Patent US4788561A successfully refreshed from Google Patents.
US4788561A
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Optical recording carrier
Assignee: Panasonic Holdings Corp
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Filing: 1988-04-01
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Granted: 1988-11-29
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Expires: 2008-04-01
Abstract
Abstract The invention relates to an optical recording carrier wherein a recording laser beam or the like is focused onto a recording material so that information signals are recorded thereon. It is one aspect of this invention to provide an optical recording carrier wherein a single Te element crystal layer having a thickness of 50 to 300 Å is formed between a substrate and an optical recording layer containing Te or TeOx (0<×<2) as a main component and at least one selected from the group consisting of 0-20 at % Se, 0-15 at % C, 0-10 at % Sb, 0-5 at % Au, 0-5 at % Ag, 0-10 at % Pd, 0-5 at % As, 0-5 at % Ge, 0-5 at % S, 0-5 at % Si, and 0-3 at % Ni.
Inventors
- 👤 Seiji Nishino
- 👤 Yuzo Takada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:21
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/26; G11B7/266; G11B7/241; G11B7/242; G11B7/243; G11B7/2433; G11B7/252; G11B7/257; G11B2007/24302; G11B2007/24316; G11B7/004; G11B7/0045; G11B7/00454
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
141 words
An optical recording carrier comprising: a substrate; a layer of an amorphous phase made of an optical recording material containing one of Te and TeO x (0×2) as a main component, said amorphous phase being changed to a crystalline phase by the irradiation of a laser beam or the like on said amorphous phase layer, thereby recording information on the optical recording material, and a Te metal layer of a crystalline phase having a thickness of 50 to 300 Å, said Te metal layer being provided between the substrate and the optical recording material layer and being in direct contact with the optical recording material layer such that said Te metal crystalline layer accelerates the phase change of the optical recording material from said amorphous phase to said crystalline phase to facilitate said recording of information on the optical recording material.
Claim 2
Dependent Claim
141 words
An optical recording carrier comprising: a substrate; a layer of an amorphous phase made of an optical recording material containing one of Te and TeO x (0×2) as a main component, said amorphous phase being changed to a crystalline phase by the irradiation of a laser beam or the like on said amorphous phase layer, thereby recording information on the optical recording material, and a Te metal layer of a crystalline phase having a thickness of 50 to 300 Å, said Te metal layer being provided between the substrate and the optical recording material layer and being in direct contact with the optical recording material layer such that said Te metal crystalline layer accelerates the phase change of the optical recording material from said amorphous phase to said crystalline phase to facilitate said recording of information on the optical recording material.
Claim 3
Dependent Claim
80 words
An optical recording carrier according to claim 1, wherein said layer of said optical recording material contains Te or TeOx (0<x<2) as a main component and at least one selected from the group consisting of 0-20 at % Se, 0-15 at % C, 0-10 at % Sb, 0-5 at % Au, 0-5 at % Ag, 0-10 at % Pd, 0-5 at % As, 0-5 at % Ge, 0-5 at % S, 0-5 at % Si, and 0-3 at % Ni.
Claim 4
Dependent Claim
120 words
An optical recording carrier according to claim 1, wherein said layer of said optical recording material is formed of an amorphous substance containing Te or TeO x (0<x<2) as a main component and at least one selected from the group consisting of 0-20 at % Se, 0-15 at % C, 0-10 at % Sb, 0-5 at % Au, 0-5 at % Ag, 0-10 at % Pd, 0-5 at % As, 0-5 at % Ge, 0-5 at % S, 0-5 at % Si, and 0-3 at % Ni, said recording material layer being changed from the amorphous phase to the crystal phase by the irradiation of a laser beam of the like on said layer so that information is recorded thereon.
Claim 5
Dependent Claim
19 words
The optical recording carrier as in claim 1, wherein said optical recording material contains Te as a main component.
Claim 6
Dependent Claim
20 words
The optical recording carrier as in claim 1, wherein said optical recording material contains TeOx (0<x<2) as a main component.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |