US4656121A
Expired / Lapsed
US
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Optical information recording medium
Assignee: Ricoh Co Ltd
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Filing: 1985-02-06
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Granted: 1987-04-07
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Expires: 2005-02-06
Abstract
Abstract This invention relates to an optical information recording medium having an organic thin film recording layer, and optionally having an underlayer and/or protective layer, characterized in that at least one of said recording layer, underlayer and protective layer contains a compound expressed by the general formula (1), ##STR1## wherein R represents hydrogen or a lower alkyl group; X represents acid anion; m represents 0, 1 or 2; and A represents ##STR2## (n being 1 or 2) or ##STR3## (when m is 2); all the aromatic rings optionally having a substituent selected from the group of a lower alkyl group, lower alkoxy group, halogen and hydroxyl group.
Inventors
- 👤 Tsutomu Sato
- 👤 Masaakira Umehara
- 👤 Michiharu Abe
- 👤 Hideaki Oba
- 👤 Yutaka Ueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:04
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/246; G11B7/247; G11B7/2463; G11B7/2472; G11B7/2475; G11B7/248; G11B7/249; G11B7/2492; G11B7/2498; G11B7/252; G11B7/253; G11B7/2533; G11B7/254; G11B7/256; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/146; Y10S430/165
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
113 words
An optical information recording medium comprising a substrate and an organic thin film recording layer containing a polymethine colorant having a polymethine chain, in admixture with a compound selected from the group consisting of ##STR39## wherein R represents hydrogen or lower alkyl; X represents an acid anion; and A represents ##STR40## wherein n is 1 or 2; all the aromatic rings being substituted or unsubstituted with a substituent selected from the group consisting of lower alkyl, lower alkoxy, halogen and hydroxyl, the amount of said colorant and said compound being in sufficient quantity amount to enable the medium to have information recorded in said layer upon irradiation of the medium with laser light.
Claim 2
Dependent Claim
113 words
An optical information recording medium comprising a substrate and an organic thin film recording layer containing a polymethine colorant having a polymethine chain, in admixture with a compound selected from the group consisting of ##STR39## wherein R represents hydrogen or lower alkyl; X represents an acid anion; and A represents ##STR40## wherein n is 1 or 2; all the aromatic rings being substituted or unsubstituted with a substituent selected from the group consisting of lower alkyl, lower alkoxy, halogen and hydroxyl, the amount of said colorant and said compound being in sufficient quantity amount to enable the medium to have information recorded in said layer upon irradiation of the medium with laser light.
Claim 3
Dependent Claim
23 words
The optical information recording medium according to claim 1, wherein said recording layer contains from 2 to 60% by weight, of said compound.
Claim 4
Dependent Claim
20 words
The optical information recording medium according to claim 1, further comprises an underlayer between said substrate and said recording layer.
Claim 5
Dependent Claim
18 words
The optical information recording medium according to claim 1, further comprises a protective layer overlying said recording layer.
Claim 6
Dependent Claim
22 words
The optical information recording medium according to claim 1, wherein said recording layer has a thickness of 100 Å to 5 μm.
Claim 7
Dependent Claim
20 words
The optical information recording medium according to claim 3, wherein said underlayer has a thickness of 0.1 to 30 μm.
Claim 8
Dependent Claim
20 words
The optical information recording medium according to claim 4, wherein said protective layer has a thickness more than 0.1 μm.
Claim 9
Dependent Claim
18 words
The optical information recording medium according to claim 1, wherein said polymethine colorant is a cyanine coloring matter.
Claim 10
Dependent Claim
43 words
The optical information recording medium according to claim 1, wherein said medium further contains at least one low molecular weight compound selected from the group consisting of plasticizer, surfactant, antistatic agent, slip additive, fire retardant, stabilizer, dispersing agent, antioxidant and light resistance improver.
Claim 11
Dependent Claim
20 words
The optical information recording medium according to claim 1, wherein said compound is selected from the group consisting of: ##STR41##
Claim 12
Dependent Claim
17 words
An optical information recording medium according to claim 1, in which said compound has the formula, ##STR42##
Claim 13
Dependent Claim
16 words
An optical information recording medium as claimed in claim 11 in which R is lower alkyl.
Claim 14
Dependent Claim
24 words
An optical information recording medium as claimed in claim 11 in which R is n-C 3 H 7 and X is SbF 6 .
Claim 15
Dependent Claim
17 words
An optical information recording medium according to claim 1 in which said compound has the formula ##STR43##
Claim 16
Dependent Claim
17 words
An optical information recording medium according to claim 1, in which said compound has the formula, ##STR44##
Claim 17
Dependent Claim
102 words
An optical information recording medium as claimed in claim 11 in which said organic thin film recording layer contains coloring matter selected from the group consisting of ##STR45## wherein R 1 and R 2 are alkyl, hydroxyalkyl, alkoxyalkyl, aralkyl, carboxyalkyl, carboxyalkylate bonded with an alkaline metal cation, sulphoalkyl or sulphonate alkyl bonded with alkaline metal cation or sulphoalkyl; Z 1 and Z 2 are 5 membered or 6 membered heterocyclic rings or atomic groups capable of composing a condensed ring comprising 5 membered or 6 membered heterocyclic rings; l is an integer of 1 to 4 and X is an acid anion.
Claim 18
Dependent Claim
25 words
An optical information recording medium as claimed in claim 13 in which said organic thin film recording layer contains coloring matter having the formula ##STR46##
Claim 19
Dependent Claim
42 words
The optical information recording medium according to claim 1, wherein said medium further contains at least one high molecular compound selected from the group consisting of ionomer resin, polyamide resin, vinyl resin, natural high molecular compound, silicone, liquid rubber and silane coupler.
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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) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |