Patent EP0176865A1 successfully refreshed from Google Patents.
US4433340A
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US
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Optical recording medium
Assignee: Toshiba Corp
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Filing: 1982-03-22
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Granted: 1984-02-21
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Expires: 2002-03-22
Abstract
Abstract Disclosed is an optical recording medium. This optical recording medium has a substrate made of a transparent material such as an acrylic resin; and a recording layer for receiving an energy beam such as a laser beam whose intensity is changed in response to quantized information and for receiving desired information by melt-deforming in response to the intensity of the energy beam. The recording layer contains tellurium as a base material and carbon at a predetermined content of 40 atomic percent.
Inventors
- 👤 Masao Mashita
- 👤 Nobuaki Yasuda
- 👤 Tomoyuki Ishibshi, deceased
- 👤 legal representative Satoshi Ishibashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:39
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/252; G11B7/258; G11B7/004; G11B7/0045; G11B7/00451; G11B7/2403; G11B7/24053; G11B7/242; G11B7/243; G11B2007/24302; G11B2007/24316; G11B2007/24318; G11B2007/24328; G11B7/257; G11B2007/25705; G11B2007/25706; G11B7/253; G11B7/2531; G11B7/2533; G11B7/254; G11B7/2542; G11B7/2578; Y; Y10; Y10S; Y10S430/00; Y10S430/146; Y10S430/165
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
70 words
An optical recording medium comprising: recording layer means including a mixture layer containing tellurium as a base material and at least carbon at a predetermined ratio, for receiving an energy beam such as a laser beam whose intensity is changed in accordance with quantized information and for recording desired information by melt-deforming in response to the intensity of the energy beam, and substrate means for supporting said recording layer means.
Claim 2
Dependent Claim
70 words
An optical recording medium comprising: recording layer means including a mixture layer containing tellurium as a base material and at least carbon at a predetermined ratio, for receiving an energy beam such as a laser beam whose intensity is changed in accordance with quantized information and for recording desired information by melt-deforming in response to the intensity of the energy beam, and substrate means for supporting said recording layer means.
Claim 3
Dependent Claim
29 words
An optical recording medium according to claim 1, wherein a content of carbon in said mixture layer of said recording layer means is about 5 to 50 atomic percent.
Claim 4
Dependent Claim
25 words
An optical recording medium according to claim 2, wherein a content of carbon in said mixture layer is preferably about 10 to 40 atomic percent.
Claim 5
Dependent Claim
19 words
An optical recording medium according to claim 1, wherein said recording layer means is formed on said substrate means.
Claim 6
Dependent Claim
29 words
An optical recording medium according to claim 4, wherein said substrate means is made of a transparent material selected from the group consisting of glass and a synthetic resin.
Claim 7
Dependent Claim
17 words
An optical recording medium according to claim 4, wherein said recording layer means comprises said mixture layer.
Claim 8
Dependent Claim
39 words
An optical recording medium according to claim 4, wherein said recording layer means further comprises a substantially pure tellurium layer, said tellurium layer being formed on said substrate means and said mixture layer being formed on said tellurium layer.
Claim 9
Dependent Claim
37 words
An optical recording medium according to claim 4, wherein said recording layer means further comprises a metal layer, said mixture layer being formed on said substrate means and said metal layer being formed on said mixture layer.
Claim 10
Dependent Claim
44 words
An optical recording medium according to claim 8, wherein said metal layer is made of one metal selected from the group consisting of tellurium and bismuth and, said metal layer has a thickness in a range of several hundred Å to several thousand Å.
Claim 11
Dependent Claim
21 words
An optical recording medium according to claim 9, wherein said metal layer preferably has a thickness of less than 1000 Å.
Claim 12
Dependent Claim
33 words
An optical recording medium according to claim 1, further comprising layer means interposed between said recording layer means and said substrate means, for chemically insulating said recording layer means from said substrate means.
Claim 13
Dependent Claim
19 words
An optical recording medium according to claim 11, wherein said layer means comprises a physically and chemically stable material.
Claim 14
Dependent Claim
18 words
An optical recording medium according to claim 11, wherein said substrate means is made of a synthetic resin.
Claim 15
Dependent Claim
33 words
An optical recording medium according to claim 11, wherein said recording layer means further comprises a substantially pure tellurium layer, said tellurium layer being sandwiched by said mixture layer and said layer means.
Claim 16
Dependent Claim
28 words
An optical recording medium according to claim 1, further comprising a protection layer made of an organic material, said protection layer being formed on said recording layer means.
Claim 17
Dependent Claim
22 words
An optical recording medium according to claim 15, wherein said organic protection layer has a thickness of 1 μm to 10 mm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |