US4933221A
Expired / Lapsed
US
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Optical recording device
Assignee: Canon Inc
•
Filing: 1988-08-17
•
Granted: 1990-06-12
•
Expires: 2008-08-17
Abstract
Abstract An optical recording device and an information memorizing device utilizing the same are provided. The optical recording device comprises an A-layer comprising a chromogenic compound which is usually colorless or pale colored, a B-layer comprising an auxochromic compound capable of making said chromogenic compound form color through contact with said chromogenic compound, and a light-absorbing layer, at least one of the three layers being constituted of a monomolecular film or a built-up film thereof.
Inventors
- 👤 Yukuo Nishimura
- 👤 Haruki Kawada
- 👤 Masahiro Haruta
- 👤 Yutaka Hirai
- 👤 Noritaka Mochizuki
- 👤 Takashi Nakagiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:13
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/246; G11B7/248; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/146; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/31504
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
74 words
An optical recording device, which comprises: a laminated member comprising an A-layer containing a chromogenic compound which is colorless or pale colored, a light-absorbing layer, a B-layer containing an assistant compound capable of making said chromogenic compound form color through contact with said chromogenic compound; and a substrate; wherein at least a middle layer of said three layers is constituted of monomolecular film or a built-up film thereof formed according to the Langmuir-Blodgett method.
Claim 2
Dependent Claim
74 words
An optical recording device, which comprises: a laminated member comprising an A-layer containing a chromogenic compound which is colorless or pale colored, a light-absorbing layer, a B-layer containing an assistant compound capable of making said chromogenic compound form color through contact with said chromogenic compound; and a substrate; wherein at least a middle layer of said three layers is constituted of monomolecular film or a built-up film thereof formed according to the Langmuir-Blodgett method.
Claim 3
Dependent Claim
84 words
An optical recording device according to claim 1, which comprises an A-layer comprising a chromogenic compound which is colorless or pale colored, a light-absorbing layer, a B-layer comprising an assistant compound capable of making said chromogenic compound form color through contact with said chromogenic compound, said three layers being laminated in this order and a substrate wherein at least the light absorbing layer of said three layers being constituted of a monomolecular film or a built-up film thereof formed according to the Langmuir-Blodgett method.
Claim 4
Dependent Claim
19 words
An optical recording device according to claim 2, wherein said chromogenic compound is a leuco derivative of a dye.
Claim 5
Dependent Claim
27 words
An optical recording device according to claim 2, wherein said chromogenic compound is selected from triphenylmethane type, fluorane type, phenothiazine type, auramine type and spiropyrane type compounds.
Claim 6
Dependent Claim
27 words
An optical recording device according to claim 2, wherein said assistant compound is selected from aromatic sulfonic acid compounds, aromatic carboxylic acids and higher aliphatic carboxylic acid.
Claim 7
Dependent Claim
16 words
An optical recording device according to claim 2, wherein said assistant compound is a phenolic compound.
Claim 8
Dependent Claim
41 words
An optical recording device according to claim 6, wherein said phenolic compound is selected from among p-t-butylphenol, α-naphthol, β-naphthol, phenolphthalein bisphenol-A, p-phenoxyphenol. 4-hydroxyacetophenone, 3,5-xylenol, thymol, hydroquinone, methyl-4-hydroxybenzoate, catechol, resorcinol, 4-t-octylcatechol, 4,4'-sec-butylidenediphenol, 2,2'-dihydroxydiphenyl, 2,2'-methylenebis(4-methyl-6-t-butylphenol), 2,2'-bis(4-oxyphenyl)propane, 4,4'-isopropylidene-bis(2-t-butylphenol), pyrogallol, phloroglucinol and phloroglucinol carboxylic acid.
Claim 9
Dependent Claim
22 words
An optical recording device according to claim 2, wherein said light-absorbing layer comprises a meltable light-absorbing dye or a sublimable light-absorbing dye.
Claim 10
Dependent Claim
31 words
An optical recording device according to claim 2, wherein said light-absorbing layer is selected from among metal phthalocyanines and derivatives thereof, xanthene type dyes, metal-containing azo dyes and acidic azo dyes.
Claim 11
Dependent Claim
23 words
An optical recording device according to claim 2, wherein said A-layer and B-layer have a thickness ranging from 200 Å to 10 μm.
Claim 12
Dependent Claim
22 words
An optical recording device according to claim 2, wherein said light-absorbing layer has a thickness ranging from 30 Å to 1000 Å.
Claim 13
Dependent Claim
104 words
An optical recording device according to claim 1, which comprises a light-absorbing layer, an A-layer comprising a chromogenic compound which is colorless or pale colored, a B-layer comprising an assistant compound capable of making said chromogenic compound form color through contact with said chromogenic compound, said three layers being laminated in this order and a substrate wherein at least one of said three layers being constituted of a monomolecular film or a built-up film thereof formed according to the Langmuir-Blodgett method, and the reactive sites of the assistant compound and of the chromogenic compound being separated from each other through the non-reactive sites thereof.
Claim 14
Dependent Claim
19 words
An optical recording device according to claim 12, wherein said chromogenic compound is a leuco derivative of a dye.
Claim 15
Dependent Claim
27 words
An optical recording device according to claim 12, wherein said chromogenic compound is selected from triphenylmethane type, fluorane type, phenothiazine type, auramine type and spiropyrane type compounds.
Claim 16
Dependent Claim
27 words
An optical recording device according to claim 12, wherein said assistant compound is selected from aromatic sulfonic acid compounds, aromatic carboxylic acids and higher aliphatic carboxylic acids.
Claim 17
Dependent Claim
16 words
An optical recording device according to claim 12, wherein said assistant compound is a phenolic compound.
Claim 18
Dependent Claim
42 words
An optical recording device according to claim 16, wherein said phenolic compound is selected from among p-t-butylphenol, α-naphthol, β-naphthol, phenolphthalein, bisphenol-A, p-phenoxyphenol, 4-hydroxyacetophenone, 3,5-xylenol, thymol, hydroquinone, methyl 4-hydroxybenzoatc, catechol, resorcinol, 4-t-octylcatechol. 4,4'-sec-butylidenediphenol, 2,2'-dihydroxydiphenyl, 2,2'-methylenebis(4-methyl-6-t-butylphenol), 2,2'-bis(4-oxyphenyl)propane, 4,4'-isopropylidene-bis-(2-t-butylphenol), pyrogallol, phloroglucinol and phloroglucinol carboxylic acid.
Claim 19
Dependent Claim
22 words
An optical recording device according to claim 12, wherein said light-absorbing layer comprises a meltable light-absorbing dye or a sublimable light-absorbing dye.
Claim 20
Dependent Claim
31 words
An optical recording device according to claim 12, wherein said light-absorbing layer is selected from among metal phthalocyanines and derivatives thereof, xanthene type dyes, metal-containing azo dyes and acidic azo dyes.
Claim 21
Dependent Claim
23 words
An optical recording device according to claim 12, wherein said A-layer and B-layer have a thickness ranging from 200 Å to 10 μm.
Claim 22
Dependent Claim
22 words
An optical recording device according to claim 12, wherein said light-absorbing layer has a thickness ranging from 30 Å to 1000 Å.
Claim 23
Dependent Claim
107 words
An optical recording device according to claim 1 which comprises an A-layer comprising a chromogenic compound which is colorless or pale colored; a B-layer comprising an assistant compound capable of making said chromogenic compound form color through contact with said chromogenic compound; a light-absorbing layer, said three layers being laminated in this order; and a substrate, wherein at least the A-layer and the B-layer of said three layers being constituted of a monomolecular film or a built-up film thereof formed according to the Langmuir-Blodgett method, and the reactive sites of the assistant compound and the chromogenic compound being separated from each other through the non-reactive sites thereof.
Claim 24
Dependent Claim
19 words
An optical recording device according to claim 22, wherein said chromogenic compound is a leuco derivative of a dye.
Claim 25
Dependent Claim
27 words
An optical recording device according to claim 22, wherein said chromogenic compound is selected from triphenylmethane type, fluorane type, phenothiazine type, auramine type and spiropyrane type compounds.
Claim 26
Dependent Claim
27 words
An optical recording device according to claim 22, wherein said assistant compound is selected from aromatic sulfonic acid compounds, aromatic carboxylic acids and higher fatty carboxylic acids.
Claim 27
Dependent Claim
16 words
An optical recording device according to claim 22, wherein said assistant compound is a phenolic compound.
Claim 28
Dependent Claim
42 words
An optical recording device according to claim 26, wherein said phenolic compound is selected from among p-t-butylphenol, α-naphthol, β-naphthol, phenolphthalein, bisphenol-A, p-phenoxyphenol, 4-hydroxyacetophenone, 3,5-xylenol, thymol, hydroquinone, methyl 4-hydroxybenzoate, catechol, resorcinol, 4-t-octylcatechol, 4,4'-sec-butylidenediphenol, 2,2'-dihydroxydiphenyl, 2,2'-methylenebis(4-methyl-6-t-butylphenol), 2,2'-bis(4-oxyphenyl)propane, 4,4'-isopropylidene-bis(2-t-butylphenol), pyrogallol, phloroglucinol and phloroglucinol carboxylic acid.
Claim 29
Dependent Claim
22 words
An optical recording device according to claim 22, wherein said light-absorbing layer comprises a meltable light-absorbing dye or a sublimable light-absorbing dye.
Claim 30
Dependent Claim
31 words
An optical recording device according to claim 22, wherein said light-absorbing layer is selected from among metal phthalocyanines and derivatives thereof, xanthene type dyes, metal-containing azo dyes and acidic azo dyes.
Claim 31
Dependent Claim
23 words
An optical recording device according to claim 22, wherein said A-layer and B-layer have a thickness ranging from 200 Å to 10 μm.
Claim 32
Dependent Claim
22 words
An optical recording device according to claim 22, wherein said light-absorbing layer has a thickness ranging from 30 Å to 1000 Å.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |