US4499178A
Expired / Lapsed
US
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Optical information recording material
Assignee: Fujifilm Holdings Corp
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Filing: 1982-06-14
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Granted: 1985-02-12
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Expires: 2002-06-14
Abstract
Abstract An optical information recording material which comprises a substrate having thereon a heat mode recording layer made of a metal and a metal compound that increases the sensitivity of said recording layer and decreases the reflectivity of said recording layer, a reflecting layer made of a metal, and a heat insulating layer interposed between said recording layer and said reflecting layer. The material makes it possible to record information at high sensitivity and read recorded information by reflected light at high contrast.
Inventors
- 👤 Minoru Wada
- 👤 Yonosuke Takahashi
- 👤 Eiichi Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:16
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/252; G11B7/258; G11B7/242; G11B7/243; G11B7/257; G11B7/2572; G11B2007/24302; G11B2007/24304; G11B2007/24306; G11B2007/24308; G11B2007/2431; G11B2007/24312; G11B2007/24314; G11B2007/24316; G11B2007/24318; G11B2007/2432; G11B2007/24324; G11B2007/24326; G11B2007/25705; G11B2007/2571; G11B2007/25715; G11B7/2585; G11B7/259; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/146; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
227 words
An optical information recording material which comprises a substrate having thereon a heat mode recording layer made of a metal and a metal compound that increases the sensitivity of said recording layer and decreases the reflectivity of said recording layer, the metal compound being selected from the group consisting of CrS, Cr 2 S, Cr 2 S 3 , MoS 2 , MnS, FeS, FeS 2 , CoS, Co 2 S 3 , NiS, Ni 2 S, PdS, Cu 2 S, Ag 2 S, In 2 S 3 , InS, GeSx (1≦×≦2), SnS, SnS 2 , PbS, As 2 S 3 , Sb 2 S 3 , Bi 2 S 3 , MgF 2 , CaF 2 , RhF 3 , MoO, InO, In 2 O 3 , GeO, PbO, SnO, and SnO 2 , the metal being selected from the group consisting of Mg, Sc, Y, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Re, Fe, Co, Ni, Ru, Rh, Pd, Ir, Pt, Cu, Ag, Au, Zn, Cd, Al, Ga, In, Si, Ge, Sn, As, Sb, Bi, Se, Te, mixtures thereof, and alloys thereof, a reflecting layer made of a metal wherein the metal used in said reflecting layer is a metal which can be used in said recording layer, and a heat insulating layer interposed between said recording layer and said reflecting layer.
Claim 2
Dependent Claim
227 words
An optical information recording material which comprises a substrate having thereon a heat mode recording layer made of a metal and a metal compound that increases the sensitivity of said recording layer and decreases the reflectivity of said recording layer, the metal compound being selected from the group consisting of CrS, Cr 2 S, Cr 2 S 3 , MoS 2 , MnS, FeS, FeS 2 , CoS, Co 2 S 3 , NiS, Ni 2 S, PdS, Cu 2 S, Ag 2 S, In 2 S 3 , InS, GeSx (1≦×≦2), SnS, SnS 2 , PbS, As 2 S 3 , Sb 2 S 3 , Bi 2 S 3 , MgF 2 , CaF 2 , RhF 3 , MoO, InO, In 2 O 3 , GeO, PbO, SnO, and SnO 2 , the metal being selected from the group consisting of Mg, Sc, Y, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Re, Fe, Co, Ni, Ru, Rh, Pd, Ir, Pt, Cu, Ag, Au, Zn, Cd, Al, Ga, In, Si, Ge, Sn, As, Sb, Bi, Se, Te, mixtures thereof, and alloys thereof, a reflecting layer made of a metal wherein the metal used in said reflecting layer is a metal which can be used in said recording layer, and a heat insulating layer interposed between said recording layer and said reflecting layer.
Claim 3
Dependent Claim
39 words
An optical information recording material as claimed in claim 1, wherein the metal compound of the recording layer is present in an amount of about 10 to 70 vol % based on the total volume of the recording layer.
Claim 4
Dependent Claim
26 words
An optical information recording material as claimed in claim 1, wherein the recording layer is composed of a mixture of a metal and a metal compound.
Claim 5
Dependent Claim
37 words
An optical information recording material as claimed in claim 1, wherein the recording layer is composed of at least one metal layer and at least one layer of the compound, said layers being laminated one over another.
Claim 6
Dependent Claim
23 words
An optical information recording material as claimed in claim 1, wherein the recording layer has a thickness of from 30 to 1500 Å.
Claim 7
Dependent Claim
23 words
An optical information recording material as claimed in claim 1, wherein the reflecting layer is Rh, Pd, Pt, Ag, Al, In, or Sn.
Claim 8
Dependent Claim
27 words
An optical information recording material as claimed in any of claims 1 or 2, wherein the reflecting layer has a thickness of about 300 to 3000 Å.
Claim 9
Dependent Claim
24 words
An optical information recording material as claimed in claim 1, wherein the heat insulating layer has a thermal conductivity lower than 0.01 Joule/cm.sec.° C.
Claim 10
Dependent Claim
36 words
An optical information recording material as claimed in claim 1, wherein the heat insulating layer is made of polyester, polyethylene, polystyrene, acrylic polymer, cellulose acetate, cellulose nitrate, brominated polyhydroxystyrene, chlorinated rubber, SiO, or SiO 2 .
Claim 11
Dependent Claim
28 words
An optical information recording material as claimed in any of claims 1 or 2, wherein the heat insulating layer has a thickness of about 0.01 to 5 μm.
Claim 12
Dependent Claim
20 words
An optical information recording material as claimed in claim 1, further comprising a protective layer formed on the recording material.
Claim 13
Dependent Claim
23 words
An optical information recording material as claimed in claim 11, wherein the protective layer has a thickness of from 0.001 to 1 μm.
Claim 14
Dependent Claim
31 words
An optical information recording material as claimed in claim 1, wherein the reflecting layer, the heat insulating layer, and the recording layer are formed on the substrate in the order listed.
Claim 15
Dependent Claim
36 words
An optical information recording material as claimed in claim 1, wherein the substrate is transparent and the recording layer, the heat insulating layer, and the reflecting layer are formed on the substrate in the order listed.
Claim 16
Dependent Claim
39 words
An optical information recording material as claimed in claim 2, wherein the metal compound of the recording layer is present in an amount of about 20 to 50 vol % based on the total volume of the recording layer.
Claim 17
Dependent Claim
23 words
An optical information recording material as claimed in claim 7, wherein the reflecting layer has a thickness of about 500 to 2000 Å.
Claim 18
Dependent Claim
24 words
An optical information recording material as claimed in claim 10, wherein the heat insulating layer has a thickness of about 0.05 to 2 μm.
Claim 19
Independent Claim
241 words
A method for recording information comprising irradiating a light beam on an optical information recording material which comprises a heat mode recording layer made of a metal and a metal compound that increases the sensitivity of said recording layer and decreases the reflectivity of said recording layer, the metal compound being selected from the group consisting of CrS, Cr 2 S, Cr 2 S 3 , MoS 2 , MnS, FeS, FeS 2 , CoS, Co 2 S 3 , NiS, Ni 2 S, PdS, Cu 2 S, Ag 2 S, In 2 S 3 , InS, GeSx (1≦×≦2), SnS, SnS 2 , PbS, As 2 S 3 , Sb 2 S 3 , Bi 2 S 3 , MgF 2 , CaF 2 , RhF 3 , MoO, InO, In 2 O 3 , GeO, PbO, SnO, and SnO 2 , the metal being selected from the group consisting of Mg, Sc, Y, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Re, Fe, Co, Ni, Ru, Rh, Pd, Ir, Pt, Cu, Ag, Au, Zn, Cd, Al, Ga, In, Si, Ge, Sn, As, Sb, Bi, Se, Te, mixtures thereof, and alloys thereof, a reflecting layer made of a metal wherein the metal used in said reflecting layer is a metal which can be used in said recording layer, and a heat insulating layer interposed between said recording layer and said reflecting layer, said layers being supported on a substrate.
Claim 20
Independent Claim
241 words
A method for recording information comprising irradiating a light beam on an optical information recording material which comprises a heat mode recording layer made of a metal and a metal compound that increases the sensitivity of said recording layer and decreases the reflectivity of said recording layer, the metal compound being selected from the group consisting of CrS, Cr 2 S, Cr 2 S 3 , MoS 2 , MnS, FeS, FeS 2 , CoS, Co 2 S 3 , NiS, Ni 2 S, PdS, Cu 2 S, Ag 2 S, In 2 S 3 , InS, GeSx (1≦×≦2), SnS, SnS 2 , PbS, As 2 S 3 , Sb 2 S 3 , Bi 2 S 3 , MgF 2 , CaF 2 , RhF 3 , MoO, InO, In 2 O 3 , GeO, PbO, SnO, and SnO 2 , the metal being selected from the group consisting of Mg, Sc, Y, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Re, Fe, Co, Ni, Ru, Rh, Pd, Ir, Pt, Cu, Ag, Au, Zn, Cd, Al, Ga, In, Si, Ge, Sn, As, Sb, Bi, Se, Te, mixtures thereof, and alloys thereof, a reflecting layer made of a metal wherein the metal used in said reflecting layer is a metal which can be used in said recording layer, and a heat insulating layer interposed between said recording layer and said reflecting layer, said layers being supported on a substrate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |