Patent
US 9,153,268LUBRICANTS COMPRISING FLUORINATED GRAPHENE NANORIBBONS FOR MAGNETIC RECORDING MEDIA STRUCTURE
BERNHARD E. KNIGGE
US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 9,153,268Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is a diagram illustrating the end-group clustering problem due to interactions between -OH end groups associated with conventional lubricants. [009]
FIG. 2 is a diagram illustrating formation of inverted U-shaped structures resulting from the attachment of the end groups on the CO C surface associated with …
FIG. 3 is a diagram depicting a HDD system comprising a magnetic recording media stack ("disk") and a magnetic read/write head ("head") according to certain …
FIG. 4 is a diagram depicting one fluorinated graphene nanoribbon (FGNR) that can be used as lubricant in the magnetic recording media stack shown in
FIG. 5A is a diagram depicting a cross- sectional view of a disk with FGNR l ubricant and a head according to certain aspects of the subject disclosure. [013]
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
Atty. Docket No. M₆₃₃₈ In The Claims 1. A magnetic recording media structure comprising: a substrate; a magnetic recording layer for recording information disposed over the substrate; a protective overcoat layer for protecting the magnetic recording layer disposed over the magnetic recording layer; and a lubricant layer disposed over the protective overcoat layer and comprising a fluorinated graphene nanoribbon, wherein the protective overcoat layer comprises a carbon overcoat (COC).
The magnetic recording media structure of claim 1, wherein the magnetic recording media structure is a heat assisted magnetic recording (HAMR) media structure.
The magnetic recording media structure of claim 1, wherein the protective overcoat layer has a thickness between about 0.5 and 4 nm.
The magnetic recording media structure of claim 1, wherein the lubricant layer has a thickness between about 0.5 and 3 nm.
canceled
A magnetic recording media structure comprising: a substrate; a magnetic recording layer for recording information disposed over the substrate; a protective overcoat layer for protecting the magnetic recording layer disposed over the magnetic recording layer; and SMRH:435800933. 1 -2- Atty. Docket No. M₆₃₃₈ a lubricant layer disposed over the protective overcoat layer and comprising a fluorinated graphene nanoribbon, wherein the fluorinated graphene nanoribbon has a length between about 1 and 30 nm.
A magnetic recording media structure comprising: a substrate; a magnetic recording layer for recording information disposed over the substrate; a protective overcoat layer for protecting the magnetic recording layer disposed over the magnetic recording layer; and a lubricant layer disposed over the protective overcoat layer and comprising a fluorinated graphene nanoribbon, wherein the fluorinated graphene nanoribbon has a width between about 2 and 20 angstroms.
8-11. canceled
canceled
canceled
canceled
A method of lubricating a hard disk drive, the method comprising: providing a magnetic recording media stack comprising a magnetic recording layer for recording information and a protective overcoat layer disposed over the magnetic recording layer; and providing a lubricant layer comprising a fluorinated graphene nanoribbon on the protective overcoat layer, wherein the protective overcoat layer comprises a carbon overcoat (CO C).
1 3. The method of claim 12, where in the fluorinated graphene nanoribbon is grown in situ on the CO C during fabrication of the magnetic recording media stack.
The method of claim 12, wherein the fluorinated graphene nanoribbon is applied to the CO C after the magnetic recording media stack has been fabricated.
16-19. SMRH:435800933.1 -4- canceled
canceled
canceled
canceled
Layer stacks claimed or described, ordered top of device to substrate.
magnetic recording media structure
Materials described outside the worked examples.
fluorinated graphene nanoribbon
carbon overcoat
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
FGNR lubricant film thickness (simulation) | 8 angstrom | fluorinated graphene nanoribbon (FGNR) example |
head-media spacing with FGNR lubricant (simulation) | 27 angstrom |
Patent
Atlas literature
Patent
US 9,153,268Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is a diagram illustrating the end-group clustering problem due to interactions between -OH end groups associated with conventional lubricants. [009]
FIG. 2 is a diagram illustrating formation of inverted U-shaped structures resulting from the attachment of the end groups on the CO C surface associated with …
FIG. 3 is a diagram depicting a HDD system comprising a magnetic recording media stack ("disk") and a magnetic read/write head ("head") according to certain …
FIG. 4 is a diagram depicting one fluorinated graphene nanoribbon (FGNR) that can be used as lubricant in the magnetic recording media stack shown in
FIG. 5A is a diagram depicting a cross- sectional view of a disk with FGNR l ubricant and a head according to certain aspects of the subject disclosure. [013]
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
Atty. Docket No. M₆₃₃₈ In The Claims 1. A magnetic recording media structure comprising: a substrate; a magnetic recording layer for recording information disposed over the substrate; a protective overcoat layer for protecting the magnetic recording layer disposed over the magnetic recording layer; and a lubricant layer disposed over the protective overcoat layer and comprising a fluorinated graphene nanoribbon, wherein the protective overcoat layer comprises a carbon overcoat (COC).
The magnetic recording media structure of claim 1, wherein the magnetic recording media structure is a heat assisted magnetic recording (HAMR) media structure.
The magnetic recording media structure of claim 1, wherein the protective overcoat layer has a thickness between about 0.5 and 4 nm.
The magnetic recording media structure of claim 1, wherein the lubricant layer has a thickness between about 0.5 and 3 nm.
canceled
A magnetic recording media structure comprising: a substrate; a magnetic recording layer for recording information disposed over the substrate; a protective overcoat layer for protecting the magnetic recording layer disposed over the magnetic recording layer; and SMRH:435800933. 1 -2- Atty. Docket No. M₆₃₃₈ a lubricant layer disposed over the protective overcoat layer and comprising a fluorinated graphene nanoribbon, wherein the fluorinated graphene nanoribbon has a length between about 1 and 30 nm.
A magnetic recording media structure comprising: a substrate; a magnetic recording layer for recording information disposed over the substrate; a protective overcoat layer for protecting the magnetic recording layer disposed over the magnetic recording layer; and a lubricant layer disposed over the protective overcoat layer and comprising a fluorinated graphene nanoribbon, wherein the fluorinated graphene nanoribbon has a width between about 2 and 20 angstroms.
8-11. canceled
canceled
canceled
canceled
A method of lubricating a hard disk drive, the method comprising: providing a magnetic recording media stack comprising a magnetic recording layer for recording information and a protective overcoat layer disposed over the magnetic recording layer; and providing a lubricant layer comprising a fluorinated graphene nanoribbon on the protective overcoat layer, wherein the protective overcoat layer comprises a carbon overcoat (CO C).
1 3. The method of claim 12, where in the fluorinated graphene nanoribbon is grown in situ on the CO C during fabrication of the magnetic recording media stack.
The method of claim 12, wherein the fluorinated graphene nanoribbon is applied to the CO C after the magnetic recording media stack has been fabricated.
16-19. SMRH:435800933.1 -4- canceled
canceled
canceled
canceled
Layer stacks claimed or described, ordered top of device to substrate.
magnetic recording media structure
Materials described outside the worked examples.
fluorinated graphene nanoribbon
carbon overcoat
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
FGNR lubricant film thickness (simulation) | 8 angstrom | fluorinated graphene nanoribbon (FGNR) example |
head-media spacing with FGNR lubricant (simulation) | 27 angstrom |
Patent
Atlas literature
Patent
US 9,153,268Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is a diagram illustrating the end-group clustering problem due to interactions between -OH end groups associated with conventional lubricants. [009]
FIG. 2 is a diagram illustrating formation of inverted U-shaped structures resulting from the attachment of the end groups on the CO C surface associated with …
FIG. 3 is a diagram depicting a HDD system comprising a magnetic recording media stack ("disk") and a magnetic read/write head ("head") according to certain …
FIG. 4 is a diagram depicting one fluorinated graphene nanoribbon (FGNR) that can be used as lubricant in the magnetic recording media stack shown in
FIG. 5A is a diagram depicting a cross- sectional view of a disk with FGNR l ubricant and a head according to certain aspects of the subject disclosure. [013]
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
Atty. Docket No. M₆₃₃₈ In The Claims 1. A magnetic recording media structure comprising: a substrate; a magnetic recording layer for recording information disposed over the substrate; a protective overcoat layer for protecting the magnetic recording layer disposed over the magnetic recording layer; and a lubricant layer disposed over the protective overcoat layer and comprising a fluorinated graphene nanoribbon, wherein the protective overcoat layer comprises a carbon overcoat (COC).
The magnetic recording media structure of claim 1, wherein the magnetic recording media structure is a heat assisted magnetic recording (HAMR) media structure.
The magnetic recording media structure of claim 1, wherein the protective overcoat layer has a thickness between about 0.5 and 4 nm.
The magnetic recording media structure of claim 1, wherein the lubricant layer has a thickness between about 0.5 and 3 nm.
canceled
A magnetic recording media structure comprising: a substrate; a magnetic recording layer for recording information disposed over the substrate; a protective overcoat layer for protecting the magnetic recording layer disposed over the magnetic recording layer; and SMRH:435800933. 1 -2- Atty. Docket No. M₆₃₃₈ a lubricant layer disposed over the protective overcoat layer and comprising a fluorinated graphene nanoribbon, wherein the fluorinated graphene nanoribbon has a length between about 1 and 30 nm.
A magnetic recording media structure comprising: a substrate; a magnetic recording layer for recording information disposed over the substrate; a protective overcoat layer for protecting the magnetic recording layer disposed over the magnetic recording layer; and a lubricant layer disposed over the protective overcoat layer and comprising a fluorinated graphene nanoribbon, wherein the fluorinated graphene nanoribbon has a width between about 2 and 20 angstroms.
8-11. canceled
canceled
canceled
canceled
A method of lubricating a hard disk drive, the method comprising: providing a magnetic recording media stack comprising a magnetic recording layer for recording information and a protective overcoat layer disposed over the magnetic recording layer; and providing a lubricant layer comprising a fluorinated graphene nanoribbon on the protective overcoat layer, wherein the protective overcoat layer comprises a carbon overcoat (CO C).
1 3. The method of claim 12, where in the fluorinated graphene nanoribbon is grown in situ on the CO C during fabrication of the magnetic recording media stack.
The method of claim 12, wherein the fluorinated graphene nanoribbon is applied to the CO C after the magnetic recording media stack has been fabricated.
16-19. SMRH:435800933.1 -4- canceled
canceled
canceled
canceled
Layer stacks claimed or described, ordered top of device to substrate.
magnetic recording media structure
Materials described outside the worked examples.
fluorinated graphene nanoribbon
carbon overcoat
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
FGNR lubricant film thickness (simulation) | 8 angstrom | fluorinated graphene nanoribbon (FGNR) example |
head-media spacing with FGNR lubricant (simulation) | 27 angstrom |
Patent
Atlas literature
Patent
US 9,153,268Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is a diagram illustrating the end-group clustering problem due to interactions between -OH end groups associated with conventional lubricants. [009]
FIG. 2 is a diagram illustrating formation of inverted U-shaped structures resulting from the attachment of the end groups on the CO C surface associated with …
FIG. 3 is a diagram depicting a HDD system comprising a magnetic recording media stack ("disk") and a magnetic read/write head ("head") according to certain …
FIG. 4 is a diagram depicting one fluorinated graphene nanoribbon (FGNR) that can be used as lubricant in the magnetic recording media stack shown in
FIG. 5A is a diagram depicting a cross- sectional view of a disk with FGNR l ubricant and a head according to certain aspects of the subject disclosure. [013]
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
Atty. Docket No. M₆₃₃₈ In The Claims 1. A magnetic recording media structure comprising: a substrate; a magnetic recording layer for recording information disposed over the substrate; a protective overcoat layer for protecting the magnetic recording layer disposed over the magnetic recording layer; and a lubricant layer disposed over the protective overcoat layer and comprising a fluorinated graphene nanoribbon, wherein the protective overcoat layer comprises a carbon overcoat (COC).
The magnetic recording media structure of claim 1, wherein the magnetic recording media structure is a heat assisted magnetic recording (HAMR) media structure.
The magnetic recording media structure of claim 1, wherein the protective overcoat layer has a thickness between about 0.5 and 4 nm.
The magnetic recording media structure of claim 1, wherein the lubricant layer has a thickness between about 0.5 and 3 nm.
canceled
A magnetic recording media structure comprising: a substrate; a magnetic recording layer for recording information disposed over the substrate; a protective overcoat layer for protecting the magnetic recording layer disposed over the magnetic recording layer; and SMRH:435800933. 1 -2- Atty. Docket No. M₆₃₃₈ a lubricant layer disposed over the protective overcoat layer and comprising a fluorinated graphene nanoribbon, wherein the fluorinated graphene nanoribbon has a length between about 1 and 30 nm.
A magnetic recording media structure comprising: a substrate; a magnetic recording layer for recording information disposed over the substrate; a protective overcoat layer for protecting the magnetic recording layer disposed over the magnetic recording layer; and a lubricant layer disposed over the protective overcoat layer and comprising a fluorinated graphene nanoribbon, wherein the fluorinated graphene nanoribbon has a width between about 2 and 20 angstroms.
8-11. canceled
canceled
canceled
canceled
A method of lubricating a hard disk drive, the method comprising: providing a magnetic recording media stack comprising a magnetic recording layer for recording information and a protective overcoat layer disposed over the magnetic recording layer; and providing a lubricant layer comprising a fluorinated graphene nanoribbon on the protective overcoat layer, wherein the protective overcoat layer comprises a carbon overcoat (CO C).
1 3. The method of claim 12, where in the fluorinated graphene nanoribbon is grown in situ on the CO C during fabrication of the magnetic recording media stack.
The method of claim 12, wherein the fluorinated graphene nanoribbon is applied to the CO C after the magnetic recording media stack has been fabricated.
16-19. SMRH:435800933.1 -4- canceled
canceled
canceled
canceled
Layer stacks claimed or described, ordered top of device to substrate.
magnetic recording media structure
Materials described outside the worked examples.
fluorinated graphene nanoribbon
carbon overcoat
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
FGNR lubricant film thickness (simulation) | 8 angstrom | fluorinated graphene nanoribbon (FGNR) example |
head-media spacing with FGNR lubricant (simulation) | 27 angstrom |
nitrogenated diamond-like carbon (COC disk surface)
hydrogenated DLC (head COC)
fluorinated graphene nanoribbon (FGNR) example |
interaction energy of FGNR with disk per molecule | -6.36 kcal/mol | fluorinated graphene nanoribbon (FGNR) example |
FGNR molecular weight (example in FIG. 4) | 1898 g/mol | fluorinated graphene nanoribbon (FGNR) example |
Thickness | 0.5–4 nm | — |
Thickness | 1–30 nm | — |
Thickness | 2–20 Å | — |
Thickness | 0.5–3 nm | — |
nitrogenated diamond-like carbon (COC disk surface)
hydrogenated DLC (head COC)
fluorinated graphene nanoribbon (FGNR) example |
interaction energy of FGNR with disk per molecule | -6.36 kcal/mol | fluorinated graphene nanoribbon (FGNR) example |
FGNR molecular weight (example in FIG. 4) | 1898 g/mol | fluorinated graphene nanoribbon (FGNR) example |
Thickness | 0.5–4 nm | — |
Thickness | 1–30 nm | — |
Thickness | 2–20 Å | — |
Thickness | 0.5–3 nm | — |
nitrogenated diamond-like carbon (COC disk surface)
hydrogenated DLC (head COC)
fluorinated graphene nanoribbon (FGNR) example |
interaction energy of FGNR with disk per molecule | -6.36 kcal/mol | fluorinated graphene nanoribbon (FGNR) example |
FGNR molecular weight (example in FIG. 4) | 1898 g/mol | fluorinated graphene nanoribbon (FGNR) example |
Thickness | 0.5–4 nm | — |
Thickness | 1–30 nm | — |
Thickness | 2–20 Å | — |
Thickness | 0.5–3 nm | — |
nitrogenated diamond-like carbon (COC disk surface)
hydrogenated DLC (head COC)
fluorinated graphene nanoribbon (FGNR) example |
interaction energy of FGNR with disk per molecule | -6.36 kcal/mol | fluorinated graphene nanoribbon (FGNR) example |
FGNR molecular weight (example in FIG. 4) | 1898 g/mol | fluorinated graphene nanoribbon (FGNR) example |
Thickness | 0.5–4 nm | — |
Thickness | 1–30 nm | — |
Thickness | 2–20 Å | — |
Thickness | 0.5–3 nm | — |