EP0238759A2
Expired / Lapsed
EP
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Optical information writing method
Assignee: Toshiba Corp
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Filing: 1986-12-19
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Granted: —
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Expires: 2006-12-19
Abstract
Abstract An information writing method of an optical recording device selectively irradiates light on an optical recording medium, having a thin organic film containing donor and acceptor molecules, and a pair of electrodes (2, 8) for applying a voltage to the thin organic film, in order to cause charge transfer between the donor and acceptor molecules, and records a change in optical or electric characteristics of the thin organic film by the charge transfer as information. Selective light irradiation is performed while a voltage is applied to the electrodes (2,8).
Inventors
- 👤 Akira C/O Patent Division Miura
- 👤 Nobuhiro C/O Patent Division Gemma
- 👤 Koichi C/O Patent Division Mizushima
- 👤 Makoto C/O Patent Division Azuma
- 👤 Takano C/O Patent Division Iwakiri
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 14:28
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/004; G11B7/0045; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/246; G11B7/248; G11B7/252; G11B7/253; G11B7/2531
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
96 words
I. An information writing method of an optical recording device, for selectively irradiating light on an optical recording medium which comprises a thin organic film, containing donor molecules and acceptor molecules, and a pair of electrodes (2, 8) for applying a voltage to said thin organic film, causing charge transfer between said donor molecules and said acceptor molecules, and recording a change in optical or electrical characteristics of said thin organic film (4, 6) caused upon charge transfer as information, wherein selective light irradiation is performed while a voltage is applied to said electrodes (2, 8).
Claim 2
Independent Claim
29 words
A method according to claim I, characterized in that said thin organic film comprises a first thin film containing donor molecules and a second thin film containing acceptor molecules.
Claim 3
Independent Claim
43 words
A method according to claim I, characterized in that said thin organic film is constituted by repeatedly stacking layers, each comprising a first thin film containing donor molecules and a second thin film containing acceptor molecules, with an insulating molecule film sandwiched therebetween.
Claim 4
Independent Claim
22 words
A method according to claim I, characterized in that said thin organic film comprises a thin film containing donor and acceptor molecules.
Claim 5
Independent Claim
21 words
A method according to claim I, characterized in that said thin organic film is formed in accordance with a Langmuir-Blodgett process.
Claim 6
Independent Claim
29 words
A method according to claim I, characterized in that a wavelength of the light is shorter than that corresponding to a minimum excitation singlet energy of said donor molecules.
Claim 7
Independent Claim
24 words
A method according to claim I, characterized in that said thin organic film is formed on a light- transmitting substrate through a transparent electrode.
Claim 8
Independent Claim
28 words
A method according to claim I, characterized in that an insulating organic molecule layer or a silicon dioxide layer exists between said thin organic film and said electrodes.
Claim 9
Dependent Claim
33 words
A method according to claim 1, characterized in that said thin organic film contains donor and acceptor molecules, at least one of said donor and acceptor molecules being of a plurality of types.
Claim 10
Dependent Claim
66 words
A method according to claim 9, characterized in that said thin organic film has a super lattice structure obtained by repeatedly stacking stack layer members, each comprising a first thin film containing donor molecules, a second thin film containing acceptor molecules, and a third thin film therebetween that contains acceptor molecules of a different type from that of said acceptor molecules of said second thin film.
Claim 11
Dependent Claim
24 words
A method according to claim 10, characterized in that combinations of donor and acceptor molecules are different from one stack layer member to another.
Claim 12
Dependent Claim
35 words
A method according to claim 10, characterized in that said acceptor molecules contained in said third thin film have a smaller electron affinity than that of said acceptor molecules contained in said second thin film.
Claim 13
Dependent Claim
66 words
A method according to claim 9, characterized in that said thin organic film has a super lattice structure obtained by repeatedly stacking stack layer members, each comprising a first thin film containing donor molecules, a second thin film containing acceptor molecules, and a third thin film therebetween that contains donor molecules of a type different from that of said donor molecules of said first thin film.
Claim 14
Dependent Claim
24 words
A method according to claim 13, characterized in that combinations of donor and acceptor molecules are different from one stack layer member to another.
Claim 15
Dependent Claim
35 words
A method according to claim 13, characterized in that said donor molecules contained in said third thin film have a larger ionization potential than that of said donor molecules contained in said first thin film.
Claim 16
Dependent Claim
37 words
A method according to claim 10, characterized in that said thin organic film comprises a thin film containing donor and acceptor molecules, at least one of said donor and acceptor molecules being of a plurality of types.
Claim 17
Dependent Claim
67 words
An optical recording device comprising a recording medium which consists essentially of a thin organic film, containing donor molecules and acceptor molecules, for recording a change in optical characteristics caused upon charge transfer between said donor and acceptor molecules, as information, wherein at least one of said donor and acceptor molecules are of a plurality of types, and information writing and erasing is performed by light irradiation.
Claim 18
Dependent Claim
30 words
t8. A device according to claim 17, characterized in that said thin organic film comprises a first thin film containing donor molecules and a second thin film containing acceptor molecules.
Claim 19
Dependent Claim
43 words
A device according to claim 17, characterized in that said thin organic film is constituted by repeatedly stacking layers each comprising a first thin film containing donor molecules and a second thin film containing acceptor molecules, with an insulating molecule film sandwiched therebetween.
Claim 20
Dependent Claim
22 words
A device according to claim 17, characterized in that said thin organic film comprises a thin film containing donor and acceptor molecules.
Claim 21
Dependent Claim
21 words
A device according to claim 17, characterized in that said thin organic film is formed in accordance with a Langmuir-Blodgett process.
Claim 22
Dependent Claim
29 words
A device according to claim 17, characterized in that a wavelength of the light is shorter than that corresponding to a minimum excitation singlet energy of said donor molecules.
Claim 23
Dependent Claim
24 words
A device according to claim 17, characterized in that wherein said thin organic film is formed on a tight-transmitting substrate through a transparent electrode.
Claim 24
Dependent Claim
28 words
A device according to claim 17, characterized in that an insulating organic molecule layer or a silicon dioxide layer exists between said thin organic film and said electrodes.
Claim 25
Dependent Claim
66 words
A device according to claim 17, characterized in that said thin organic film has a super lattice structure obtained by repeatedly stacking stack layer members, each comprising a first thin film containing donor molecules, a second thin film containing acceptor molecules, and a third thin film therebetween that contains acceptor molecules of a different type from that of said acceptor molecules of said second thin film.
Claim 26
Dependent Claim
24 words
A device according to claim 17, characterized in that combinations of donor and acceptor molecules are different from one stack layer member to another.
Claim 27
Dependent Claim
35 words
A device according to claim 17, characterized in that said acceptor molecules contained in said third thin film have a smaller electron affinity than that of said acceptor molecules contained in said second thin film.
Claim 28
Dependent Claim
66 words
A device according to claim 17, characterized in that said thin organic film has a super lattice structure obtained by repeatedly stacking stack layer members, each comprising a first thin film containing donor molecules, a second thin film containing acceptor molecules, and a third thin film therebetween that contains donor molecules of a type different from that of said donor molecules of said first thin film.
Claim 29
Dependent Claim
24 words
A device according to claim 17, characterized in that combinations of donor and acceptor molecules are different from one stack layer member to another.
Claim 30
Dependent Claim
35 words
A device according to claim 17, characterized in that said donor molecules contained in said third thin film have a larger ionization potential than that of said donor molecules contained in said first thin film.
Claim 31
Dependent Claim
37 words
A device according to claim 17, characterized in that said thin organic film comprises a thin film containing donor and acceptor molecules, at least one of said donor and acceptor molecules being of a plurality of types.
Claim 32
Dependent Claim
87 words
An optical recording device comprising a thin organic film containing donor and acceptor molecules as a recording medium, for recording a change in optical characteristics caused by charge transfer between . said donor and acceptor molecules as information, wherein at least one of said donor and acceptor molecules are of a plurality of types, and lights of not less than two types having different wavelengths are irradiated to cause charge transfer between donor and acceptor molecules in different corresponding regions, thus recording information in a multiplex manner.
Claim 33
Dependent Claim
60 words
A device according to claim 32, characterized in that said thin organic film is obtained by stacking a plurality of stack layer members each comprising a first thin film containing donor molecules, a second thin film containing acceptor molecules, and an insulating molecule film, and combinations of donor and acceptor molecules are different from one stack layer member to another.
Claim 34
Dependent Claim
80 words
A device according to claim 32, characterized in that said thin organic film has a super lattice structure obtained by repeatedly stacking stack layer members, each comprising a first thin film containing donor molecules, a second thin film containing acceptor molecules, and a third thin film therebetween that contains acceptor molecules of a different type from said acceptor molecules of said second thin film, and combinations of donor and acceptor molecules are different from one stack layer member to another.
Claim 35
Dependent Claim
35 words
A device according to claim 32, characterized in that said acceptor molecules contained in said third thin film have a smaller electron affinity than that of said acceptor molecules contained in said second thin film.
Claim 36
Dependent Claim
82 words
A device according to claim 32, characterized in that said thin organic film has a super lattice structure obtained by repeatedly stacking stack layer members each comprising a first thin film containing donor molecules, a second thin film containing acceptor molecules, and a third thin film therebetween that contains donor molecules of a type different from that of said donor molecules of said first thin film, and combinations of donor and acceptor molecules are different from one stack layer member to another.
Claim 37
Dependent Claim
35 words
A device according to claim 32, characterized in that said donor molecules contained in said third thin film have a larger ionization potential than that of said donor molecules contained in said first thin film.
Claim 38
Dependent Claim
37 words
A device according to claim 32, characterized in that said thin organic film comprises a thin film containing donor and acceptor molecules, at least one of said donor and acceptor molecules being of a plurality of types.
Claim 39
Dependent Claim
21 words
A device according to claim 32, characterized in that said thin organic film is formed in accordance with a Langmuir-Blodgett process.
Claim 40
Dependent Claim
29 words
A device according to claim 32, characterized in that a wavelength of the light is shorter than that corresponding to a minimum excitation singlet energy of said donor molecules.
Claim 41
Dependent Claim
24 words
A device according to claim 32, characterized in that said thin organic film is formed on a light- transmitting substrate through a transparent electrode.
Claim 42
Dependent Claim
28 words
A device according to claim 32, characterized in that an insulating organic molecule layer or a silicon dioxide layer exists between said thin organic film and said electrodes.
References Cited (Backward Citations)
No citation records indexed.
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