Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D221/00—Heterocyclic compounds containing six-membered rings having one nitrogen atom as the only ring hetero atom, not provided for by groups C07D211/00 - C07D219/00
  • C07D221/02—Heterocyclic compounds containing six-membered rings having one nitrogen atom as the only ring hetero atom, not provided for by groups C07D211/00 - C07D219/00 condensed with carbocyclic rings or ring systems
  • C07D221/04—Ortho- or peri-condensed ring systems
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D217/00—Heterocyclic compounds containing isoquinoline or hydrogenated isoquinoline ring systems
  • C07D217/12—Heterocyclic compounds containing isoquinoline or hydrogenated isoquinoline ring systems with radicals, substituted by hetero atoms, attached to carbon atoms of the nitrogen-containing ring
  • C07D217/14—Heterocyclic compounds containing isoquinoline or hydrogenated isoquinoline ring systems with radicals, substituted by hetero atoms, attached to carbon atoms of the nitrogen-containing ring other than aralkyl radicals
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
  • C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
  • C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
  • C07D311/06—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 2
  • C07D311/08—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 2 not hydrogenated in the hetero ring
  • C07D311/12—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 2 not hydrogenated in the hetero ring substituted in position 3 and unsubstituted in position 7
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
  • C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
  • C07D311/78—Ring systems having three or more relevant rings
  • C07D311/80—Dibenzopyrans; Hydrogenated dibenzopyrans
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
  • C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
  • C07D405/04—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D455/00—Heterocyclic compounds containing quinolizine ring systems, e.g. emetine alkaloids, protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine
  • C07D455/03—Heterocyclic compounds containing quinolizine ring systems, e.g. emetine alkaloids, protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine containing quinolizine ring systems directly condensed with at least one six-membered carbocyclic ring, e.g. protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine
  • C07D455/04—Heterocyclic compounds containing quinolizine ring systems, e.g. emetine alkaloids, protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine containing quinolizine ring systems directly condensed with at least one six-membered carbocyclic ring, e.g. protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine containing a quinolizine ring system condensed with only one six-membered carbocyclic ring, e.g. julolidine
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D491/00—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00
  • C07D491/02—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00 in which the condensed system contains two hetero rings
  • C07D491/04—Ortho-condensed systems
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F15/00—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
  • C07F15/06—Cobalt compounds
  • C07F15/065—Cobalt compounds without a metal-carbon linkage
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
  • C09B23/0091—Methine or polymethine dyes, e.g. cyanine dyes having only one heterocyclic ring at one end of the methine chain, e.g. hemicyamines, hemioxonol
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
  • C09B23/02—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups
  • C09B23/04—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups one >CH- group, e.g. cyanines, isocyanines, pseudocyanines
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
  • C09B23/10—The polymethine chain containing an even number of >CH- groups
  • C09B23/105—The polymethine chain containing an even number of >CH- groups two >CH- groups
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B29/00—Monoazo dyes prepared by diazotising and coupling
  • C09B29/0025—Monoazo dyes prepared by diazotising and coupling from diazotized amino heterocyclic compounds
  • C09B29/0029—Monoazo dyes prepared by diazotising and coupling from diazotized amino heterocyclic compounds the heterocyclic ring containing only nitrogen as heteroatom
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B29/00—Monoazo dyes prepared by diazotising and coupling
  • C09B29/0025—Monoazo dyes prepared by diazotising and coupling from diazotized amino heterocyclic compounds
  • C09B29/0074—Monoazo dyes prepared by diazotising and coupling from diazotized amino heterocyclic compounds the heterocyclic ring containing nitrogen and sulfur as heteroatoms
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B29/00—Monoazo dyes prepared by diazotising and coupling
  • C09B29/34—Monoazo dyes prepared by diazotising and coupling from other coupling components
  • C09B29/36—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B44/00—Azo dyes containing onium groups
  • C09B44/10—Azo dyes containing onium groups containing cyclammonium groups attached to an azo group by a carbon atom of the ring system
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B47/00—Porphines; Azaporphines
  • C09B47/04—Phthalocyanines abbreviation: Pc
  • C09B47/045—Special non-pigmentary uses, e.g. catalyst, photosensitisers of phthalocyanine dyes or pigments
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B47/00—Porphines; Azaporphines
  • C09B47/04—Phthalocyanines abbreviation: Pc
  • C09B47/08—Preparation from other phthalocyanine compounds, e.g. cobaltphthalocyanineamine complex
  • C09B47/085—Preparation from other phthalocyanine compounds, e.g. cobaltphthalocyanineamine complex substituting the central metal atom
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B47/00—Porphines; Azaporphines
  • C09B47/04—Phthalocyanines abbreviation: Pc
  • C09B47/08—Preparation from other phthalocyanine compounds, e.g. cobaltphthalocyanineamine complex
  • C09B47/24—Obtaining compounds having —COOH or —SO3H radicals, or derivatives thereof, directly bound to the phthalocyanine radical
  • C09B47/26—Amide radicals
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
  • C09K9/00—Tenebrescent materials, i.e. materials for which the range of wavelengths for energy absorption is changed as a result of excitation by some form of energy
  • C09K9/02—Organic tenebrescent materials
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
  • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
  • G11B7/0045—Recording
  • G11B7/00455—Recording involving reflectivity, absorption or colour changes
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
  • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
  • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
  • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
  • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
  • G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
  • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
  • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
  • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
  • G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
  • G11B7/246—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes
  • G11B7/247—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes methine or polymethine dyes
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
  • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
  • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
  • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
  • G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
  • G11B7/246—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes
  • G11B7/248—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes porphines; azaporphines, e.g. phthalocyanines
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
  • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
  • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
  • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
  • G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
  • G11B7/249—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing organometallic compounds
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
  • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
  • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
  • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
  • G11B7/254—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
  • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
  • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
  • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track

Definitions

• the invention relates to a write-once optical data carrier, which in the
• Information layer contains a cyclizable, light-absorbing compound, as well as a process for the production of the optical data carriers, their use and still new cyclizable light-absorbing compounds.
• the write-once optical data carriers using special light-absorbing substances or mixtures thereof are particularly suitable for use with high-density writable optical data storage devices that work with blue laser diodes, in particular GaN or SHG laser diodes (360 - 460 nm) and / or for use with DVD-R or CD-R discs that work with red (635 - 660 nm) or infrared (780 - 830 nm) laser diodes, as well as the application of the above-mentioned dyes to a polymer substrate, in particular polycarbonate, by spin coating or vapor deposition.
• blue laser diodes in particular GaN or SHG laser diodes (360 - 460 nm) and / or for use with DVD-R or CD-R discs that work with red (635 - 660 nm) or infrared (780 - 830 nm) laser diodes, as well as the application of the above-mentioned dyes to a polymer substrate,
• the next generation of optical data storage media - the DVD - is currently being launched on the market.
• the storage density can be increased by using shorter-wave laser radiation (635 to 660 nm) and a higher numerical aperture NA.
• the recordable format in this case is the DVD-R.
• the writable information layer made of light-absorbing organic substances must have a morphology which is as amorphous as possible in order to keep the noise signal as small as possible when writing or reading.
• the substances are applied by spin coating from a solution, by vapor deposition and / or sublimation, subsequent crystallization of the light-absorbing substances with metallic or dielectric layers in vacuum is prevented.
• the amorphous layer of light-absorbing substances should preferably have a high heat resistance, since otherwise further layers of organic or inorganic material, which are applied to the by sputtering or vapor deposition light-absorbing information layer are applied, form diffuse interfaces by diffusion and thus adversely affect the reflectivity.
• a light-absorbing substance with too low heat resistance at the interface to a polymeric carrier can diffuse in the latter and in turn adversely affect the reflectivity.
• An excessively high vapor pressure of a light-absorbing substance can sublimate the above-mentioned sputtering or vapor deposition of further layers in a high vacuum and thus reduce the desired layer thickness. This in turn leads to a negative influence on the reflectivity.
• the object of the invention is therefore to provide suitable compounds which meet the high requirements (such as light stability, favorable signal-to-noise ratio, damage-free application to the substrate material, etc.) for use in the information layer in a write-once optical data carrier, in particular for high-density recordable optical media Meet data storage formats in a laser wavelength range from 360 to 460 nm.
• the invention therefore relates to an optical data carrier, comprising a preferably transparent substrate, possibly already coated with a protective layer, on the surface of which an information layer which can be written on with light, optionally a protective layer, optionally an adhesive layer and finally a cover layer which is coated with blue light are applied , preferably laser light, particularly preferably light with 360-460 nm, in particular 380-440 nm, very particularly preferably at 395-415 nm can be written and read, the information layer containing a light-absorbing compound and optionally a binder, characterized in that the light absorbing compound has a chemical arrangement that cyclizes thermally to 5, 6 or 7 rings when written.
• the light-absorbing compound should preferably be caused to shift the local absorption maximum in the range of 350-470 nm by the thermal cyclization of the chemical arrangement.
• the shift is more than 25 nm ( ⁇ max), particularly preferably more than 35 nm, very particularly preferably more than 45 nm.
• the shift is preferably hypsochromic.
• the thermal change is preferably carried out at a temperature ⁇ 600 ° C., particularly preferably at a temperature ⁇ 400 ° C., very particularly preferably at a temperature ⁇ 300 ° C., in particular ⁇ 200 ° C.
• the thermal cyclization is likewise preferably carried out only at a temperature of> 100 ° C., in particular> 140 ° C., preferably at> 180 ° C.
• the cyclization temperature T C y C is determined, for example, by means of differential thermal analysis DTA. In the preferred exothermic cyclization, it corresponds to the maximum of the rearrangement signal.
• the heating rate for DTA measurements is, for example, 10 ° C per minute.
• the full width at half maximum of the rearrangement signal under these conditions is preferably less than 10 ° C., particularly preferably less than 7 ° C., very particularly preferably less than 5 ° C.
• Half-width in the sense of the invention is the width of the signal that the signal has halfway up from the base point to the maximum.
• a compound which has a chemical arrangement which can thermally cyclize to 5-, 6- or 7-rings is preferably used as the light-absorbing compound.
• a compound which corresponds to the formula (I) or (II) is particularly preferably used as the light-absorbing compound.
• X 1 represents NR 1 , O or S
• X 2 represents CR 2 or N
• X 3 represents CR 3 or N
• X 4 represents CR 4 or N
• X 3 is CR D or N, where in the row X ⁇ 2 - no two nitrogen atoms are adjacent X5 v D - v X3 J - v X
• n, m independently of one another represent 0 or 1
• R 1 is hydrogen, Ci to C 6 alkyl, Ci to C 6 alkenyl, Ci to C 6 alkynyl, C 4 to C 7 cycloalkyl, C 7 to Cis aralkyl, Ci to C 6 -alkoxycarbonyl, aryl or
• Hetaryl where the hetaryl radical can contain up to 3 heteroatoms and the aryl or hetaryl radical can be substituted by up to 3 nonionic radicals,
• R 2 represents hydrogen, bromine, Ci to C 6 alkyl, Ci to C 6 alkenyl, Ci to C 6 alkynyl, C 6 to C 10 aryl, C 7 to s-araryl, hetaryl, Ci to C 6 alkoxy, mono- or di-Cr to C 6 alkylamino, N-Ci to C 6 alkyl-NC 6 to C 10 arylamino or with R 1 together part of a five- or sixth is a membered aromatic or partially hydrogenated ring which may contain 1 to 4 heteroatoms or carbonyl groups and / or benzene or naphthane fused and / or may be substituted by nonionic, preferably electron donor,
• R 3 for hydrogen, Cj to C 6 alkyl, Ci to C 6 alkenyl, C 6 to C 10 aryl, C 7 to C 15 araryl, hetaryl, Ci to C 6 alkoxycarbonyl, formyl , Cyano, nitro, halogen or together with R 2 is part of a five- or six-membered aromatic or partially hydrogenated ring which may contain 1 to 4 heteroatoms or carbonyl groups and / or benzylated or naphthanellated and / or their rings by nonionic radicals can be substituted
• R 4 for hydrogen, amino, bromine, Ci to C 6 alkyl, Cr to C 6 alkenyl, Ci to
• Alkyl-NC 6 - to Qo-arylamino or together with R 3 is part of a five- or is a 6-membered aromatic or partially hydrogenated ring which may contain 1 to 4 heteroatoms or carbonyl groups and / or benzylated or naphthanellated and / or substituted by nonionic, preferably electron donor,
• Residues can be substituted,
• R 6 represents hydrogen, bromine, chlorine, methoxy or ethoxy
• R 7 represents hydrogen, bromine, chlorine or methoxy if R 6 represents methoxy or represents ethoxy if R 6 represents ethoxy,
• R 8 represents bromine, chlorine, iodine, cyano, tosylate, trifiate, Ci to C 6 alkanoyloxy, C to C 6 alkylthio or represents methoxy if R 7 represents methoxy or represents ethoxy if R 7 represents ethoxy,
• R 9 , R 10 and R n independently of one another for Ci to C 6 alkoxy, chlorine, bromine, iodine, Ci to C 6 alkanoyloxy, Ci to C 6 alkylthio, C 6 to o-aryloxy, C 6 - are to Cio-arylcarbonylamino or one of these radicals together with R 5 is part of a five- or six-membered aromatic or partially hydrogenated ring which
• R 12 is hydrogen, Ci to C 6 alkyl, d to C 6 alkenyl, Q to C 6 alkynyl, C 4 to C 7 cycloalkyl, C 7 to C 15 aralkyl, Ci to C 6 alkoxycarbonyl, aryl or Hetaryl, where the hetaryl radical can contain up to 3 heteroatoms and the aryl or hetaryl radical can be substituted by up to 3 nonionic radicals,
• R 13 5 R 14 , R 17 , R 18 , R 21 and R 22 independently of one another represent hydrogen, CC 3 alkyl, fluorine, chlorine or bromine,
• R 16 and R 20 independently of one another for hydrogen, d- to C 6 - alkyl, Ci to C 6 -
• R 24 stands for O, S or NR 35 ,
• R 26 , R 29 , R 32 and R 35 independently of one another are hydrogen, Ci to C 6 alkyl, Ci to C 6 alkenyl, C to C 6 alkynyl, C 4 to C 7 cycloalkyl, C 7 - to cis
• Aralkyl, Ci- to C 6 alkoxycarbonyl are, aryl or hetaryl, wherein the hetaryl radical can contain up to 3 hetero atoms, and the aryl or
• Hetarylrest can be substituted by up to 3 nonionic residues and R 27 , R 28 , R 30 , R 31 , R 33 and R 34 independently of one another for hydrogen, C r to C 6 alkyl, Ci to C 6 alkenyl, C 4 to C 7 cycloalkyl, C 7 to Cis-aralkyl, aryl or hetaryl, where the hetaryl radical can contain up to 3 heteroatoms and the aryl or hetaryl radical can be substituted by up to 3 nonionic radicals.
• X 1 , X 2 , X 3 , X 4 , X 5 , X 7 , X 8 , X 9 , n and m have the meaning given above.
• R 6 , R 7 and R 12 have the meaning given above.
• nonionic radicals are Ci to C alkyl, Ci to C 6 alkoxy, halogen, cyano, nitro, d to C alkoxycarbonyl, Ci to C alkylthio, Ci to C 4 Alkanoylamino, benzoylamino, mono- or di-d to C -alkylamino, Ci- to C 6 -alkanoyloxy, l- (l, 2,3) triazole and 2- (l, 2,3) triazole in question.
• Electron donor residues are, for example, Ci to C 4 alkoxy, C 6 to Cio aryloxy, mono- or di-d to C 6 alkylamino, Nd to C 6 alkyl-NC 6 to do-arylamino.
• hetaryl examples include pyrrole, thiophene, furan, oxazole, isoxazole, imidazole, pyrazole, thiazole, isothiazole, pyridine, pyrimidine, pyridazine, pyrazine, 1,2,3-triazole, 1, 2,4-triazole and their benzene-fused representatives Question.
• Hetaryl in the sense of the invention are also piperidine, pyrrolidine, morpholine, piperazine and chroman.
• Alkyl, alkoxy, aryl and heterocyclic radicals can optionally further radicals such as alkyl, halogen, nitro, cyano, CO-NH 2 , alkoxy, trialkylsilyl,
• the alkyl and alkoxy radicals can be straight-chain or branched, the alkyl radicals can be partially or perhalogenated, the alkyl and alkoxy radicals can be methoxylated, ethoxylated or propoxylated or silylated, adjacent alkyl and or alkoxy radicals on aryl or heterocyclic radicals can together form a three- or four-membered bridge and the heterocyclic radicals can be benzannellated and / or quaternized.
• the light-absorbing compounds of the formula I used are those which correspond to the formula (III) (the group capable of cyclization is highlighted in bold).
• R > 45 represents hydrogen, bromine, chlorine, Ci to C alkyl, Cj to C 4 alkoxy, cyano, Ci to C alkoxycarbonyl, mono- or di Cj to C 4 alkylamino,
• R 46 , R 47 , R 48 and R 49 independently of one another for hydrogen, methyl, ethyl, Ci to C 6 - alkoxy, fluorine, chlorine, bromine, cyano, nitro, Ci to C -alkoxycarbonyl, mono- or di- d to C alkylamino,
• R 50 represents hydrogen, methyl, cyano, C 1 -C 6 -alkoxycarbonyl, formyl, bromine, chlorine,
• R > 51 for hydrogen, methyl, bromine, amino, N-methylamino, dimethylamino,
• R, 52 stands for cyano, C] - to d-alkoxycarbonyl, C 6 - to do-aryloxycarbonyl, Cj- to C 6 -alkanoyloxycarbonyl and
• X 6 represents cyano, Ci to C 6 alkoxycarbonyl, C 6 to C 10 aryloxycarbonyl, Ci to C 6 alkanoyloxycarbonyl or -CH 2 -O-SO 2 - ⁇ - C 6 H -CH 3 .
• the dyes of the formula (III) are very particularly preferred Wonn
• R 45 represents hydrogen, methyl, ethyl, isopropyl
• R 46 , R 49 represents hydrogen
• R 47 , R 48 independently of one another represent hydrogen, Ci to C 6 alkoxy, mono- or di-Ci to C 4 alkylamino,
• R 50 is hydrogen, methyl, cyano, Ci to C ö alkoxycarbonyl,
• R 51 represents hydrogen, methyl, amino, N-methylamino, dimethylamino, methoxy, ethoxy,
• X 6 for cyano Ci to C 6 alkoxycarbonyl, C 6 to Cio aryloxycarbonyl, Ci to C 6 alkanoyloxycarbonyl, -CH 2 -O-SO 2 - . pC 6 H -CH 3 .
• the light-absorbing compounds of the formula (III) are particularly preferred,
• R 45 , R 46 , R 49 represents hydrogen
• R 47 , R 48 independently of one another represent hydrogen, C 1 -C 3 -alkoxy, mono- or di-C 1 to d-alkylamino,
• R> 50 ⁇ R51 stands for hydrogen
• R 52 is cyano
• Ci to C stands 6 and alkanoyloxycarbonyl
• X 6 represents cyano, Ci to C 6 alkoxycarbonyl, C 6 to do aryloxycarbonyl.
• ⁇ 6a represents c-NH, CO or CH 2 .
• the light-absorbing compounds of the formula I used are those which correspond to the formula (IV)
• R 66 represents hydrogen, bromine, chlorine, d to C alkyl, Ci to C 6 alkoxy, cyano, d to C alkoxycarbonyl, mono- or di-d to C 4 alkylamino,
• R, R, R and R independently of one another are hydrogen, methyl, ethyl, isopropyl, d- to C 6 -alkoxy, fluorine, chlorine, bromine, cyano, nitro, d- to C 4 -alkoxycarbonyl, mono- or di Ci bis C 4 alkylamino, d- to C 4 -
• R can additionally stand for l, 2,3-triazol-2-yl, which can also be benzene-fused or naphthane-fused at the 4,5-position,
• R 72 represents O, NH, N-Ci to NC 3 alkyl
• R 73 represents O, Nd to NC 6 alkyl, NC 6 to C 10 aryl,
• Hetaryl stands, where the hetaryl residue can contain up to 3 heteroatoms and the aryl or hetaryl radical can be substituted by up to 3 nonionic radicals.
• R 66 represents hydrogen, Ci to C 4 alkyl, Ci to C 6 alkoxy, cyano, mono- or di- Ci to C alkylamino,
• R 67 represents hydrogen, d- to C 6 alkyl, C 6 - to C 10 -aryl, hetaryl, Ci to C 6 - alkoxycarbonyl, formyl, cyano, nitro, halogen,
• R 68 , R 71 stand for hydrogen
• R 68 , R 69 can additionally form a butadiene bridge
• R 69 and R 70 independently of one another represent hydrogen, methyl, Ci to C 2 alkoxy, chlorine, Ci to C 2 alkoxycarbonyl, mono- or di Ci to C 4 alkylamino, d- to C -alkanoyloxy,
• R 70 can additionally represent l 5 2,3-triazol-2-yl, which can also be benzene-fused or naphthane-fused at the 4,5-position,
• R 72 represents O or NH
• R 73 stands for O
• R 66 , R 67 , R 68 and R 71 represent hydrogen
• R 69 and R 70 independently of one another are hydrogen, methyl, Ci to C 2 alkoxy,
• R 72 represents O or NH
• X> -6 D is cyano, Ci to C 6 alkoxycarbonyl, C 6 - to Cio-aryloxycarbonyl and is
• R> 7 "5 represents hydrogen, d- to C 6 -alkyl, C 5 - to C 6 -cycloalkyl, C 7 - to -CC 5 aralkyl, Ci to C 6 - alkoxycarbonyl, aryl.
• R 68 - R 73 and R 75 have the meaning given above and
• the thermally cyclizable dye used is one of the formula (V)
• X 1 represents NR 1 , O or S
• R is hydrogen, Ci to C 6 alkyl, Ci to C 6 alkenyl, Ci to C 6 alkynyl, C to C 7 cycloalkyl, C 7 to C 5 aralkyl, Ci to C 6 Alkoxycarbonyl, aryl or hetaryl, where the hetaryl radical can contain up to 3 heteroatoms and the aryl or hetaryl radical can be substituted by up to 3 nonionic radicals,
• R 85 , R 86 , R 87 , R 88 independently of one another are hydrogen, methyl, ethyl, isopropyl, Ci to C 6 alkoxy, fluorine, chlorine, bromine, cyano, nitro, Ci to C 4 alkoxycarbonyl, Mono- or Di Ci to C 4 alkylamino, Ci to C alkanoyloxy or 2 adjacent radicals form a butadiene bridge, R 87 can additionally stand for l, 2,3-triazol-2-yl, which can also be benzene-fused or naphthane-fused at the 4,5-position,
• R > 8 a 9 y represents O, NH, N-Ci to NC 3 alkyl
• R > 9 y 0 ⁇ is O, N-Ci to C 6 alkyl or NC 6 to C 10 aryl
• R 95 represents hydrogen, Ci to C 6 alkyl, Ci to C 6 alkenyl, C 4 to C 7 cycloalkyl,
• R 98 represents hydrogen, bromine, chlorine, methoxy or ethoxy
• R 99 stands for hydrogen, bromine, chlorine or for methoxy if R 98 stands for methoxy or stands for ethoxy if R 98 stands for ethoxy,
• R 100 represents leaving groups such as bromine, chlorine, iodine, cyano, tosylate, triflate, Ci to C 6 alkanoyloxy, Ci to C 6 alkylthio or represents methoxy if R 99 represents methoxy or represents ethoxy if R 99 represents ethoxy, R 101 , R 102 and R 103 for d- to C 6 -alkoxy, chlorine, bromine, iodine, d- to C 6 -alkanoyloxy 5 Cj- to C 6 -alkylthio, C 6 - to Cio-aryloxy, C 6 - to Cio-arylcarbonylamino and
• R 104 for hydrogen, Ci to C 6 alkyl, d to C 6 alkenyl, d to C 6 alkynyl, C 4 to C 7 cycloalkyl, C to C 5 aralkyl, Ci to C 6 -alkoxycarbonyl, aryl or hetaryl, where the hetaryl radical can contain up to 3 heteroatoms and the aryl or hetaryl radical can be substituted by up to 3 nonionic radicals.
• X 1 represents NR 1 , O or S
• R 1 represents hydrogen, Ci to C 6 alkyl, C 5 to C 6 cycloalkyl, C r to C 6 alkoxycarbonyl, aryl,
• R 85 and R 88 independently represent hydrogen or
• R 85 and R 86 can additionally form a butadiene bridge or
• R 86 and R 87 independently of one another are hydrogen, methyl, ethyl, isopropyl, d- 25 to C 6 -alkoxy, chlorine, bromine, cyano, nitro, d- to C 4 -alkoxycarbonyl,
• Ci Mono- or Di Ci to C 4 alkylamino, Ci to C alkanoyloxy, or
• R 87 can additionally stand for l, 2,3-triazol-2-yl, which can also be benzene-fused or naphthane-fused at the 4,5-position,
• R, 8 ⁇ 9 y represents O or NH
• R 90 stands for O
• R 93 stands for O
• R 98 and R 99 represent hydrogen
• R 100 for leaving groups such as bromine, chlorine, iodine, cyano, tosylate, triflate, Ci bis
• R 101 and R 102 independently of one another for Cj to C 6 alkoxy, chlorine, bromine, iodine, Ci to C 6 alkanoyloxy, Ci to C 6 alkylthio, C 6 to Cio aryloxy, C 6 to do- Arylcarbonylamino stand.
• R 1 represents hydrogen, Ci to C 6 alkyl, C 5 to C 6 cycloalkyl, Ci to C 6 alkoxycarbonyl, aryl,
• X 1 represents NR 1 ,
• R 8S , R 88 represent hydrogen, R 86 , R 87 independently of one another represent hydrogen, methyl, Ci to C 4 alkoxy, chlorine, Ci to C 4 alkoxycarbonyl, Ci to C dialkylamino, Ci to C alkanoyloxy,
• R & 9 stands for O or NH
• R 91 represents hydrogen or Ci to C 4 alkoxycarbonyl
• R 101 represents Ci to C 6 alkoxy, Ci to C 6 alkanoyloxy, Ci to C 6 alkylthio, C 6 to Cio aryloxy.
• R 1 , R 85 - R 91 and X 1 have the meanings given above and
• the light-absorbing compounds of the formula (I) used are those with the formula (VI)
• X 1 represents NR 1 ,
• R 1 for hydrogen, Ci to C 6 alkyl, Ci to C 6 alkenyl, Ci to C 6 alkynyl, C to C cycloalkyl, C 7 to ds-aralkyl, Ci to C 6 Alkoxycarbonyl, aryl or
• Hetaryl where the hetaryl radical can contain up to 3 heteroatoms and the aryl or hetaryl radical can be substituted by up to 3 nonionic radicals,
• R 111 for hydrogen, methyl, bromine, amino, N-methylamino, dimethylamino,
• Ring A stands for a 5-9 membered partially unsaturated, aromatic or quasi-aromatic ring which can contain 1-4 heteroatoms or carbonyl groups and / or benzene or naphthane fused and / or substituted by nonionic radicals and X 6 represents cyano, d- to C 6 -alkoxycarbonyl, C 6 - to C 10 -aryloxycarbonyl or Cr to Cö-alkanoyloxycarbonyl.
• X 1 represents NR 1 ,
• R 1 is Ci to C 6 alkyl, d to C 6 alkenyl, d to C 6 alkynyl, C 4 to C 7 cycloalkyl, C 7 to C 1 aralkyl, aryl or hetaryl, the hetaryl radical can contain up to 3 heteroatoms and the aryl or hetaryl radical can contain up to
• R 111 represents hydrogen, methyl, bromine, methoxy, ethoxy,
• Ring A represents a 5-7-membered, partially unsaturated, aromatic or quasi-aromatic ring which can contain 1-4 heteroatoms or carbonyl groups and / or benzene- or naphthannellated and / or can be substituted by nonionic radicals and
• X 6 represents cyano, C ⁇ - to C 6 -alkoxycarbonyl, C 6 - to Cio-aryloxycarbonyl.
• X 1 represents NR 1 ,
• R 1 is C to C 6 alkyl, C r to C 6 alkenyl, C 5 to C 7 cycloalkyl, C 7 to C 5 aralkyl, aryl or hetaryl, the hetaryl radical having up to 3 heteroatoms may contain and the aryl or hetaryl radical may be substituted by up to 3 nonionic radicals,
• R u ' represents hydrogen
• R 112 represents cyano, Ci to C 6 alkoxycarbonyl or C 6 to Cio aryloxycarbonyl,
• Ring A stands for a 5-6-membered, partially unsaturated, aromatic or quasi-aromatic ring which may contain 1-4 heteroatoms or carbonyl groups and / or benzene or naphthane fused and / or substituted by nonionic radicals and
• X 6 represents cyano, Ci to C ö alkoxycarbonyl, C 6 to Cio-aryloxycarbonyl.
• mixtures of the compounds of the formula (I) can also be used to optimize the physical properties of the information layer.
• a write-once optical data carrier according to the invention which is written and read with the light of a blue laser, preference is given to those light-absorbing compounds whose absorption maximum ⁇ max is in the range from 350 to 470 nm and which are above the cyclization temperature T cyc in a ring-closed form have converted.
• Light- absorbing compounds with a cyclization temperature T cyc of at least 100 ° C. are preferred, particularly preferably greater than or equal to 140 ° C., in particular greater than or equal to 180 ° C.
• Preferred dyes are those in which the shift in the absorption maximum ⁇ max induced by the thermal cyclization is 25 nm or more, preferably> 35 nm, in particular> 45 nm. If there is a preferably hypsochromic shift, ⁇ max is negative. Absorption maximum in the sense of the invention is the local one
• the light-absorbing compounds preferably have a molar extinction coefficient ⁇ > 20,000 1 / mol cm, preferably
• the absorption spectra are measured, for example, in solution.
• the light-absorbing compounds described, in particular of the formula (I), guarantee a sufficiently high reflectivity (> 10%) of the optical data carrier in the blank state and a sufficiently high absorption for the thermal Degradation of the information layer in the case of selective lighting with focused light if the light wavelength is in the range from 360 to 460 nm.
• the contrast between written and unwritten points on the data carrier is realized by the change in reflectivity of the amplitude as well as the phase of the incident light by the optical properties of the information layer which have changed after thermal degradation.
• the light-absorbing compounds are preferably applied to the optical data carrier by spin coating. They can be mixed with one another or with other dyes with similar spectral properties.
• the information layer can contain additives such as binders, wetting agents, stabilizers, thinners and sensitizers and other constituents.
• the optical data storage device can carry further layers such as metal layers, dielectric layers and protective layers.
• Metal and dielectric layers and / or the protective layer serve among other things. to adjust the reflectivity and the heat balance.
• metals can be gold, silver, aluminum, etc. his.
• Dielectric layers are, for example, silicon dioxide and silicon nitride.
• Protective layers are, for example, photocurable lacquers, (pressure-sensitive) adhesive layers and protective films.
• Pressure-sensitive adhesive layers mainly consist of acrylic adhesives.
• the optical data carrier has, for example, the following layer structure (cf. FIG. 4): a transparent substrate (1), optionally a protective layer (2), an information layer (3), optionally a protective layer (4), optionally an adhesive layer (5), a cover layer (6).
• the structure of the optical data carrier can:
• a preferably transparent substrate (1) on the surface of which at least one information layer (3) which can be written on with light and which can be written on with light, preferably laser light, optionally one
• Protective layer (4) optionally an adhesive layer (5), and a transparent cover layer (6) are applied.
• a transparent substrate (1) on the surface of which a protective layer (2), at least one information layer (3) which can be written on with light, preferably laser light, optionally an adhesive layer (5), and a transparent cover layer (6) are applied.
• a transparent substrate (1) on the surface of which there is optionally a protective layer (2), at least one information layer (3) which can be written on with light, preferably laser light, optionally a protective layer (4), optionally an adhesive layer (5), and a transparent cover layer (6) are applied.
• a preferably transparent substrate (1) on the surface of which at least one information layer (3) which can be written on with light, preferably laser light, optionally an adhesive layer (5), and a transparent cover layer (6) are applied.
• the invention further relates to optical data carriers according to the invention described with blue light, in particular laser light.
• the absorption band disappears almost completely in the 450 nm range and leads to a change in the absorption properties, which can be used in the wavelength range from 400 to 500 nm for optical storage and reproduction of data, e.g. a laser beam with a suitable pulse duration and pulse energy heats the dye layer above 133 ° C.
• each absorption also produces a dispersion of the refractive index above that
• Wavelength This leads to low (short-wave flank) or higher (long-wave flank) refractive indices than 1.4-1.6, which is the usual range for colorless organic materials, especially on the flanks of the absorption bands.
• the refractive index of the dye at the beginning of the temperature cycle is 1.17 and at 515 nm it is 2.17 nm.
• the decolorized dye has a refractive index in the range from 1.4 to 1.6 in the visible spectrum , This change in the refractive index can also be used for optical storage and reproduction of data, e.g.
• a laser beam with a suitable pulse duration and pulse energy heats the dye layer above 133 ° C.
• Changes in the refractive index and / or the absorption change the reflection and / or transmission properties of thin films on a transparent substrate (glass or polymer) and can therefore be changed by a laser beam which is scanned over markings written with a pulsed and focused laser beam the reflected and / or transmitted amount of light are transformed.
• the relevant film thicknesses are preferably in the range from 10 nm to 2000 nm.
• Figure 2 and Figure 3 show an example of the change in transmission of the sample described above at 405 nm during the temperature cycle.
• Figure 2 shows the Transmission curve shown over the temperature and Figure 3 over time.
• the laser wavelength is preferably in the range from 360 nm to 600 nm, particularly preferably in the range from 380 nm to 550 nm.

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