Patent US5578415A successfully refreshed from Google Patents.
US5578415A
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US
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Optical recording materials, method for preparing the same and optical cards having the same
Assignee: Asahi Kasei Corp
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Filing: 1994-01-31
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Granted: 1996-11-26
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Expires: 2014-01-31
Abstract
Abstract An optical recording material comprising: a thin film or membrane of a hydrophobic binding agent; and metallic particles having a diameter of 0.003 μm to 3 μm dispersed in said film or membrane wherein the density of said metallic particles is higher near at least one surface of said film or membrane as compared with another portion of said film or membrane, each metallic particle having a nucleus and an outer coating, said outer coating consisting of at least one metal having a melting point of 250° C. to 1800° C. and a thermal conductivity at 0° C. of 5 W·m -1 ·K -1 to 450 W·m -1 ·K -1 wherein the reflectivity of the surface of said film or membrane where the density of said metallic particle is higher is 10 to 90%., a method for preparing the optical recording material and an optical card containing the optical recording material.
Inventors
- 👤 Yoshio Hayashi
- 👤 Shuichiro Ogawa
- 👤 Junichi Iwata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:26
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/243; G11B7/244; G11B7/245; G11B7/251; G11B2007/24302; G11B2007/24308; G11B2007/24318; G11B2007/2432; G11B2007/24324; G11B7/002; G11B7/0033; G11B7/24003; G11B7/24012; G11B7/252; G11B7/254; G11B7/2542; Y; Y10; Y10S; Y10S430/00; Y10S430/146; Y10S430/165
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
227 words
An optical recording material comprising: (1) a thin film having a luster layer that is continuous and uniform in the plane of the thin film near a surface of said thin film and a layer contiguous to said luster layer, wherein said thin film comprises (A) a hydrophobic binding agent selected from the group consisting of polyvinyl butyral, polymethyl methacrylate, polycarbonate, vinyl chloride-vinyl acetate copolymer, and polyisobutylene, and (B) metallic particles having a diameter of 0.003 μm to 3 μm dispersed in thin said film wherein the density of said metallic particles is higher near at least one surface of said thin film, thereby forming said luster layer that is continuous and uniform in the plane of the thin film near said thin film surface, wherein said luster layer that is continuous and uniform in the plane of the thin film has a reflectivity which is 10 to 90%, and is higher than the reflectivity of the layer contiguous to said luster layer, and wherein each metallic particle has a nucleus and an outer coating, wherein the metal of said outer coating is silver and wherein said nucleus comprises a metal more precious than silver or an alloy, sulfide, or oxide of said metal more precious than silver, and (2) a transparent protective film, sheet, or plate laminated on the luster layer surface of the thin film.
Claim 2
Dependent Claim
227 words
An optical recording material comprising: (1) a thin film having a luster layer that is continuous and uniform in the plane of the thin film near a surface of said thin film and a layer contiguous to said luster layer, wherein said thin film comprises (A) a hydrophobic binding agent selected from the group consisting of polyvinyl butyral, polymethyl methacrylate, polycarbonate, vinyl chloride-vinyl acetate copolymer, and polyisobutylene, and (B) metallic particles having a diameter of 0.003 μm to 3 μm dispersed in thin said film wherein the density of said metallic particles is higher near at least one surface of said thin film, thereby forming said luster layer that is continuous and uniform in the plane of the thin film near said thin film surface, wherein said luster layer that is continuous and uniform in the plane of the thin film has a reflectivity which is 10 to 90%, and is higher than the reflectivity of the layer contiguous to said luster layer, and wherein each metallic particle has a nucleus and an outer coating, wherein the metal of said outer coating is silver and wherein said nucleus comprises a metal more precious than silver or an alloy, sulfide, or oxide of said metal more precious than silver, and (2) a transparent protective film, sheet, or plate laminated on the luster layer surface of the thin film.
Claim 3
Dependent Claim
30 words
The optical recording material of claim 1, wherein the reflectivity of said luster layer that is continuous and uniform in the plane of the thin film is 25 to 60%.
Claim 4
Dependent Claim
101 words
The optical recording material of claim 1, wherein the reflectivity of said luster layer that is continuous and uniform in the plane of the thin film and the reflectivity of the layer of said thin film contiguous to said luster layer that is continuous and uniform in the plane of the film have the following relationship: ##EQU3## wherein X is the reflectivity of said luster layer that is continuous and uniform in the plane of the film; and Y is the reflectivity of said layer contiguous to said luster layer that is continuous and uniform in the plane of the film.
Claim 5
Dependent Claim
100 words
The optical recording material of claim 3, wherein the reflectivity of the luster layer that is continuous and uniform in the plane of the thin film and the reflectivity of the layer contiguous to said luster layer that is continuous and uniform in the plane of the thin film have the following relationship: ##EQU4## wherein X is the reflectivity of the luster layer that is continuous and uniform in the plane of the thin film; and Y is the reflectivity of the layer contiguous to said luster layer that is continuous and uniform in the plane of the thin film.
Claim 6
Dependent Claim
23 words
The optical recording material of claim 1, wherein the metal more precious than silver is palladium, platinum, gold, rhodium, ruthenium, thallium or mercury.
Claim 7
Dependent Claim
16 words
The optical recording material of claim 5, wherein the metal more precious than silver is palladium.
Claim 8
Dependent Claim
16 words
The optical recording material of claim 5, wherein the metal more precious than silver is gold.
Claim 9
Dependent Claim
16 words
The optical recording material of claim 5, wherein the metal more precious than silver is platinum.
Claim 10
Dependent Claim
20 words
The optical recording material of claim 1, wherein the hydrophobic binding agent is insoluble in water of about 60° C.
Claim 11
Dependent Claim
21 words
The optical recording material of claim 1, wherein the thin film additionally comprises a silver halide or a silver halide-forming agent.
Claim 12
Dependent Claim
59 words
The optical recording material of claim 10, which contains a silver halide-forming agent and wherein the silver halide-forming agent is a hydrogen halide, a metal halide, a halogen molecule, an organic N-haloamide, a diarylhalomethane, an ammonium halide, an organic halide compound of an element of Groups IV, V and VI of Periodic Table or a dihalide of triphenyl phosphite.
Claim 13
Dependent Claim
16 words
The optical recording material of claim 11, wherein the silver halide-forming agent is a metal halide.
Claim 14
Dependent Claim
24 words
The optical recording material of claim 1, wherein the thin film additionally comprises a light absorber in the wavelength region of a semiconductor laser.
Claim 15
Dependent Claim
15 words
The optical recording material of claim 13, wherein the light absorber is a phthalocyanine dye.
Claim 16
Dependent Claim
15 words
The optical recording material of claim 13, wherein the light absorber is an azulenium dye.
Claim 17
Dependent Claim
15 words
The optical recording material of claim 13, wherein the light absorber is a nickel-dithiol complex.
Claim 18
Dependent Claim
28 words
The optical recording material of claim 1, which additionally comprises a thin layer of a light absorber in the wavelength region of a semiconductor laser on its surface.
Claim 19
Dependent Claim
24 words
The optical recording material of claim 17, wherein the thickness of the thin layer of the light absorber is 500 Å to 5 μm.
Claim 20
Dependent Claim
16 words
The optical recording material of claim 1, wherein the thin film additionally comprises a toning agent.
Claim 21
Dependent Claim
13 words
The optical recording material of claim 19, wherein the toning agent is phthalazone.
Claim 22
Dependent Claim
20 words
The optical recording material of claim 1, wherein the thin film of the hydrophobic binding agent comprises an anti-fogging agent.
Claim 23
Dependent Claim
13 words
The optical recording material of claim 21, wherein the anti-fogging agent is 1,1,1',1'-tetrabromo-o-xylene.
Claim 24
Dependent Claim
20 words
The optical recording material of claim 1, wherein the thickness of the optical recording material is 1 to 20 μm.
Claim 25
Dependent Claim
13 words
The optical recording material of claim 1, which is provided on a substrate.
Claim 26
Dependent Claim
22 words
The optical recording material of claim 24, wherein the substrate is a film, sheet or plate of a metal, glass or plastic.
Claim 27
Dependent Claim
20 words
The optical recording material of claim 24, wherein a film or sheet of a plastic is laminated on the substrate.
Claim 28
Dependent Claim
20 words
The optical recording material of claim 1, wherein the information to be read is prerecorded in the optical recording material.
Claim 29
Dependent Claim
23 words
The optical recording material of claim 27, wherein the information to be read is prerecorded in a part of the optical recording material.
Claim 30
Dependent Claim
21 words
The optical recording material of claim 27, wherein the information to be read is prerecorded in the entire optical recording material.
Claim 31
Dependent Claim
11 words
An optical card having the optical recording material of claim 1.
Claim 32
Dependent Claim
18 words
The optical card of claim 30, wherein information to be read is prerecorded in the optical recording material.
Claim 33
Dependent Claim
22 words
The optical card of claim 31, wherein the information to be read is prerecorded in a part of the optical recording material.
Claim 34
Dependent Claim
10 words
The optical card of claim 30 additionally comprising analog information.
Claim 35
Dependent Claim
19 words
The optical card of claim 33, wherein the analog information is to identify the owner of the optical card.
Claim 36
Dependent Claim
34 words
The optical card of claim 33, wherein the optical recording material is provided on one surface of the optical card and the analog information is provided on the other surface of the optical card.
Claim 37
Dependent Claim
12 words
The optical card of claim 30 further comprising a magnetic recording material.
Claim 38
Dependent Claim
35 words
The optical card of claim 36, wherein the optical recording material is provided on one surface of the optical card and the magnetic recording material is provided on the other surface of the optical card.
Claim 39
Dependent Claim
37 words
The optical card of claim 36, wherein the optical recording material is provided on one surface of the optical card and analog information and magnetic recording material are provided on the other surface of the optical card.
Claim 40
Dependent Claim
18 words
The optical card of claim 36, wherein information to be read is prerecorded in the magnetic recording material.
Claim 41
Dependent Claim
11 words
The optical card of claim 30 further comprising an integrated circuit.
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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) | 1999-11-26 | 2000-05-27 | 2000-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-26 | 2004-05-27 | 2004-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-26 | 2008-05-27 | 2008-11-26 | $7700.00 | Window Closed / Lapsed |