EP0046413A2
Expired / Lapsed
EP
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Recording medium
Assignee: Hitachi Ltd
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Filing: 1981-08-19
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Granted: —
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Expires: 2001-08-19
Abstract
Abstract A recording medium has a substrate 1 and formed thereon an inorganic material layer 2 adapted to absorb light to generate heat and an organic material recording layer 4 adapted to be deformed or removed by the heat. To give the recording medium stability against changes in ambient temperature, an intermediate layer 3 is located between the inorganic material layer 2 and the recording layer 4. The intermediate layer is made of an organic material containing metal, e.g. a metal salt of an organic acid, an organometallic compound, etc.
Inventors
- 👤 Munehisa Mitsuya
- 👤 Motoyasu Terao
- 👤 Sakae Ota
- 👤 Yoshio Taniguchi
- 👤 Toshimitsu Kaku
- 👤 Shinkichi Horigome
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 06:13
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/24; G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/252; G11B7/257; G11B7/2572; G11B7/2575; B41M5/26; B41M5/40; B41M5/42; G11B7/242; G11B7/244
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
87 words
A recording medium comprising a substrate (1), an inorganic material layer (2) formed on said substrate (1) and adapted to absorb light and thereby generate heat, and an organic material recording layer (4) formed on said inorganic material layer and adapted to be locally deformed or removed by the said heat generated in the inorganic material layer (1), characterised by an intermediate layer (3) which is located between said inorganic material layer (1) and said recording layer (4) and is made of an organic material containing metal.
Claim 2
Dependent Claim
87 words
A recording medium comprising a substrate (1), an inorganic material layer (2) formed on said substrate (1) and adapted to absorb light and thereby generate heat, and an organic material recording layer (4) formed on said inorganic material layer and adapted to be locally deformed or removed by the said heat generated in the inorganic material layer (1), characterised by an intermediate layer (3) which is located between said inorganic material layer (1) and said recording layer (4) and is made of an organic material containing metal.
Claim 3
Dependent Claim
31 words
A recording medium according to claim 1 wherein said intermediate layer (3) is made of at least one organic material selected from metal salts of organic acids, alkoxides, and organometallic compounds.
Claim 4
Dependent Claim
34 words
A recording medium according to claim 2 wherein said intermediate layer is made of at least one metal salt selected from metal salts of carboxylic acids, sulfonic acids, sulfinic acids, phenols, enols and thiophenols.
Claim 5
Dependent Claim
49 words
A recording medium according to claim 3 wherein the metal of the or each said metal salt is selected from Li, Na, K, Rb, Cs, Cu, Ag, Au, Be, Mg, Ca, Sr, Ba, Zn, Cd, Hg, B, Al, Ga, Ge, Sn, Pb, Co, Fe, Ni, Cr, Ti and Mn.
Claim 6
Dependent Claim
36 words
A recording medium according to any one of claims 1 to 4, wherein said intermediate layer (3) is made of an organic material with a melting point or softening point in the range 60 - 400°C.
Claim 7
Dependent Claim
27 words
A recording medium according to any one of claims 1 to 5 wherein said intermediate layer (3) has a thickness in the range 1 - 50 nm.
Claim 8
Dependent Claim
78 words
A recording medium according to any one of the preceding claims wherein said inorganic material layer (2) is made of a material represented by the general formula A x B y , where A is at least one of In, Bi, Te, Sb, Pb, Ge and Sn, B is at least one of S, Se and 0 and x and y as atomic percentages are given by 65 ≤ x ≤ 100 and 0 ≤ y ≤ 35.
Claim 9
Dependent Claim
28 words
A recording medium according to any one of the preceding claims wherein the thickness of said inorganic material layer (2) is in the range 20 - 300 nm.
Claim 10
Dependent Claim
34 words
A recording medium according to any one of the preceding claims wherein said recording layer (4) is made of an organic material with a melting or softening point in the range 60 - 200°C.
Claim 11
Dependent Claim
51 words
A recording medium according to any one of the preceding claims wherein said recording layer (4) is made of at least one material selected from hydrocarbons, halogen derivatives of hydrocarbons, alcohols, esters, aldehydes, ketones, nitro compounds, nitroso compounds, amino compounds, carboxylic acids, spiro compounds, heterocyclic compounds, natural resins and synthetic resins.
Claim 12
Dependent Claim
26 words
A recording medium according to any one of the preceding claims wherein said recording layer (4) has a thickness in the range 20 - 200 nm.
Claim 13
Dependent Claim
98 words
A recording medium according to any one of the preceding claims wherein an inorganic material intermediate layer is located between said inorganic material layer (2) and said organic material intermediate layer, said inorganic material intermediate layer being made of a material represented by the general formula of D s E t , where D is at least one of In, Bi, Te, Sb, Fb, Ge and Sn, E is at least one of S, Se and 0 and s and t as atomic percentages are given by 25 ≤ s < 60 and 40 < t ≤ 75.
Claim 14
Dependent Claim
23 words
A recording medium according to claim 12, wherein said inorganic material intermediate layer has a thickness in the range 10 - 300 nm.
Claim 15
Dependent Claim
57 words
A recording medium according to any one of the preceding claims wherein a third organic material layer is formed on said recording layer (4), said third organic material layer being made of an organic material which has a melting or softening point higher than the melting or softening point of the material of said recording layer (4).
Claim 16
Dependent Claim
31 words
A recording medium according to claim 14 wherein said third organic material layer has a thickness of at least 1 nm but not more than that of said recording layer (4).
References Cited (Backward Citations)
No citation records indexed.
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