US4767693A
Expired / Lapsed
US
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Optical information recording medium
Assignee: Ricoh Co Ltd
•
Filing: 1987-10-02
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Granted: 1988-08-30
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Expires: 2007-10-02
Abstract
Abstract This invention provides an optical information recording medium that has, on a substrate, a recording layer containing a cyanine dye represented by the general formula: ##STR1## (wherein, R 1 , R 2 and R 3 may be the same or different and each stands for a substituted or unsubstituted alkyl group; X stands for a perhalogenate ion, a toluenesulfonate ion or an alkylsulfate ion; n stands for an integrer of 0 or 1-3; a first halogen atom is present in at least one of each 4, 6 and 7-positions of the indole and indolenine rings; a second halogen atom may be present in each 5-position of said rings; and at lest one group consisting of alkyl, alkoxy, hydroxy, carboxy, allyl and alkylcarbonyl may be present in at least one of each 4, 5, 6 and 7-positions of said rings.) and, if necessary, a transition metal complex or a salt of said complex with a cation.
Inventors
- 👤 Hideaki Oba
- 👤 Yutaka Ueda
- 👤 Tsutomu Sato
- 👤 Masaakira Umehara
- 👤 Michiharu Abe
- 👤 Hitoshi Funakoshi
- 👤 Seiko Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:07
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/246; G11B7/247; G11B7/2472; G11B7/249; G11B7/252; G11B7/253; G11B7/2533; G11B7/256; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 65
Claim 1
Independent Claim
182 words
An optical information recording medium capable of recording and regenerating information with a laser beam, comprising: a substrate, a recording layer on said substrate, said recording layer having a thickness of from 100-1000 Angstroms and containing a cyanine dye represented by the general formula: ##STR17## wherein, R 1 and R 2 may be the same or different and each stands for a substituted or unsubstituted alkyl group; R 3 is substituted alkyl, unsubstituted alkyl or benzyl; X stands for perhalogenate ion, a toluenesulfonate ion or an alkylsulfate ion; n stands for an integer of 0 or 1-3; a first halogen atom is present in at least one of the 4, 6 and 7-positions of both of the indole and indolenine rings; a second halogen atom may optionally be present in the 5-position of both of said rings; and at least one substituent group selected from the group consisting of alkyl, alkoxy, hydroxy, carboxy, alkyl and alkylcarbonyl may optionally be present in at least one of the 4, 5, 6 and 7-positions of both of said rings wherein said recording contains no binder.
Claim 2
Dependent Claim
182 words
An optical information recording medium capable of recording and regenerating information with a laser beam, comprising: a substrate, a recording layer on said substrate, said recording layer having a thickness of from 100-1000 Angstroms and containing a cyanine dye represented by the general formula: ##STR17## wherein, R 1 and R 2 may be the same or different and each stands for a substituted or unsubstituted alkyl group; R 3 is substituted alkyl, unsubstituted alkyl or benzyl; X stands for perhalogenate ion, a toluenesulfonate ion or an alkylsulfate ion; n stands for an integer of 0 or 1-3; a first halogen atom is present in at least one of the 4, 6 and 7-positions of both of the indole and indolenine rings; a second halogen atom may optionally be present in the 5-position of both of said rings; and at least one substituent group selected from the group consisting of alkyl, alkoxy, hydroxy, carboxy, alkyl and alkylcarbonyl may optionally be present in at least one of the 4, 5, 6 and 7-positions of both of said rings wherein said recording contains no binder.
Claim 3
Dependent Claim
27 words
A recording medium according to claim 1, wherein both said second halogen atom and said at least one subitituent group are present in both of said rings.
Claim 4
Dependent Claim
19 words
A recording medium according to claim 1, wherein said second halogen atom is present in both of said rings
Claim 5
Dependent Claim
22 words
A recording medium according to claim 3, wherein said first halogen atom is present in the 7-position of both of said rings.
Claim 6
Dependent Claim
16 words
A recording medium according to claim 1, wherein said recording layer consists of said cyanine dye.
Claim 7
Dependent Claim
15 words
A recording medium according to claim 1, wherein the recording layer further contains an antioxidant.
Claim 8
Dependent Claim
15 words
A recording medium according to claim 1, wherein the recording layer is 300-700 Å thick.
Claim 9
Dependent Claim
15 words
A recording medium according to claim 1, wherein the recording layer is 400-600 Å thick.
Claim 10
Dependent Claim
19 words
A recording medium according to claim 1, wherein the recording layer is formed by means of a coating method.
Claim 11
Dependent Claim
14 words
A recording medium according to claim 9, wherein said coating method is spin coating.
Claim 12
Dependent Claim
17 words
A recording medium according to claim 1, wherein said substrate is transparent to a writing laser beam.
Claim 13
Dependent Claim
14 words
A recording medium according to claim 1, wherein the substrate is made of plastic.
Claim 14
Dependent Claim
14 words
A recording medium according to claim 12, wherein said plastic is an acryl resin.
Claim 15
Dependent Claim
21 words
A recording medium according to claim 1, wherein the substrate itself is provided with a guide groove for a laser beam.
Claim 16
Dependent Claim
21 words
A recording medium according to claim 1, wherein an undercoat layer is further provided between the substrate and the recording layer.
Claim 17
Dependent Claim
32 words
A recording medium according to claim 15, wherein said undercoat layer is formed of one member selected from the group consisting of an ultraviolet-ray-setting resin, a thermo-setting resin and a thermo-plastic resin.
Claim 18
Dependent Claim
15 words
A recording medium according to claim 16, wherein said ultraviolet-ray-setting resin is an acryl resin.
Claim 19
Dependent Claim
15 words
A recording medium according to claim 15, wherein said undercoat layer has a guide groove.
Claim 20
Dependent Claim
15 words
A recording medium according to claim 15, wherein the undercoat layer is 0.1-30 μm thick.
Claim 21
Dependent Claim
15 words
A recording medium according to claim 19, wherein the undercoat layer is 0.2-10 μm thick.
Claim 22
Dependent Claim
18 words
A recording medium according to claim 1, wherein a protective layer is further provided on the recording layer.
Claim 23
Dependent Claim
15 words
A recording medium according to claim 21, wherein said protective layer is 0.1-1000 μm thick.
Claim 24
Dependent Claim
15 words
A recording medium according to claim 22, wherein the protective layer is 50-500 μm thick.
Claim 25
Dependent Claim
28 words
An optical information recording medium according to claim 1, in which said recording layer contains a transition metal complex or a salt of said complex with a cation.
Claim 26
Dependent Claim
25 words
A recording medium according to claim 24, wherein both second halogen atom and at least one substituent group are present in both of said rings.
Claim 27
Dependent Claim
19 words
A recording medium according to claim 24, wherein said second halogen atom is present in both of said rings.
Claim 28
Dependent Claim
22 words
A recording medium according to claim 26, wherein said first halogen atom is present in the 7-position of both of said rings.
Claim 29
Dependent Claim
30 words
A recording medium according to claim 24, wherein said recording layer consists of said cyanine dye and said transition metal complex or a salt of said complex with a cation.
Claim 30
Dependent Claim
23 words
A recording medium according to claim 24, wherein the mixing ratio of said complex to said cyanine dye is about 1/100-1/2 by weight.
Claim 31
Dependent Claim
23 words
A recording medium according to claim 29, wherein the mixing ratio of said complex to said cyanine dye is about 1/20-1/3 by weight.
Claim 32
Dependent Claim
20 words
A recording medium according to claim 24, wherein said complex is selected from the group consisting of bisdithio-2-diketones and bisphenyl-dithiols.
Claim 33
Dependent Claim
15 words
A recording medium according to claim 24, wherein the recording layer is 300-700 Å thick.
Claim 34
Dependent Claim
15 words
A recording medium according to claim 24, wherein the recording layer is 400-600 Å thick.
Claim 35
Dependent Claim
17 words
A recording medium according to claim 24, wherein the recording layer is formed by a coating method.
Claim 36
Dependent Claim
14 words
A recording medium according to claim 34, wherein said coating method is spin coating.
Claim 37
Dependent Claim
17 words
A recording medium according to claim 24, wherein the substrate is transparent to a writing laser beam.
Claim 38
Dependent Claim
14 words
A recording medium according to claim 24, wherein the substrate is made of plastic.
Claim 39
Dependent Claim
14 words
A recording medium according to claim 37, wherein said plastic is an acryl resin.
Claim 40
Dependent Claim
21 words
A recording medium according to claim 24, wherein the substrate itself is provided with a guide groove for a laser beam.
Claim 41
Dependent Claim
21 words
A recording medium according to claim 24, wherein an undercoat layer is further provided between the substrate and the recording layer.
Claim 42
Dependent Claim
32 words
A recording medium according to claim 40, wherein said undercoat layer is formed of one member selected from the group consisting of an ultraviolet-ray-setting resin, a thermo-setting resin and a thermo-plastic resin.
Claim 43
Dependent Claim
15 words
A recording medium according to claim 41, wherein said ultraviolet-setting resin is an acryl resin.
Claim 44
Dependent Claim
15 words
A recording medium according to claim 40, wherein the undercoat layer has a guide groove.
Claim 45
Dependent Claim
15 words
A recording medium according to claim 40, wherein the undercoat layer is 0.1-30 μm thick.
Claim 46
Dependent Claim
15 words
A recording medium according to claim 44, wherein the undercoat layer is 0.2-10 μm thick.
Claim 47
Dependent Claim
18 words
A recording medium according to claim 24, wherein a protective layer is further provided on the recording layer.
Claim 48
Dependent Claim
15 words
A recording medium according to claim 46, wherein said protective layer is 0.1-1000 μm thick.
Claim 49
Dependent Claim
15 words
A recording medium according to claim 41, wherein the protective layer is 50-500 μm thick.
Claim 50
Dependent Claim
21 words
A recording medium according to claim 1 wherein each of said alkyl and alkoxy have from 1 to 4 carbon atoms.
Claim 51
Dependent Claim
25 words
A recording medium according to claim 49 wherein said substituted alkyl is selected from the group consisting of hydroxyalkyl, aminoalkyl, halogenoalkyl, allylalkyl, alkoxyalkyl and acyloxyalkyl.
Claim 52
Dependent Claim
30 words
A recording medium according to claim 49 in which X - is ClO 4 .sup.⊖, CH3 ##STR18## C 2 H 5 SO 4 .sup.⊖ or CH 3 SO 4 .sup.⊖.
Claim 53
Dependent Claim
16 words
A recording medium according to claim 49 in which said cyanine dye has the formula ##STR19##
Claim 54
Dependent Claim
16 words
A recording medium according to claim 49 in which said cyanine dye has the formula ##STR20##
Claim 55
Dependent Claim
16 words
A recording medium according to claim 49 in which said cyanine dye has the formula ##STR21##
Claim 56
Dependent Claim
16 words
A recording medium according to claim 49 in which said cyanine dye has the formula ##STR22##
Claim 57
Dependent Claim
16 words
A recording medium according to claim 49 in which said cyanine dye has the formula ##STR23##
Claim 58
Dependent Claim
16 words
A recording medium according to claim 49 in which said cyanine dye has the formula ##STR24##
Claim 59
Dependent Claim
16 words
A recording medium according to claim 49 in which said cyanine dye has the formula ##STR25##
Claim 60
Dependent Claim
16 words
A recording medium according to claim 49 in which said cyanine dye has the formula ##STR26##
Claim 61
Dependent Claim
16 words
A recording medium according to claim 49 in which said cyanine dye has the formula ##STR27##
Claim 62
Dependent Claim
16 words
A recording medium according to claim 49 in which said cyanine dye has the formula ##STR28##
Claim 63
Dependent Claim
16 words
A recording medium according to claim 49 in which said cyanine dye has the formula ##STR29##
Claim 64
Dependent Claim
16 words
A recording medium according to claim 49 in which said cyanine dye has the formula ##STR30##
Claim 65
Dependent Claim
16 words
A recording medium according to claim 49 in which said cyanine dye has the formula ##STR31##
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |