Patent US5021276A successfully refreshed from Google Patents.
US5021276A
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Optical data recording medium and manufacturing method thereof
Assignee: Maxell Ltd
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Filing: 1989-06-19
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Granted: 1991-06-04
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Expires: 2009-06-19
Abstract
Abstract An optical data recording medium having a recording layer with or without an underlayer layered on a transparent substrate, wherein said recording layer is composed of a difficult-to-dissolve-in-water organic dye type material on which a thin layer composed of a surface active polymer as a hydrophilic material, which is denaturated by cross-linking.
Inventors
- 👤 Hisamitsu Kamezaki
- 👤 Masashi Suenaga
- 👤 Osamu Saito
- 👤 Shin-ichiro Iuchi
- 👤 Hitoshi Watanabe
- 👤 Hideo Fujiwara
- 👤 Yoshitane Tuburaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:34
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/252; G11B7/257; G11B7/2572; G11B7/2575; G11B7/242; G11B7/244; G11B7/246; G11B7/247; G11B7/2472; G11B7/2463; G11B7/2467; G11B7/248; G11B7/249; G11B7/253; G11B7/2533; G11B7/2534; G11B7/254; G11B7/2542; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
81 words
An optical data recording medium comprising a transparent substrate, a recording layer provided on said substrate, and a thin layer formed on said recording layer with or without an underlayer interposed between said recording layer and said substrate, both of said recording layer and thin layer being applied by a spin coating method, said recording layer being composed of an organic dye recording material substantially insoluble and non-dispersible in water and said thin layer being composed of a water soluble polymer.
Claim 2
Dependent Claim
81 words
An optical data recording medium comprising a transparent substrate, a recording layer provided on said substrate, and a thin layer formed on said recording layer with or without an underlayer interposed between said recording layer and said substrate, both of said recording layer and thin layer being applied by a spin coating method, said recording layer being composed of an organic dye recording material substantially insoluble and non-dispersible in water and said thin layer being composed of a water soluble polymer.
Claim 3
Dependent Claim
21 words
An optical recording medium according to claim 1, wherein said thin layer has a film thickness or 10 nm or greater.
Claim 4
Dependent Claim
16 words
An optical data recording medium according to claim 1, wherein said thin layer comprises polyvinyl alcohol.
Claim 5
Dependent Claim
20 words
An optical data recording medium according to claim 1, wherein an overcoat layer is further provided on said thin layer.
Claim 6
Dependent Claim
17 words
An optical data recording medium according to claim 4, wherein said overcoat layer comprises an acrylate resin.
Claim 7
Dependent Claim
26 words
An optical data recording medium according to claim 1, wherein said thin layer comprises a material of a water soluble polymer made water insoluble by denaturation.
Claim 8
Dependent Claim
23 words
An optical data recording medium according to claim 1, wherein said organic dye comprises an indol type cyanine dye having a methyne chain.
Claim 9
Dependent Claim
240 words
An optical data recording medium according to claim 7, wherein said organic dye has the following general formula: ##STR20## wherein ○T is a carbon chain to form a methyne chain and composed of a linear chain or a polycyclic compound of C 3 -C 17 , and a hydrogen atom attached to a carbon atom may be substrated by a halogen atom, ##STR21## (R" is a linear chain of C 1 -C 6 or an aromatic ring); A may be equal to or different from A', both of them representing an aromatic ring, respectively, and said hydrogen atom attached to a carbon atom may be substrated by --I, --Br, --Cl, --C n H 2n+1 (n=1-22), --OCH 3 , ##STR22## --NO 2 , and ##STR23## (R'" is a linear chain of a hydrocarbon or an aromatic ring); B may be equal to or different from B' and both of them represent --O--, --S--, --Se--, --CH═CH--, or ##STR24## (R"" is an alkyl group of C 1 -C 4 ); R may be equal to or different from R', both of them represent an alkyl group of C 1 -C 22 and may be substrated by a sulfonyl group or a carboxyl group; X.sup.⊖ represents an anion such as I.sup.⊖, PF 6 .sup.⊖, ClO 4 .sup.⊖, Cl.sup.⊖, CF 4 .sup.⊖ or the like; and m and n represent 0 or an integer of 1 through 3, respectively, and have a relationship of m+n≦3.
Claim 10
Dependent Claim
18 words
An optical data recording medium according to claim 7 or 3, wherein said anion is a hexafluoro-phosphate ion.
Claim 11
Dependent Claim
17 words
An optical data recording medium according to claim 8, wherein T in said general formula is ##STR25##
Claim 12
Dependent Claim
19 words
An optical data recording medium according to claim 8, wherein A and A' in said general formula are ##STR26##
Claim 13
Dependent Claim
19 words
An optical data recording medium according to claim 8, wherein B and B' in said general formula are ##STR27##
Claim 14
Dependent Claim
36 words
An optical data recording medium according to claim 8, wherein R and R' in said general formula are the same alkyl group and may be either C 2 H 5 or C 3 H 7 .
Claim 15
Dependent Claim
42 words
An optical data recording medium according to claim 7, wherein ○T in said general formula is ##STR28## A and A' are ##STR29## B and B' are ##STR30## R and R' are C 2 H 5 , and X.sup.⊖ is PF 6 .sup.⊖.
Claim 16
Dependent Claim
19 words
An optical data recording medium according to claim 6, wherein said thin layer is cross-linked or a crystallized layer.
Claim 17
Dependent Claim
20 words
An optical data recording medium according to claim 6, wherein an overcoat layer is further provided on said thin layer.
Claim 18
Dependent Claim
17 words
An optical data recording medium according to claim 16, wherein said overcoat layer comprises an acrylate resin.
Claim 19
Dependent Claim
37 words
An optical data recording medium according to claim 16, wherein said thin layer and said overcoat layer are water resistant and heat resistant having been cross-linked or polymerized by an irradiation of ultraviolet rays or the like.
Claim 20
Dependent Claim
58 words
An optical data recording medium produced according to the process which comprises: providing a transparent substrate; applying a recording layer of a material comprising an organic dye which is substantially insoluble and non-dispersible in water by spin coating; and applying a thin layer of a material comprising a water soluble polymer by spin coating on said recording layer.
Claim 21
Dependent Claim
58 words
An optical data recording medium produced according to the process which comprises: providing a transparent substrate; applying a recording layer of a material comprising an organic dye which is substantially insoluble and non-dispersible in water by spin coating; and applying a thin layer of a material comprising a water soluble polymer by spin coating on said recording layer.
Claim 22
Dependent Claim
25 words
An optical data recording medium produced according to the process of claim 19, further including interposing a underlayer between said substrate and said recording layer.
Claim 23
Dependent Claim
23 words
An optical data recording medium produced according to the process of claim 19, further including providing an overcoat layer over said thin layer.
Claim 24
Dependent Claim
32 words
An optical data recording medium produced according to the process of claim 19, further including the step of cross-linking or crystallizing said thin layer to impart thereto water resistance or heat resistance.
Claim 25
Dependent Claim
34 words
An optical data recording medium produced according to the process of claim 21, further including cross-linking or polymerizing said thin layer and said overcoat layer to impart thereto heat resistance and water resistance properties.
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