Patent US4536471A successfully refreshed from Google Patents.
US4536471A
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Optical information recording medium
Assignee: Konica Minolta Inc
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Filing: 1984-03-15
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Granted: 1985-08-20
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Expires: 2004-03-15
Abstract
Abstract An optical information recording medium for recording and reproducing information by way of applying high density energy beams to a reflective recording layer on a support, said recording layer comprising a hydrophilic colloid; a compound capable of producing a water-insoluble copper complex; and reflective fine particles consisting essentially of copper. A process for manufacturing said optical information recording medium is also provided.
Inventors
- 👤 Shinichi Nishi
- 👤 Taxey Satoh
- 👤 Fumio Shimada
- 👤 Toshiaki Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:42
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/251; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
52 words
An optical information recording medium for recording and reproducing information by way of applying high density energy beams to a reflective recording layer on a support, wherein said reflective recording layer comprises a hydrophilic colloid; a compound capable of producing a water-insoluble copper complex; and reflective fine particles consisting essentially of copper.
Claim 2
Dependent Claim
52 words
An optical information recording medium for recording and reproducing information by way of applying high density energy beams to a reflective recording layer on a support, wherein said reflective recording layer comprises a hydrophilic colloid; a compound capable of producing a water-insoluble copper complex; and reflective fine particles consisting essentially of copper.
Claim 3
Dependent Claim
25 words
The optical information recording medium as claimed in claim 1, wherein said hydrophilic colloid is an acrylic acid resin, a water-soluble cellulose derivative, or gelatin.
Claim 4
Dependent Claim
26 words
The optical information recording medium as claimed in claim 1, wherein an average size of said reflective fine particles is from 0.005 μm to 0.2 μm.
Claim 5
Dependent Claim
30 words
The optical information recording medium as claimed in claim 1, wherein the density of said reflective fine particles is from 1×10 15 /cm 3 to 1×10 18 /cm 3 .
Claim 6
Dependent Claim
47 words
The optical information recording medium as claimed in claim 1, wherein said compound capable of producing a water-insoluble copper complex is a didentate ligand in which a plurality of the doner atoms of O, N or S is allowed to be duplicated each other in said ligand.
Claim 7
Dependent Claim
40 words
The optical information recording medium as claimed in claim 5, wherein said ligand has at least one hydrophobic functional group selected from the group consisting of an aryl group, a heterocyclic group and an alkyl group in the molecule thereof.
Claim 8
Dependent Claim
22 words
The optical information recording medium as claimed in claim 1, wherein said recording layer has a thickness of 0.01 to 0.5 μm.
Claim 9
Dependent Claim
22 words
The optical information recording medium as claimed in claim 1, wherein said support is substantially transparent to the high density energy beams.
Claim 10
Dependent Claim
75 words
A process for manufacturing an optical information recording medium for writing and reading information by way of applying high density energy beams to a reflective recording layer on a support, which comprises the steps of: providing a physical developing nuclei containing layer on a support; physically developing a copper compound in the presence of said physical developing nuclei to obtain said reflective recording layer; and adding a compound capable of producing a water-insoluble copper complex.
Claim 11
Dependent Claim
75 words
A process for manufacturing an optical information recording medium for writing and reading information by way of applying high density energy beams to a reflective recording layer on a support, which comprises the steps of: providing a physical developing nuclei containing layer on a support; physically developing a copper compound in the presence of said physical developing nuclei to obtain said reflective recording layer; and adding a compound capable of producing a water-insoluble copper complex.
Claim 12
Dependent Claim
25 words
The process for manufacturing an optical information recording medium as claimed in claim 9, wherein said physical developing nuclei layer further comprises a hydrophilic colloid.
Claim 13
Dependent Claim
29 words
The process for manufacturing an optical information recording medium as claimed in claim 9, which further comprises providing a hydrophilic colloid layer on said physical developing nuclei containing layer.
Claim 14
Dependent Claim
30 words
The process for manufacturing an optical information recording medium as claimed in claim 9, wherein said copper compound is present in a layer on said physical developing nuclei containing layer.
Claim 15
Dependent Claim
22 words
The process for manufacturing an optical information recording medium as claimed in claim 12, wherein said copper compound is a cuprous halide.
Claim 16
Dependent Claim
27 words
The process for manufacturing an optical information recording medium as claimed in claim 9, wherein said physical developing nuclei has a size of 0.002 to 0.2 μm.
Claim 17
Dependent Claim
29 words
The process for manufacturing an optical information recording medium as claimed in claim 9, wherein said physical developing nuclei containing layer has a thickness of 0.01 to 0.5 μm.
Claim 18
Dependent Claim
29 words
The process for manufacturing an optical information recording medium as claimed in claim 10, wherein said hydrophilic colloid is an acrylic acid resin, a water-soluble cellulose derivative, or gelatin.
References Cited (Backward Citations)
JPS5656839A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-19 | 1989-02-18 | 1989-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-19 | 1993-02-18 | 1993-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-19 | 1997-02-18 | 1997-08-20 | $7700.00 | Window Closed / Lapsed |