US4839207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical recording medium and process for producing the same
Assignee: Mitsubishi Chemical Corp
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Filing: 1988-02-16
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Granted: 1989-06-13
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Expires: 2008-02-16
Abstract
Abstract Disclosed herein is an optical recording medium for recording informations by irradiating the optical recording medium with a laser beam to form a hole or a deformed part thereon, said optical recording medium comprising a substrate and a recording layer containing at least Te, Se and F in the amounts of from 35 to 94.9 atomic % of Te, from 5 to 25 atomic % of Se and from 0.1 to 40 atomic % of F, produced by a reactive sputtering, said Se being derived from selenium fluoride and a sputtering target of Te or a sputtering target comprising Te-Se-alloy, and a process for producing the same.
Inventors
- 👤 Toshihiko Yoshitomi
- 👤 Yoshimitsu Kobayashi
- 👤 Yoshiyuki Kisaka
- 👤 Hidemi Yoshida
- 👤 Michikazu Horie
- 👤 Takanori Tamura
- 👤 Mitsuaki Ohgaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:29
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/243; G11B2007/24302; G11B2007/24316; G11B2007/24318; G11B2007/24326; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/146; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/26; Y10T428/261; Y10T428/31; Y10T428/31504; Y10T428/31507; Y10T428/3154; Y10T428/31544; Y10T428/31678
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
109 words
An optical recording medium for recording informations by irradiating the optical recording medium with a laser beam to form a hole or a deformed part thereon, said optical recording medium comprising a substrate and a recording layer having a thickness of 150 to 1,000 Å containing at least Te, Se and F in the amounts of from 35 to 94.9 atomic % of Te, from 5 to 25 atomic % of Se and from 0.1 to 40 atomic % of F, produced by a reactive sputtering, said Se being derived from a gaseous mixture comprising 0.01 to 50% by volume of selenium fluoride and a sputtering target comprising Te-Se-alloy.
Claim 2
Dependent Claim
109 words
An optical recording medium for recording informations by irradiating the optical recording medium with a laser beam to form a hole or a deformed part thereon, said optical recording medium comprising a substrate and a recording layer having a thickness of 150 to 1,000 Å containing at least Te, Se and F in the amounts of from 35 to 94.9 atomic % of Te, from 5 to 25 atomic % of Se and from 0.1 to 40 atomic % of F, produced by a reactive sputtering, said Se being derived from a gaseous mixture comprising 0.01 to 50% by volume of selenium fluoride and a sputtering target comprising Te-Se-alloy.
Claim 3
Dependent Claim
63 words
An optical recording medium according to claim 1, wherein an underlayer comprising a fluorocarbon polymer is provided between said substrate and said recording layer, the atomic ratio of fluorine to carbon in the part of said underlayer in the surface of said underlayer, which the surface contacts to said recording layer being 0.9 to 1.8 as the measured value according to ESCA method.
Claim 4
Dependent Claim
27 words
An optical recording medium according to claim 2, wherein said underlayer comprising a fluorocarbon is a sputtered film of polytetrafluoroethylene or a plasma polymerized film of hexafluoropropylene.
Claim 5
Dependent Claim
73 words
An optical recording medium according to claim 2, wherein not less than 18% of carbon atoms in total carbon atoms at the surface of said underlayer, which the surface contacts to said recording layer, construct -F 3 group and from not less than 18% to less than 40% of carbon atoms in total carbon atoms at the surface of said underlayer, which the surface contacts to said recording layer, construct >CF 2 group.
Claim 6
Dependent Claim
61 words
An optical recording medium according to claim 1, wherein an underlayer comprising a chlorofluorocarbon polymer is disposed between said substrate and said recording layer, the atomic ratio of fluorine to carbon in the surface of said underlayer, which the surface contacts to said recording layer, being 0.9 to 1.4 and said surface containing from 5 to 15 atomic % of chlorine.
Claim 7
Dependent Claim
27 words
An optical recording medium according to claim 1, wherein the rate of said selenium fluoride gas in said gaseous mixture is from 0.1 to 50% by volume.
Claim 8
Dependent Claim
27 words
An optical recording medium according to claim 6, wherein the rate of said selenium fluoride gas in said gaseous mixture is from 1 to 50% by volume.
Claim 9
Dependent Claim
83 words
An optical recording medium for recording informations by irradiating the optical recording medium with a laser beam to form a hole or a deformed part thereon, said optical recording medium comprising a substrate and a recording layer containing at least Te, Se and F in the amounts of from 35 to 94.9 atomic % of Te, from 5 to 25 atomic % of Se and from 0.1 to 40 atomic % of F, produced by a reactive sputtering, using a target of Te.
Claim 10
Dependent Claim
83 words
An optical recording medium for recording informations by irradiating the optical recording medium with a laser beam to form a hole or a deformed part thereon, said optical recording medium comprising a substrate and a recording layer containing at least Te, Se and F in the amounts of from 35 to 94.9 atomic % of Te, from 5 to 25 atomic % of Se and from 0.1 to 40 atomic % of F, produced by a reactive sputtering, using a target of Te.
Claim 11
Dependent Claim
63 words
An optical recording medium according to claim 8, wherein an underlayer comprising a fluorocarbon polymer is provided between said substrate and said recording layer, the atomic ratio of fluorine to carbon in the part of said underlayer in the surface of said underlayer, which the surface contacts to said recording layer being 0.9 to 1.8 as the measured value according to ESCA method.
Claim 12
Dependent Claim
29 words
An optical recording medium according to claim 9, wherein said underlayer comprising a fluorocarbon is a sputtered film of polytetrafluoroethylene or a plasma polymerized film of hexafluoropropylene or tetrafluoroethylene.
Claim 13
Dependent Claim
73 words
An optical recording medium according to claim 9, wherein not less than 18% of carbon atoms in total carbon atoms at the surface of said underlayer, which the surface contacts to said recording layer, construct -F 3 group and from not less than 18% to less than 40% of carbon atoms in total carbon atoms at the surface of said underlayer, which the surface contacts to said recording layer, construct >CF 2 group.
Claim 14
Dependent Claim
61 words
An optical recording medium according to claim 8, wherein an underlayer comprising a chlorofluorocarbon polymer is disposed between said substrate and said recording layer, the atomic ratio of fluorine to carbon in the surface of said underlayer, which the surface contacts to said recording layer, being 0.9 to 1.4 and said surface containing from 5 to 15 atomic % of chlorine.
References Cited (Backward Citations)
JPS5331104A
Cited
JPS5331105A
Cited
US4348461A
Cited
US4385305A
Cited
US4451914A
Cited
JPS59103314A
Cited
US4592939A
Cited
EP0120539A1
Cited
JPS59221847A
Cited
US4719594A
Cited
US4735888A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |