EP0143992A1
Expired / Lapsed
EP
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Optical information recording medium
Assignee: Ricoh Co Ltd
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Filing: 1984-10-31
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Granted: —
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Expires: 2004-10-31
Abstract
Abstract Tne present invention relates to an optical information recording medium comprising a substrate, recording layer and protective layer, characterized in that said protective layer comprises, as the main components, a high molecular compound and at least one of record-promoting agents selected from the group of (a) explosive material, (b) plasticizer, (c) organic low molecular compound having a melting point not higher than 140°C, and (d) light-absorbing material.
Inventors
- 👤 Tsutomu Sato
- 👤 Hideaki Oba
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 15:12
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/245; G11B7/252; G11B7/254; G11B7/246; G11B7/247; G11B7/2472; Y; Y10; Y10S; Y10S430/00; Y10S430/146; Y10S430/162
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
61 words
An optical information recording medium comprising a substrate, recording layer and protective layer, characterized in that said protective layer comprises, as the main components, a high molecular compound and at least one of record-promoting agents selected from the group of (a) explosive material,(b) plasticizer, (c) organic low molecular compound having a melting point not higher than 140°C, and (d) light-absorbing material.
Claim 2
Dependent Claim
61 words
An optical information recording medium comprising a substrate, recording layer and protective layer, characterized in that said protective layer comprises, as the main components, a high molecular compound and at least one of record-promoting agents selected from the group of (a) explosive material,(b) plasticizer, (c) organic low molecular compound having a melting point not higher than 140°C, and (d) light-absorbing material.
Claim 3
Dependent Claim
17 words
The optical information recording medium according to Claim 1, wherein said record-promoting agent is an explosive material.
Claim 4
Dependent Claim
26 words
The optical information recording medium according to Claim 2, wherein the weight ratio of the explosive material / the high molecular compound is 0.05 - 0.70/1.
Claim 5
Dependent Claim
16 words
The optical information recording medium according to Claim 2, wherein said explosive material is a nitro-compound.
Claim 6
Dependent Claim
16 words
The optical information recording medium according to Claim 1, wherein said record-promoting agent is a plasticizer.
Claim 7
Dependent Claim
32 words
The optical information recording medium according to Claim 5, wherein the plasticizer is used in an amount of 10 - 80 % by weight to the total weight of the protective layer.
Claim 8
Dependent Claim
16 words
The optical information recording medium according to Claim 5, wherein said plasticizer is phthalic acid ester.
Claim 9
Dependent Claim
16 words
The optical information recording medium according to Claim 5, wherein said plasticizer is aliphatic acid ester.
Claim 10
Dependent Claim
16 words
The optical information recording medium according to Claim 5, wherein said plasticizer is dihydric alcohol ester.
Claim 11
Dependent Claim
15 words
The optical information recording medium according to Claim 5, wherein said plasticizer is oxyacid ester.
Claim 12
Dependent Claim
27 words
The optical information recording medium according to Claim 1, wherein said record-promoting agent is an organic low molecular compound having a melting point not higher than 140°C.
Claim 13
Dependent Claim
32 words
The optical information recording medium according to Claim 11, wherein the organic low molecular compound is used in an amount of 0.5 - 50 % by weight to the high molecular compound.
Claim 14
Dependent Claim
17 words
The optical information recording medium according to Claim 11, wherein said organic low molecular compound is maltose.
Claim 15
Dependent Claim
17 words
The optical information recording medium according to Claim 11, wherein said organic low molecular compound is phenanthroline.
Claim 16
Dependent Claim
18 words
The optical information recording medium according to Claim 11, wherein said organic low molecular compound is benzoic acid.
Claim 17
Dependent Claim
17 words
The optical information recording medium according to Claim 11, wherein said organic low molecular compound is 3,4-benzphenanthrene.
Claim 18
Dependent Claim
17 words
The optical information recording medium according to Claim 1, wherein said record-promoting agent is a light-absorbing material.
Claim 19
Dependent Claim
18 words
The optical information recording medium according to Claim 17, wherein said light-absorbing material is an organic coloring matter.
Claim 20
Dependent Claim
26 words
The optical information recording medium according to Claim 17, wherein the weight ratio of the light-absorbing material / the high molecular compound is 0.03 - 0.4/1.
Claim 21
Dependent Claim
20 words
The optical information recording medium - according to Claim 17, wherein said organic coloring matter is a cyanine coloring matter.
Claim 22
Dependent Claim
20 words
The optical information recording medium according to Claim 20, wherein said cyanine coloring matter is an indolenine type coloring matter.
Claim 23
Dependent Claim
20 words
The optical information recording medium according to Claim 21, wherein said indolenine type coloring matter is l-methyl-2-(7-(l-methyl-3,3'-dimethyl-5-halo-2-indol- inilidene)-1,3,5-heptatrienyl)-3,3-dimethyl-5-halo- indolium perchlorate.
Claim 24
Dependent Claim
19 words
The optical information recording medium according to Claim 17, wherein said organic coloring matter is a transition metal complex.
Claim 25
Dependent Claim
55 words
The optical information recording medium according to Claim 1, wherein said record-promoting agent comprises at least two of (a) explosive material, (b) plasticizer, (c) organic low molecular compound and (d) light-absorbing material. 25. The optical information recording medium according to Claim 1, wherein said protective layer has a thickness of 0.5 µm - 500 pm.
Claim 26
Dependent Claim
22 words
The optical information recording medium according to Claim 1, wherein said protective layer has a thickness of 10 pm - 200 pm.
Claim 27
Dependent Claim
26 words
The optical information recording medium according to Claim 1, wherein the weight ratio of the record-promoting agent / the high molecular compound is 0.05 - 0.70/1.
Claim 28
Dependent Claim
17 words
The optical information recording medium according to Claim 1, wherein said recording layer comprises an inorganic material.
Claim 29
Dependent Claim
17 words
The optical information recording medium according to Claim 1, wherein said recording layer comprises an organic material.
Claim 30
Dependent Claim
21 words
The optical information recording medium according to Claim 29, wherein said organic material comprises an organic coloring matter and a resin.
Claim 31
Dependent Claim
19 words
The optical information recording medium according to Claim 29, wherein said organic material comprises an organic coloring matter alone.
Claim 32
Dependent Claim
19 words
The optical information recording medium according to Claim 31, wherein said organic coloring matter is a cyanine coloring matter.
Claim 33
Dependent Claim
20 words
The optical information recording medium according to Claim 32, wherein said cyanine coloring matter is an indolenine type coloring matter.
Claim 34
Dependent Claim
20 words
The optical information recording medium according to Claim 33, wherein said indolenine type coloring matter is I-methyl-2-(7-(1-methyl-3,3'-dimethyl-5-halo-2-indol- inilidene)-1,3,5-heptatrienyl)-3,3-dimethyl-S-halo- indolium perchlorate.
Claim 35
Dependent Claim
21 words
The optical information recording medium according to Claim 1, wherein said recording layer has a thickness of 100 - 5000 A°.
Claim 36
Dependent Claim
21 words
The optical information recording medium according to Claim 1, wherein said recording layer has a thickness of 100 - 1000 A°.
Claim 37
Dependent Claim
21 words
The optical information recording medium according to Claim 1, wherein said recording layer has a thickness of 200 - 600 A°.
Claim 38
Dependent Claim
17 words
The optical information recording medium according to Claim 31, wherein said recording layer is applied by spin-coating.
References Cited (Backward Citations)
FR2368779A1
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DE2757744A1
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DE2826122A1
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GB2005457A
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EP0014046A1
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FR2466830A1
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EP0083991A2
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FR2536197A1
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