Patent US4900598A successfully refreshed from Google Patents.
US4900598A
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Information storage medium
Assignee: Toshiba Corp
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Filing: 1988-09-06
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Granted: 1990-02-13
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Expires: 2008-09-06
Abstract
Abstract An optical disk comprises a polycarbonate substrate, a first protective layer, formed on the substrate and made of SiO 2 , a recording layer, formed on the first protective layer and made of an In-Sb-Te alloy, a second protective layer, formed on the recording layer and made of SiO 2 , and a surface protective layer, formed on the second protective layer and made of an ultraviolet curable resin. The recording layer has a composition of In 50-x Sb 50 Te y Au Z wherein x, y, and z are in atomic %, x=y+z, y≧2z, and 1≦x≦6), In 50-x Sb 50-x Te y Au z (wherein 2x=y+z and 0<x≦10), or (In 100-x Sb x ) 100-y-z Te y Au z (wherein 48≦x≦52 and 0.05≦y+z≦5).
Inventors
- 👤 Katsumi Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:28
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/252; G11B7/257; G11B7/242; G11B7/243; G11B7/254; G11B2007/24302; G11B2007/24308; G11B2007/2431; G11B2007/24314; G11B2007/24316; G11B7/2542; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/146; Y10T; Y10T428/00; Y10T428/23; Y10T428/239; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
62 words
An information storage medium comprising: a substrate; and a recording layer supported on said substrate and subjected to reversible phase transformation between different phases by changing conditions under which a light beam is radiated, said recording layer containing an In 50-x Sb 50 Te y Au z alloy (wherein x, y, and z are in atomic %, x=y+z, y ≧2z, and 1≦x≦6).
Claim 2
Dependent Claim
62 words
An information storage medium comprising: a substrate; and a recording layer supported on said substrate and subjected to reversible phase transformation between different phases by changing conditions under which a light beam is radiated, said recording layer containing an In 50-x Sb 50 Te y Au z alloy (wherein x, y, and z are in atomic %, x=y+z, y ≧2z, and 1≦x≦6).
Claim 3
Dependent Claim
20 words
A medium according to claim 1, further comprising a first protective layer, interposed between said substrate and said recording layer.
Claim 4
Dependent Claim
17 words
A medium according to claim 2, further comprising a second protective layer, disposed on said recording layer.
Claim 5
Dependent Claim
17 words
A medium according to claim 3, further comprising a surface layer disposed on said second protective layer.
Claim 6
Dependent Claim
17 words
A medium according to claim 3 wherein said first and second protective layers contain a dielectric material.
Claim 7
Dependent Claim
13 words
A medium according to claim 4, wherein said surface layer contains a resin.
Claim 8
Dependent Claim
60 words
An information storage medium comprising: a substrate; and a recording layer supported on said substrate and subjected to reversible phase transformation between different phases by changing conditions under which a light beam is radiated, said recording layer containing an In 50-x Sb 50-x Te y Au z alloy (wherein x, y, and z are in atomic %, 2x=y+z, and 0<x≦10).
Claim 9
Dependent Claim
60 words
An information storage medium comprising: a substrate; and a recording layer supported on said substrate and subjected to reversible phase transformation between different phases by changing conditions under which a light beam is radiated, said recording layer containing an In 50-x Sb 50-x Te y Au z alloy (wherein x, y, and z are in atomic %, 2x=y+z, and 0<x≦10).
Claim 10
Dependent Claim
20 words
A medium according to claim 7, further comprising a first protective layer, interposed between said substrate and said recording layer.
Claim 11
Dependent Claim
17 words
A medium according to claim 8, further comprising a second protective layer, disposed on said recording layer.
Claim 12
Dependent Claim
17 words
A medium according to claim 9, further comprising a surface layer disposed on said second protective layer.
Claim 13
Dependent Claim
17 words
A medium according to claim 9, wherein said first and second protective layers contain a dielectric material.
Claim 14
Dependent Claim
13 words
A medium according to claim 10, wherein said surface layer contains a resin.
Claim 15
Dependent Claim
61 words
An information storage medium comprising: a substrate; and a recording layer supported on said substrate and subjected to reversible phase transformation between different phases by changing conditions under which a light beam is radiated, said recording layer containing an (In 100-x Sb x ) 100-y-z Te y Au z alloy (wherein x, y, and z are in atomic % and 0.05≦y+z≦5).
Claim 16
Dependent Claim
61 words
An information storage medium comprising: a substrate; and a recording layer supported on said substrate and subjected to reversible phase transformation between different phases by changing conditions under which a light beam is radiated, said recording layer containing an (In 100-x Sb x ) 100-y-z Te y Au z alloy (wherein x, y, and z are in atomic % and 0.05≦y+z≦5).
Claim 17
Dependent Claim
39 words
A medium according to claim 13, further comprising a first protective layer, interposed between said substrate and said recording layer, a second protective layer, disposed on said recording layer, and a surface layer disposed on said second protective layer.
Claim 18
Dependent Claim
24 words
A medium according to claim 14, wherein said first and second protective layers contain a dielectric material, and said surface layer contains a resin.
References Cited (Backward Citations)
US3530441A
Cited
US4565772A
Cited
EP0121426A2
Cited
EP0165440A2
Cited
US4702991A
Cited
EP0184452A2
Cited
US4668573A
Cited
US4647944A
Cited
JPH02137740A
Cited
JPH02239339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-02-12 | 1993-08-14 | 1994-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-12 | 1997-08-14 | 1998-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-12 | 2001-08-14 | 2002-02-13 | $7700.00 | Window Closed / Lapsed |