Patent US4618561A successfully refreshed from Google Patents.
US4618561A
Expired / Lapsed
US
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Monomolecular record memory medium with photosensitive diazonium salt
Assignee: Canon Inc
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Filing: 1984-11-29
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Granted: 1986-10-21
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Expires: 2004-11-29
Abstract
Abstract A record memory medium comprises a recording layer comprising a monomolecular film or monomolecular layer built-up film of a photosensitive organic compound having a hydrophilic moiety and a hydrophobic moiety. The medium can be used for recording/reading-out of information and light recording.
Inventors
- 👤 Hirohide Munakata
- 👤 Yoshinori Tomida
- 👤 Masahiro Haruta
- 👤 Yutaka Hirai
- 👤 Yukuo Nishimura
- 👤 Takashi Hamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:44
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G03; G03C; G03C1/00; G03C1/52; G11B7/246; G11B7/2467; G11B7/252; G11B7/253; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
117 words
A record memory medium comprising (a) a substrate and (b) a recording layer on said substrate which recording layer comprises a monomolecular film or monomolecular layer built-up film from about 4 to 10,000 angstroms in thickness of a photosensitive benzene diaxonium salt having a long-chain C 8 to C 30 alkyl group as a side chain, said C 8 to C 30 alkyl group being any one of saturated, unsaturated or substituted with an amino group or a carboxyl group, whereby said benzene diazonuim salt is capable of coupling with a coupling component to form an azo compound and whereby the medium, after photolysis and coupling reactions, is capable of being read out by light or photocurrent.
Claim 2
Dependent Claim
117 words
A record memory medium comprising (a) a substrate and (b) a recording layer on said substrate which recording layer comprises a monomolecular film or monomolecular layer built-up film from about 4 to 10,000 angstroms in thickness of a photosensitive benzene diaxonium salt having a long-chain C 8 to C 30 alkyl group as a side chain, said C 8 to C 30 alkyl group being any one of saturated, unsaturated or substituted with an amino group or a carboxyl group, whereby said benzene diazonuim salt is capable of coupling with a coupling component to form an azo compound and whereby the medium, after photolysis and coupling reactions, is capable of being read out by light or photocurrent.
Claim 3
Dependent Claim
22 words
A record memory medium according to claim 1 wherein said monomolecular film or monomolecular layer built-up film is a Langmuir Blodgett film.
Claim 4
Dependent Claim
24 words
A record memory medium according to claim 1, wherein said substrate is selected from the group consisting of glass, aluminum, plastics, ceramics and silicon.
Claim 5
Dependent Claim
121 words
A record memory medium comprising (a) a substrate and (b) a recording layer on said substrate which recording layer comprises a monomolecular film or monomolecular layer built-up film from about 4 to 10,000 angstrom in thickness of a photosensitive benzene diazonium salt having a long-chain C 8 to C 30 alkyl group as a side chain, said C 8 to C 30 alkyl group being any one of saturated, unsaturated or substituted witn an amino group or a carboxyl group, and (c) photoconductive layer, whereby said benzene diazonium salt is capable of coupling with a coupling component to form an azo compound and whereby the medium, after photolysis and coupling reactions, is capable of being read out by light or photocurrent.
Claim 6
Dependent Claim
121 words
A record memory medium comprising (a) a substrate and (b) a recording layer on said substrate which recording layer comprises a monomolecular film or monomolecular layer built-up film from about 4 to 10,000 angstrom in thickness of a photosensitive benzene diazonium salt having a long-chain C 8 to C 30 alkyl group as a side chain, said C 8 to C 30 alkyl group being any one of saturated, unsaturated or substituted witn an amino group or a carboxyl group, and (c) photoconductive layer, whereby said benzene diazonium salt is capable of coupling with a coupling component to form an azo compound and whereby the medium, after photolysis and coupling reactions, is capable of being read out by light or photocurrent.
Claim 7
Dependent Claim
21 words
A record memory medium according to claim 4, wherein said monomolecular film or monomolecular layer built-up film is a Langmuir-Blodgett film.
Claim 8
Dependent Claim
24 words
A record memory medium according to claim 4, wherein said substrate is selected from the group consisting of glass, aluminum, plastics, ceramics and silicon.
Claim 9
Dependent Claim
26 words
A recording memory medium according to claim 4, wherein said photoconductive layer is made from the group consisting of CdS, Se, amorphous Si, and amorphous Se.
Claim 10
Dependent Claim
123 words
A record memory medium comprising (a) a substrate and (b) a recording layer on said substrate which recording layer comprises a monomolecular film or monomolecular layer built-up film from about 4 to 10,000 angstroms in thickness of (1) a photosensitive benzene diazonium salt having a long-chain C 8 to C 30 alkyl group as a side chain, said C 8 to C 30 alkyl group being, any one of saturated, unsaturated or substituted with an amino group or a carboxyl group, and (2) a coupling component whereby said benzene diazonium salt is capable of coupling with a coupling component to form an azo compound and whereby the medium, after photolysis and coupling reactions, is capable of being read out by light or photocurrent.
Claim 11
Dependent Claim
123 words
A record memory medium comprising (a) a substrate and (b) a recording layer on said substrate which recording layer comprises a monomolecular film or monomolecular layer built-up film from about 4 to 10,000 angstroms in thickness of (1) a photosensitive benzene diazonium salt having a long-chain C 8 to C 30 alkyl group as a side chain, said C 8 to C 30 alkyl group being, any one of saturated, unsaturated or substituted with an amino group or a carboxyl group, and (2) a coupling component whereby said benzene diazonium salt is capable of coupling with a coupling component to form an azo compound and whereby the medium, after photolysis and coupling reactions, is capable of being read out by light or photocurrent.
Claim 12
Dependent Claim
20 words
A record memory medium according to claim 8, wherein said monomolecular film or monomolecular built-up film is a Langmuir-Blodgett film.
Claim 13
Dependent Claim
24 words
A record memory medium according to claim 8, wherein said substrate is selected from the group consisting of glass, aluminum, plastics, ceramics and silicon.
Claim 14
Dependent Claim
126 words
A record memory medium comprising (a) a substrate (b) a recording layer on said substrate which recording layer comprises a monomolecular film or monomolecular layer built-up film from about 4 to 10,000 angstroms in thickness of (1) a photosensitive benzene diazonium salt having a long-chain C 8 to C 30 alkyl group as a side chain, said C 8 to C 30 alkyl group being any one of saturated, unsaturated or substituted with an amino group or a carboxyl group, and (2) a coupling component and (c) photoconductive layer whereby said benzene diazonium salt is capable of coupling with a coupling component to form an azo compound and whereby the medium, after photolysis and coupling reactions, is capable of being read out by light or photocurrent.
Claim 15
Dependent Claim
126 words
A record memory medium comprising (a) a substrate (b) a recording layer on said substrate which recording layer comprises a monomolecular film or monomolecular layer built-up film from about 4 to 10,000 angstroms in thickness of (1) a photosensitive benzene diazonium salt having a long-chain C 8 to C 30 alkyl group as a side chain, said C 8 to C 30 alkyl group being any one of saturated, unsaturated or substituted with an amino group or a carboxyl group, and (2) a coupling component and (c) photoconductive layer whereby said benzene diazonium salt is capable of coupling with a coupling component to form an azo compound and whereby the medium, after photolysis and coupling reactions, is capable of being read out by light or photocurrent.
Claim 16
Dependent Claim
20 words
A record memory medium according to claim 11, wherein said monomolecular film or monomolecular built-up film is a Langmuir-Blodgett film.
Claim 17
Dependent Claim
24 words
A record memory medium according to claim 11, wherein said substrate is selected from the group consisting of glass, aluminum, plastics, ceramics and silicon.
Claim 18
Dependent Claim
26 words
A recording memory medium according to claim 11, wherein said photoconductive layer is made from the group consisting of CdS, Se, amorphous Si, and amorphous Se.
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