US4957854A
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Optical recording medium
Assignee: Canon Inc
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Filing: 1988-04-08
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Granted: 1990-09-18
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Expires: 2008-04-08
Abstract
Abstract An optical recording medium comprises an organic thin film recording layer on a substrate, which medium performs recording of information by forming a pit with photoenergy, said organic thin film recording layer comprising an organic dye and a polymeric surfactant.
Inventors
- 👤 Yoshihiro Oguchi
- 👤 Yoshio Takasu
- 👤 Kyo Miura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:58
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/245; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
161 words
An optical recording medium comprising an organic thin film recording layer on a substrate, which performs recording of information by forming a pit with photoenergy, said organic thin film recording layer comprising an organic dye and a polymeric surfactant, wherein said polymeric surfactant is a cationic polymeric surfactant comprising a polymer having a monomer represented by the following formula [I]: ##STR11## wherein R 1 is H or CH 3 ; R 2 and R 3 are alkyl groups having 1 to 4 carbon atoms or hydroxyalkyl groups having 2 to 4 carbon atoms, which may be either the same or different; R 4 is H, an alkyl group having 1 to 4 carbon atoms, an hydroxyalkyl group having 2 to 4 carbon atoms, or a benzyl group; A is an oxygen atom or NH; B is an alkylene group having 1 to 4 carbon atoms or an hydroxyalkylene group having 2 to 4 carbon atoms; and X.sup.⊖ is an anionic counterion.
Claim 2
Dependent Claim
161 words
An optical recording medium comprising an organic thin film recording layer on a substrate, which performs recording of information by forming a pit with photoenergy, said organic thin film recording layer comprising an organic dye and a polymeric surfactant, wherein said polymeric surfactant is a cationic polymeric surfactant comprising a polymer having a monomer represented by the following formula [I]: ##STR11## wherein R 1 is H or CH 3 ; R 2 and R 3 are alkyl groups having 1 to 4 carbon atoms or hydroxyalkyl groups having 2 to 4 carbon atoms, which may be either the same or different; R 4 is H, an alkyl group having 1 to 4 carbon atoms, an hydroxyalkyl group having 2 to 4 carbon atoms, or a benzyl group; A is an oxygen atom or NH; B is an alkylene group having 1 to 4 carbon atoms or an hydroxyalkylene group having 2 to 4 carbon atoms; and X.sup.⊖ is an anionic counterion.
Claim 3
Dependent Claim
36 words
An optical recording medium according to claim 1, wherein in the monomer shown by said formula [I], R 2 , R 3 and R 4 are each methyl or ethyl group, and B is methylene group.
Claim 4
Dependent Claim
23 words
An optical recording medium according to claim 1, wherein said cationic polymeric surfactant has an (weight) average molecular weight of 50,000 to 1,800,000.
Claim 5
Dependent Claim
23 words
An optical recording medium according to claim 3, wherein said cationic polymeric surfactant has an (weight) average molecular weight of 400,000 to 1,500,000.
Claim 6
Dependent Claim
24 words
An optical recording medium according to claim 1, wherein the mixing ratio of said organic dye and said polymeric surfactant is 1:99 to 99:1.
Claim 7
Dependent Claim
24 words
An optical recording medium according to claim 5, wherein the mixing ratio of said organic dye and said polymeric surfactant is 40:60 to 95:5.
Claim 8
Dependent Claim
25 words
An optical recording medium according to claim 1, wherein said organic thin film recording layer has a film thickness of 10 Å to 10 μm.
Claim 9
Dependent Claim
25 words
An optical recording medium according to claim 7, wherein said organic thin film recording layer has a film thickness of 400 Å to 5000 Å.
Claim 10
Dependent Claim
16 words
An optical recording medium according to claim 1, wherein said organic dye is a basic dye.
Claim 11
Independent Claim
175 words
A method for recording onto an optical recording medium, which comprises the step of irradiating with a laser beam an optical recording medium comprising an organic thin film recording layer containing an organic dye and a polymeric surfactant comprising a polymer having a monomer represented by the following formula [I] on a substrate, thereby forming a pit at the laser beam irradiated portion of said organic thin film recording layer, wherein formula [I] comprises: ##STR12## wherein R 1 is H or CH 3 ; R 2 and R 3 are alkyl groups having 1 to 4 carbon atoms or hydroxyalkyl groups having 2 to 4 carbon atoms, which may be either the same or different; R 4 is H, an alkyl group having 1 to 4 carbon atoms, an hydroxyalkyl group having 2 to 4 carbon atoms, or a benzyl group; A is an oxygen atom or NH; B is an alkylene group having 1 to 4 carbon atoms or an hydroxyalkylene group having 2 to 4 carbon atoms; and X.sup.⊖ is an anionic counterion.
Claim 12
Independent Claim
175 words
A method for recording onto an optical recording medium, which comprises the step of irradiating with a laser beam an optical recording medium comprising an organic thin film recording layer containing an organic dye and a polymeric surfactant comprising a polymer having a monomer represented by the following formula [I] on a substrate, thereby forming a pit at the laser beam irradiated portion of said organic thin film recording layer, wherein formula [I] comprises: ##STR12## wherein R 1 is H or CH 3 ; R 2 and R 3 are alkyl groups having 1 to 4 carbon atoms or hydroxyalkyl groups having 2 to 4 carbon atoms, which may be either the same or different; R 4 is H, an alkyl group having 1 to 4 carbon atoms, an hydroxyalkyl group having 2 to 4 carbon atoms, or a benzyl group; A is an oxygen atom or NH; B is an alkylene group having 1 to 4 carbon atoms or an hydroxyalkylene group having 2 to 4 carbon atoms; and X.sup.⊖ is an anionic counterion.
Claim 13
Dependent Claim
148 words
An optical disc comprising an organic thin film recording layer for recording information by forming pit with photoenergy, said organic thin film recording layer comprising an organic dye and a polymeric surfactant, said polymeric surfactant comprising a polymer having a monomer represented by the following formula [I]: ##STR13## wherein R 1 is H or CH 3 ; R 2 and R 3 are alkyl groups having 1 to 4 carbon atoms or hydroxyalkyl groups having 2 to 4 carbon atoms, which may be either the same or different; R 4 is H, an alkyl group having 1 to 4 carbon atoms, an hydroxyalkyl group having 2 to 4 carbon atoms, or a benzyl group; A is an oxygen atom or NH; B is an alkylene group having 1 to 4 carbon atoms or an hydroxyalkylene group having 2 to 4 carbon atoms; and X.sup.⊖ is an anionic counterion.
Claim 14
Dependent Claim
148 words
An optical disc comprising an organic thin film recording layer for recording information by forming pit with photoenergy, said organic thin film recording layer comprising an organic dye and a polymeric surfactant, said polymeric surfactant comprising a polymer having a monomer represented by the following formula [I]: ##STR13## wherein R 1 is H or CH 3 ; R 2 and R 3 are alkyl groups having 1 to 4 carbon atoms or hydroxyalkyl groups having 2 to 4 carbon atoms, which may be either the same or different; R 4 is H, an alkyl group having 1 to 4 carbon atoms, an hydroxyalkyl group having 2 to 4 carbon atoms, or a benzyl group; A is an oxygen atom or NH; B is an alkylene group having 1 to 4 carbon atoms or an hydroxyalkylene group having 2 to 4 carbon atoms; and X.sup.⊖ is an anionic counterion.
Claim 15
Dependent Claim
149 words
An optical card comprising an organic thin film recording layer for recording information by forming a pit with photoenergy, said organic thin film recording layer comprising an organic dye and a polymeric surfactant, said polymeric surfactant comprising a polymer having a monomer represented by the following formula [I]: ##STR14## wherein R 1 is H or CH 3 ; R 2 and R 3 are alkyl groups having 1 to 4 carbon atoms or hydroxyalkyl groups having 2 to 4 carbon atoms, which may be either the same or different; R 4 is H, an alkyl group having 1 to 4 carbon atoms, an hydroxyalkyl group having 2 to 4 carbon atoms, or a benzyl group; A is an oxygen atom or NH; B is an alkylene group having 1 to 4 carbon atoms or an hydroxyalkylene group having 2 to 4 carbon atoms; and X.sup.⊖ is an anionic counterion.
Claim 16
Dependent Claim
149 words
An optical card comprising an organic thin film recording layer for recording information by forming a pit with photoenergy, said organic thin film recording layer comprising an organic dye and a polymeric surfactant, said polymeric surfactant comprising a polymer having a monomer represented by the following formula [I]: ##STR14## wherein R 1 is H or CH 3 ; R 2 and R 3 are alkyl groups having 1 to 4 carbon atoms or hydroxyalkyl groups having 2 to 4 carbon atoms, which may be either the same or different; R 4 is H, an alkyl group having 1 to 4 carbon atoms, an hydroxyalkyl group having 2 to 4 carbon atoms, or a benzyl group; A is an oxygen atom or NH; B is an alkylene group having 1 to 4 carbon atoms or an hydroxyalkylene group having 2 to 4 carbon atoms; and X.sup.⊖ is an anionic counterion.
References Cited (Backward Citations)
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