US4943515A
Expired / Lapsed
US
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Information recording medium
Assignee: Fujifilm Holdings Corp
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Filing: 1989-02-10
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Granted: 1990-07-24
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Expires: 2009-02-10
Abstract
Abstract A novel information recording medium comprising a substrate and a recording layer for writing and/or reading information by means of a laser beam which is provided on the substrate is disclosed. The recording layer contains a dye having at least one chromophore selected from the group consisting of an amidinium ion chromophore, a carboxyl ion chromophore and a dipolar amide chromophore, and an organic solvent-soluble silver salt. Alternatively, the recording layer contains said chromophore and this recording layer is arranged in contact with a layer of an organic solvent-soluble silver salt.
Inventors
- 👤 Masaki Okazaki
- 👤 Masao Yabe
- 👤 Ken Kawatta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:25
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/249; G03; G03C; G03C1/00; G03C1/494; G11B7/246; G11B7/247; G11B7/2475; G11B2007/24612; G11B7/2472; G11B7/252; G11B7/253; G11B7/2533; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
66 words
A method for recording information comprising irradiating a recording medium which comprises a substrate and a recording layer containing an organic solvent-soluble silver salt and a dye having at least one chromophore selected from the group consisting of an amidinium ion chromophore, a carboxyl ion chromophore and a dipolar amide chromophore, with a laser beam to form pits corresponding to the information in the recording layer.
Claim 2
Independent Claim
66 words
A method for recording information comprising irradiating a recording medium which comprises a substrate and a recording layer containing an organic solvent-soluble silver salt and a dye having at least one chromophore selected from the group consisting of an amidinium ion chromophore, a carboxyl ion chromophore and a dipolar amide chromophore, with a laser beam to form pits corresponding to the information in the recording layer.
Claim 3
Dependent Claim
16 words
The information recording method as claimed in claim 1, wherein said dye is a merocyanine dye.
Claim 4
Dependent Claim
202 words
The information recording method as claimed in claim 2, wherein said dye is a merocyanine dye having the formula (I): ##STR19## in which Z is a nonmetal atom group or a combination of nonmetal atoms required for forming a 5-6 membered heterocyclic ring; Q is a combination of nonmetal atoms group required for forming a 5-6 membered heterocyclic ring containing a nitrogen atom; each of L 1 and L 2 is a methine group or a substituted methine group; l is 1 or 2, m is 3 or 4, and l and m are integers satisfying the condition of l+m=5; R 1 is an alkyl group having 1-18 carbon atoms, an allyl group or a group having the following formula: ##STR20## in which Y is a cyclic imide group, and each of h and i is an integer of 2 to 5; and R 2 is bonded to the nitrogen atom of said heterocyclic ring and is an alkyl group having 1-18 carbon atoms, a substituted alkyl group, an allyl group, an aryl group, a substituted aryl group, a heterocyclic group or a group having the following formula: ##STR21## in which Y, h and i have the same meanings as defined above.
Claim 5
Independent Claim
73 words
A method for recording information comprising irradiating a recording medium which comprises a substrate, a recording layer containing a dye having at least one chromophore selected from the group consisting of an amidinium ion chromophore, a carboxyl ion chromophore and a dipolar amide chromophore, and an organic solvent-soluble silver salt-containing layer arranged in contact with the recording layer, with a laser beam to form pits corresponding to the information in the recording layer.
Claim 6
Independent Claim
73 words
A method for recording information comprising irradiating a recording medium which comprises a substrate, a recording layer containing a dye having at least one chromophore selected from the group consisting of an amidinium ion chromophore, a carboxyl ion chromophore and a dipolar amide chromophore, and an organic solvent-soluble silver salt-containing layer arranged in contact with the recording layer, with a laser beam to form pits corresponding to the information in the recording layer.
Claim 7
Dependent Claim
16 words
The information recording method as claimed in claim 4, wherein said dye is a merocyanine dye.
Claim 8
Dependent Claim
206 words
The information recording method as claimed in claim 4, wherein said dye is a merocyanine dye having the formula (I): ##STR22## in which Z is a nonmetal atom group or a combination of nonmetal atoms required for forming a 5-6 membered heterocyclic ring; Q is a combination of nonmetal atoms group required for forming a 5-6 membered heterocyclic ring containing a nitrogen atom; each of L 1 and L 2 is a methine group or a substituted methine group; l is 1 or 2, m is 3 or 4, and l and m are integers satisfying the condition of l+m=5; R 1 is an alkyl group having 1-18 carbon atoms, a substituted alkyl group, an allyl group or a group having the following formula: ##STR23## in which Y is a cyclic imide group, and each of h and i is an integer of 2 to 5; and R 2 is bonded to the nitrogen atom of said heterocyclic ring and is an alkyl group having 1-18 carbon atoms, a substituted alkyl group, an allyl group, an aryl group, a substituted aryl group, a heterocyclic group or a group having the following formula: ##STR24## in which Y, h and i have the same meanings as defined above.
Claim 9
Independent Claim
69 words
A method for reading information recorded in the form of pits in a recording layer provided on a substrate wherein the recording layer contains an organic solvent-soluble silver salt and a dye having at least one chromophore selected from the group consisting of an amidinium ion chromophore, a carboxyl ion chromophore and a dipolar amide chromophore, by irradiating the recording layer with a laser beam to detect the pits.
Claim 10
Independent Claim
69 words
A method for reading information recorded in the form of pits in a recording layer provided on a substrate wherein the recording layer contains an organic solvent-soluble silver salt and a dye having at least one chromophore selected from the group consisting of an amidinium ion chromophore, a carboxyl ion chromophore and a dipolar amide chromophore, by irradiating the recording layer with a laser beam to detect the pits.
Claim 11
Dependent Claim
16 words
The information reading method as claimed in claim 7, wherein said dye is a merocyanine dye.
Claim 12
Dependent Claim
202 words
The information reading method as claimed in claim 7, wherein said dye is a merocyanine dye having the formula (I): ##STR25## in which Z is a nonmetal atom group or a combination of nonmetal atoms required for forming a 5-6 membered heterocyclic ring; Q is a combination of nonmetal atoms group required for forming a 5-6 membered heterocyclic ring containing a nitrogen atom; each of L 1 and L 2 is a methine group or a substituted methine group; l is 1 or 2, m is 3 or 4, and l and m are integers satisfying the condition of l+m=5; R 1 is an alkyl group having 1-18 carbon atoms, an allyl group or a group having the following formula: ##STR26## in which Y is a cyclic imide group, and each of h and i is an integer of 2 to 5; and R 2 is bonded to the nitrogen atom of said heterocyclic ring and is an alkyl group having 1-18 carbon atoms, a substituted alkyl group, an allyl group, an aryl group, a substituted aryl group, a heterocyclic group or a group having the following formula: ##STR27## in which Y, h and i have the same meanings as defined above.
Claim 13
Independent Claim
77 words
A method for reading information recorded in the form of pits in a recording layer provided on a substrate wherein said recording layer is arranged in contact with a layer containing an organic solvent-soluble silver salt and contains a dye having at least one chromophore selected from the group consisting of an amidinium ion chromophore, a carboxyl ion chromophore and a dipolar amide chromophore, by irradiating the recording layer with a laser beam to detect the pits.
Claim 14
Independent Claim
77 words
A method for reading information recorded in the form of pits in a recording layer provided on a substrate wherein said recording layer is arranged in contact with a layer containing an organic solvent-soluble silver salt and contains a dye having at least one chromophore selected from the group consisting of an amidinium ion chromophore, a carboxyl ion chromophore and a dipolar amide chromophore, by irradiating the recording layer with a laser beam to detect the pits.
Claim 15
Dependent Claim
16 words
The information reading method as claimed in claim 10, wherein said dye is a merocyanine dye.
Claim 16
Dependent Claim
206 words
The information reading method as claimed in claim 10, wherein said dye is a merocyanine dye having the formula (I): ##STR28## in which Z is a nonmetal atom group or a combination of nonmetal atoms required for forming a 5-6 membered heterocyclic ring; Q is a combination of nonmetal atoms group required for forming a 5-6 membered heterocyclic ring containing a nitrogen atom; each of L 1 and L 2 is a methine group or a substituted methine group; l is 1 or 2, m is 3 or 4, and l and m are integers satisfying the condition of l+m=5; R 1 is an alkyl group having 1-18 carbons atoms, a substituted alkyl group, an allyl group or a group having the following formula: ##STR29## in which Y is a cyclic imide group, and each of h and i is an integer of 2 to 5; and R 2 is bonded to the nitrogen atom of said heterocyclic ring and is an alkyl group having 1-18 carbon atoms, a substituted alkyl group, an allyl group, an aryl group, a substituted aryl group, a heterocyclic group or a group having the following formula: ##STR30## in which Y, h and i have the same meanings as defined above.
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