EP0307750A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Use of a storage meedium in a method of recording information
Assignee: Toshiba Corp
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Filing: 1988-09-05
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Granted: —
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Expires: 2008-09-05
Abstract
Abstract An optical disk comprises a polycarbonate substrate (11), a first protective layer (12) formed on the substrate (11) and made of SiO₂, a recording layer (13) formed on the first protective layer (12) and made of an In-Sb-Te alloy, a second protective layer (14), formed on the recording layer (13) and made of SiO₂, and a surface protective layer (15) formed on the second protective layer (14) and made of an ultraviolet curable resin. The recording layer (13) has a composition of (In 100-x Sb x ) 100-y Te y , wherein x and y are in atomic % and x falls within a range of 48 ≦ x ≦ 52 and y falls within a range of 0.05 ≦ y ≦ 5.
Inventors
- 👤 Katsumi C/O Patent Division Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 17:40
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/243; G11B7/2433; G11B7/252; G11B7/254; G11B2007/24302; G11B2007/2431; G11B2007/24314; G11B2007/24316; G11B7/253; G11B7/2533; G11B7/2534; G11B7/2542
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
86 words
An information storage medium comprising: a substrate (11); and a recording layer (13) supported on said substrate and subjected to reversible phase transformation between different phases by changing conditions under which a light beam is radiated, characterized in that said recording layer (13) contains an (In 100-x Sb x ) 100-y Te y alloy, wherein x and y are in atomic % and x falls within a range of 48 ≦ x ≦ 52 and y falls within a range of 0.05 ≦ y ≦ 5.
Claim 2
Dependent Claim
86 words
An information storage medium comprising: a substrate (11); and a recording layer (13) supported on said substrate and subjected to reversible phase transformation between different phases by changing conditions under which a light beam is radiated, characterized in that said recording layer (13) contains an (In 100-x Sb x ) 100-y Te y alloy, wherein x and y are in atomic % and x falls within a range of 48 ≦ x ≦ 52 and y falls within a range of 0.05 ≦ y ≦ 5.
Claim 3
Dependent Claim
25 words
A medium according to claim 1, characterized by further comprising a first protective layer (12) interposed between said substrate (11) and said recording layer (13).
Claim 4
Dependent Claim
21 words
A medium according to claim 2, characterized by further comprising a second protective layer (14) disposed on said recording layer (13).
Claim 5
Dependent Claim
21 words
A medium according to claim 3, characterized by further comprising a surface layer (15) disposed on said second protective layer (14).
Claim 6
Dependent Claim
21 words
A medium according to claim 3, characterized in that said first and second protective layers (12, 14) contain a dielectric material.
Claim 7
Dependent Claim
16 words
A medium according to claim 4, characterized in that said surface layer (15) contains a resin.
Claim 8
Dependent Claim
52 words
An information storage medium comprising: a substrate (11); and a recording layer (13) supported on said substrate, said recording layer (13) subjected to reversible phase transformation between a crystal phase and a mixed phase wherein crystal grains exist in an amorphous phase by changing conditions under which a light beam is radiated.
Claim 9
Dependent Claim
52 words
An information storage medium comprising: a substrate (11); and a recording layer (13) supported on said substrate, said recording layer (13) subjected to reversible phase transformation between a crystal phase and a mixed phase wherein crystal grains exist in an amorphous phase by changing conditions under which a light beam is radiated.
Claim 10
Dependent Claim
48 words
A medium according to claim 7, characterized by further comprising a first protective layer (12) interposed between said substrate (11) and said recording layer (13), a second protective layer (14) disposed on said recording (13) layer, and a surface layer (15) disposed on said second protective layer (14).
Claim 11
Dependent Claim
29 words
A medium according to claim 8, characterized in that said first and second protective layers (12, 14) contain a dielectric material and said surface layer (15) contains a resin.
Claim 12
Dependent Claim
55 words
A medium according to claim 7, characterized in that said recording layer contains an (In 100-x Sb x ) 100-y Te y alloy, wherein x and y are in atomic % and x falls within a range of 48 ≦ x ≦ 52 and y falls within a range of 0.05 ≦ y ≦ 5.
Claim 13
Independent Claim
68 words
A method of manufacturing an information storage medium comprising steps of: preparing a substrate; and forming a recording layer on said substrate, said recording layer containing an (In 100-x Sb x ) 100-y Te y alloy, wherein x and y are in atomic % and x falls within a range of 48 ≦ x ≦ 52 and y falls within a range of 0.05 ≦ y ≦ 5.
Claim 14
Independent Claim
68 words
A method of manufacturing an information storage medium comprising steps of: preparing a substrate; and forming a recording layer on said substrate, said recording layer containing an (In 100-x Sb x ) 100-y Te y alloy, wherein x and y are in atomic % and x falls within a range of 48 ≦ x ≦ 52 and y falls within a range of 0.05 ≦ y ≦ 5.
Claim 15
Dependent Claim
25 words
A method according to claim 11, characterized by further comprising a step of forming a first protective layer between said substrate and said recording layer.
Claim 16
Dependent Claim
22 words
A method according to claim 12, characterized by further comprising a step of forming a second protective layer on said recording layer.
Claim 17
Dependent Claim
22 words
A method according to claim 13, characterized by further comprising a step of forming a surface layer on said second protective layer.
Claim 18
Dependent Claim
19 words
A method according to claim 13, characterized in that said first and second protective layers contain a dielectric material.
Claim 19
Dependent Claim
15 words
A method according to claim 14, characterized in that said surface layer contains a resin.
References Cited (Backward Citations)
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