US5462784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinated diamond-like carbon protective coating for magnetic recording media devices
Assignee: International Business Machines Corp
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Filing: 1994-11-02
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Granted: 1995-10-31
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Expires: 2014-11-02
Abstract
Abstract An improved wear-resistant protective coating for the surfaces of magnetic recording media devices that is formed of fluorinated diamond-like carbon and deposited by a plasma enhanced chemical vapor deposition process or other suitable methods to provide superior friction-reducing and stiction-reducing properties.
Inventors
- 👤 Alfred Grill
- 👤 Vishnubhai V. Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:22
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/127; G11B5/31; G11B5/3103; G11B5/3106; G11B5/187; G11B5/255; G11B5/72; G11B5/726; G11B5/7262; G11B5/7264; G11B5/84; G11B5/8408; Y; Y10; Y10S; Y10S427/00; Y10S427/103; Y10S427/106; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
19 words
A magnetic recording media device having a wear-resistant and reduced-stiction fluorinated diamond-like carbon film as the uppermost protective layer.
Claim 2
Dependent Claim
19 words
A magnetic recording media device having a wear-resistant and reduced-stiction fluorinated diamond-like carbon film as the uppermost protective layer.
Claim 3
Dependent Claim
34 words
A magnetic recording media device according to claim 1, wherein said device is selected from the group consisting of a magnetic recording disk, a magnetic read and write head, and other suitable recording devices.
Claim 4
Dependent Claim
36 words
A magnetic recording media device according to claim 1, wherein said film contains hydrogen at an atomic concentration between about 0 and about 40 atomic percent and preferably between about 0 and about 20 atomic percent.
Claim 5
Dependent Claim
37 words
A magnetic recording media device according to claim 1, wherein the atomic ratio of F/(F+C) in the film is between about 2 and about 70 atomic percent and preferably between about 10 and about 40 atomic percent.
Claim 6
Dependent Claim
35 words
A magnetic recording media device according to claim 1, wherein the thickness of said FDLC film is between about 4 nm and about 30 nm, and preferably between about 5 nm and about 10 nm.
Claim 7
Dependent Claim
36 words
A magnetic recording media device according to claim 1, wherein the wear resistance of said film is in the range between about 0.2 and about 1 of the wear resistance of a non-fluorinated diamond-like carbon film.
Claim 8
Dependent Claim
22 words
A magnetic recording media device according to claim 1, wherein said FDLC film is deposited directly on the surface to be protected.
Claim 9
Dependent Claim
27 words
A magnetic recording media device according to claim 1, wherein an intermediate diamond-like carbon film is deposited between the FDLC film and the surface to be protected.
Claim 10
Dependent Claim
34 words
A magnetic recording media device according to claim 8, wherein the thickness of said DLC film is between about 2 nm and about 10 nm, and preferably between about 3 nm and 5 nm.
Claim 11
Dependent Claim
35 words
A magnetic recording media device according to claim 8, wherein the thickness of said FDLC film is between about 3 nm and about 30 nm, and preferably between about 5 nm and about 7 nm.
Claim 12
Dependent Claim
36 words
A magnetic recording media device comprising: a support structure having a magnetic material coated on its top surface, and a protective coating of a fluorinated diamond-like carbon material covering the uppermost surface of said magnetic material.
Claim 13
Dependent Claim
36 words
A magnetic recording media device comprising: a support structure having a magnetic material coated on its top surface, and a protective coating of a fluorinated diamond-like carbon material covering the uppermost surface of said magnetic material.
Claim 14
Dependent Claim
33 words
A magnetic recording media device according to claim 11, wherein said device is selected from the group consisting of a magnetic recording disk, a magnetic read and write head, and other suitable devices.
Claim 15
Dependent Claim
29 words
A magnetic recording media device according to claim 11, wherein an intermediate diamond-like carbon film is deposited between said FDLC film and the uppermost surface of said magnetic material.
Claim 16
Dependent Claim
35 words
A magnetic recording media device according to claim 11, wherein the thickness of said FDLC film is between about 3 nm and about 30 nm, and preferably between about 5 nm and about 10 nm.
Claim 17
Independent Claim
55 words
A method of making a magnetic recording media device comprising the steps of: depositing a magnetically active material on a support structure, said magnetically active material capable of storing information or read and write information, and depositing a protective coating of a fluorinated diamond-like carbon film on the uppermost surface of said magnetically active material.
Claim 18
Independent Claim
55 words
A method of making a magnetic recording media device comprising the steps of: depositing a magnetically active material on a support structure, said magnetically active material capable of storing information or read and write information, and depositing a protective coating of a fluorinated diamond-like carbon film on the uppermost surface of said magnetically active material.
Claim 19
Dependent Claim
30 words
A method of making a magnetic recording media device according to claim 15, wherein the thickness of said FDLC film deposited is between about 3 nm and about 30 nm.
Claim 20
Dependent Claim
45 words
A method of making a magnetic recording media device according to claim 15 further comprising the step of first depositing an intermediate DLC film on the uppermost surface of said magnetically active material and then depositing a FDLC film on top of said DLC film.
References Cited (Backward Citations)
US4647494A
Cited
US5159508A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-10-30 | 1999-05-01 | 1999-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-30 | 2003-05-01 | 2003-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-10-30 | 2007-05-01 | 2007-10-31 | $7700.00 | Window Closed / Lapsed |