, wherein a thickness of the nucleation layer and the graphene monoatomic layer together is between about 0.5 nm and about 3.0 nm.
canceled
canceled
canceled
canceled
canceled
-25. canceled
canceled
A magnetic disk, comprising: a recording layer; a nucleation layer formed above the recording layer; and a continuous film formed above and extending across an entirety of the nucleation layer, the continuous film consisting of a single monoatomic layer of graphene, wherein the monoatomic layer of graphene is one carbon atom in thickness, wherein the monoatomic layer of graphene is a single atomic sheet of sp 2- bonded carbon atoms that are densely packed in a honeycomb crystal lattice, wherein the monoatomic layer of graphene has a structural property of being impermeable to atomic helium, wherein the monoatomic layer of graphene acts as a protective film that protects the recording layer from corrosion, and wherein only one monoatomic layer of graphene is present above the recording layer.
The magnetic disk as recited in claim 33, wherein a thickness of the nucleation layer and the graphene monoatomic layer together is between about 0.5 nm and about 3.0 nm, and further comprising a lubricant layer directly on the single monoatomic layer of graphene. HIT 1P₄₇₄/H S J₉₂₀₀₉₀₀₉₇U S 1-5 -
Layer stacks claimed or described, ordered top of device to substrate.
magnetic disk with perpendicular recording layer and graphene overcoat
magnetic disk with recording layer, nucleation layer, and graphene overcoat
Materials described outside the worked examples.
graphene monoatomic layer
C
perpendicular magnetic recording layer
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene monoatomic layer thickness | 0.2 nm | C |
C-C bond length in graphene |
Related documents with shared materials, methods, properties, or citations.
lubricant layer
nucleation layer
nucleation layer metals
graphene precursors
recording layer (generic)
SiC
amorphous diamond-like carbon (DLC)
C |
nucleation layer thickness (claim 5) | 0.2–1 nm | nucleation layer |
combined nucleation layer + graphene thickness (claim 6) | 0.5–7 nm | nucleation layer |
combined nucleation layer + graphene thickness (claims 32, 34) | 0.5–3 nm | C |
Thickness | 0.2–5 nm | — |
Thickness | 0.2–0.7 nm | — |
lubricant layer
nucleation layer
nucleation layer metals
graphene precursors
recording layer (generic)
SiC
amorphous diamond-like carbon (DLC)
C |
nucleation layer thickness (claim 5) | 0.2–1 nm | nucleation layer |
combined nucleation layer + graphene thickness (claim 6) | 0.5–7 nm | nucleation layer |
combined nucleation layer + graphene thickness (claims 32, 34) | 0.5–3 nm | C |
Thickness | 0.2–5 nm | — |
Thickness | 0.2–0.7 nm | — |
lubricant layer
nucleation layer
nucleation layer metals
graphene precursors
recording layer (generic)
SiC
amorphous diamond-like carbon (DLC)
C |
nucleation layer thickness (claim 5) | 0.2–1 nm | nucleation layer |
combined nucleation layer + graphene thickness (claim 6) | 0.5–7 nm | nucleation layer |
combined nucleation layer + graphene thickness (claims 32, 34) | 0.5–3 nm | C |
Thickness | 0.2–5 nm | — |
Thickness | 0.2–0.7 nm | — |
lubricant layer
nucleation layer
nucleation layer metals
graphene precursors
recording layer (generic)
SiC
amorphous diamond-like carbon (DLC)
C |
nucleation layer thickness (claim 5) | 0.2–1 nm | nucleation layer |
combined nucleation layer + graphene thickness (claim 6) | 0.5–7 nm | nucleation layer |
combined nucleation layer + graphene thickness (claims 32, 34) | 0.5–3 nm | C |
Thickness | 0.2–5 nm | — |
Thickness | 0.2–0.7 nm | — |