Classifications

• • 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
• • 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
  • C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
  • C09B67/0097—Dye preparations of special physical nature; Tablets, films, extrusion, microcapsules, sheets, pads, bags with 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
  • G11B7/004—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
  • G11B7/007—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
  • G11B7/00718—Groove and land recording, i.e. user data recorded both in the grooves and on the lands
• • 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
  • 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
  • G11B7/26—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
• • 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
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/21—Circular sheet or circular blank

Definitions

• Optical data carrier containing a phthalocyanine dye as a light-absorbing compound in the information layer
• the invention relates to a write-once optical data carrier which contains at least one phthalocyanine dye in the information layer as a light-absorbing compound, and to a process for its preparation and the application of the above-mentioned dyes to a polymer substrate, in particular polycarbonate Spin coating, vapor deposition or sputtering.
• the write-once optical data carriers using special light-absorbing substances or their mixtures 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.
• the next generation of optical data storage media - the DVD - was recently launched.
• the storage density can be increased by using shorter-wave laser radiation (635 to 660 nm) and a higher numerical aperture NA.
• the write-once format is the DVD-R.
• the patent literature describes dye-based writable optical data memories which are equally suitable for CD-R and DVD-R systems (JP-A 11 043 481 and JP-A 10 181 206).
• JP-A 11 043 481 and JP-A 10 181 206 For a high reflectivity and a high modulation level of the readout signal, as well as for a sufficient sensitivity when writing, use is made of the fact that the IR wavelength 780 nm of the CD-R lies at the foot of the long-wave flank of the absorption peak of the dye, the red one Wavelength 635 nm or 650 nm of the DVD-R lies at the foot of the short-wave flank of the absorption peak of the dye (cf. EP-A 519 395 and WO-A 00/09522).
• the recordable information layer made of light-absorbing organic substances must be as amorphous as possible
• 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 light-absorbing information layer by sputtering or vapor deposition, are diffused by diffusion Form interfaces and thus adversely affect 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 accordingly to provide suitable connections 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 data storage
• Phthalocyanines show an intense absorption in the for the
• Laser important wave range 360 - 460 nm the so-called B or Soret band.
• the present invention therefore relates to an optical data carrier, comprising a preferably transparent substrate, possibly already coated with one or more reflection layers, on the surface of which an information layer which can be written on with light, optionally one or more reflection layers and optionally a protective layer or a further substrate or Cover layer are applied, which with blue light, preferably laser light, particularly preferably light with a wavelength of 360-460 nm, in particular 380-420 nm, very particularly preferably 390-410 nm, or with infrared light, preferably laser light, particularly preferably light with a wavelength from 760 - 830 nm, can be described and read, the information layer containing a light-absorbing compound and optionally a binder, characterized in that at least one phthalocyanine of the formula (I) is used as the light-absorbing compound
• Me stands for a doubly axially substituted metal atom from the group Si, Ge and Sn,
• Pc stands for an unsubstituted phthalocyanine
• Xi and X 2 independently of one another represent halogen, in particular fluorine, chlorine or bromine.
• phthalocyamines of the formula (I) are used, in which X 1 and X 2 each represent chlorine.
• the phthalocyanines used according to the invention are, for example, from Carl W. Dirk et. al. J. Am. Chem. Soc. 1983, 105, 1539 - 1550 are known as precursors for the production of electrically conductive polymers and can be produced as described there.
• the light absorbing compounds are thermally changeable.
• the thermal change preferably takes place at a temperature of ⁇ 600 ° C.
• Such a change can be, for example, a decomposition or chemical change in the chromophoric center of the light-absorbing compound.
• the light-absorbing substances described guarantee a sufficiently high level
• Reflectivity of the optical data carrier in the blank state as well as a sufficiently high absorption for the thermal degradation of the information layer in the case of selective illumination with focused blue light, in particular laser light, preferably with a light wavelength in the range from 360 to 460 nm.
• the contrast between the described and the blank positions on the data carrier is determined by the change in reflectivity of the amplitude as well as the phase of the falling light realized by the optical properties of the information layer changed after the thermal degradation.
• optical data carrier can preferably be written and read with laser light with a wavelength of 360-460 nm.
• the optical data carrier can also be written and read with infrared light, in particular laser light with a wavelength of 760-830 nm, in which case the groove distance and geometry are preferably adapted to the wavelength and numerical aperture.
• the invention further relates to the use of the phthalocyanines of the formula (I) as light-absorbing compounds in the information layer of optical storage media.
• the invention also relates to the use of the phthalocyanines of the formula (I) for the production of optical storage media.
• the phthalocyanines are preferably used in the information layer as light-absorbing compounds.
• the phthalocyanines used with particular preference in these uses have a content of more than 90% by weight, in particular more than 95% by weight, particularly preferably more than 98% by weight, of the phthalocyanine of the formula (I), based on the material used ,
• a phthalocyanine of the formula (Ia) with the following is very particularly preferred
• a phthalocyanine of the formula (Ib) with the following reflectivity maxima at 2 ⁇ (theta), measured in degrees, is likewise particularly preferably used in the X-ray diffractogram: 10.6, 11.4, 11.8, 12.3, 13.9, 14.6, 15.3, 15.5, 17.4, 18.4, 19.7, 20.5 , 22.3, 22.7, 23.0,
• a phthalocyanine of the formula (Ic) with the following reflectivity maxima at 2 ⁇ (theta), measured in degrees in the X-ray diffractogram, is likewise particularly preferably used:
• the invention further relates to a particulate solid preparation of a compound of formula (I), characterized in that the particles have a medium
• Particle size from 0.5 microns to 10 mm.
• particulate solid preparations those are preferred which have an average particle size of 0.5 to 20 ⁇ m, in particular 1 to 10 ⁇ m - hereinafter referred to as finely divided powder.
• finely divided powder Such fine-grained
• Powders can be produced, for example, by grinding.
• particulate solid preparations with an average particle size of 50 to 300 ⁇ m - hereinafter referred to as fine crystalline form.
• Further preferred particulate solid preparations are those with an average particle size of 50 ⁇ m to 10 mm, preferably 100 ⁇ m to 800 ⁇ m, which form a particulate shaped body as agglomerates or conglomerates of primary particles.
• Such moldings can have the shape of drops, raspberries, scales or sticks, for example - hereinafter referred to as granules.
• the particle size of the finely crystalline form can be set, for example, by means of the synthesis parameters.
• rapid heating for example in the range from 30 to 60 min, of the mixture of the components
• a coarse particle shape is preferably formed by, for example, slow heating, for example in the range from 65 to 250 min, of the mixture of the components to the reaction temperature, for example 160 to 220 ° C.
• the particulate solid preparations according to the invention preferably contain 80-100% by weight, preferably 95-100% phthalocyanine, 0.1-1.0% by weight, preferably 0.1-0.5% by weight, residual moisture, 0-10% by weight. %, inorganic salts, 0 '- 10 wt.% o, preferably 0 - 5 wt.%>, further additives such as, for example
• Dispersing agents, surfactants and / or wetting agents the percentages being based in each case on the preparation and, the sum of the proportions given being 100%.
• the solid preparations according to the invention are preferably low-dust, free-flowing and are notable for good storage stability.
• the granules can be produced in various ways, for example by spray drying granulation, fluidized bed spray granulation, fluidized bed build-up granulation or powder-fluidized bed agglomeration.
• Granulation by spray drying is preferred, with both rotary disks and single-substance or two-substance nozzles being suitable as the spray element.
• the inlet and outlet temperatures for spray drying depend on the desired residual moisture, safety measures and economic considerations.
• the inlet temperature is preferably 120-200 ° C, in particular 140-180 ° C, and the outlet temperature preferably 40-80 ° C.
• the procedure is generally such that the dye filter cake is mixed intensively, if appropriate with auxiliaries and additives, in a stirred kettle.
• the crystals of the suspension are preferably ground in a mill, e.g. a bead mill, so that a finely divided, sprayable suspension is obtained.
• the dye suspension is an aqueous suspension.
• the granulation takes place during spray drying.
• the invention further relates to solid moldings such as tablets, rods, etc. containing a phthalocyanine of the formula (I), preferably in an amount of more than 90% by weight, in particular more than 95% by weight, preferably more than 98% by weight. %, based on the molded body.
• Other ingredients of the solid moldings can be binders.
• the sums of phthalocyanine preferably complement each other Formula (I) and binder to more than 95 wt .-%, preferably more than 99 wt .-%.
• Such moldings can, for example, by pressing the phthalocyanine of the formula (I) optionally in the presence of binders at a pressure of 5 to
• 50 bar preferably 10 to 20 bar.
• the invention also relates to dispersions, preferably aqueous dispersions, containing a metal complex of the formula (I), preferably in an amount of 10 to 90% by weight, based on the dispersion.
• suitable dispersants are: polymeric dispersants based on acrylate, urethanes or long-chain polyoxyethylene compounds.
• Suitable products are, for example: Solsperse 32000 or Solsperse 38000 from Avecia.
• the invention further relates to a method for coating substrates with the phthalocyanines of the formula (I). It is preferably carried out by spin coating, sputtering or vacuum evaporation.
• the phthalocyanines of the formulas (Ia), (Ib), (Ic) and (Id) can in particular be applied by vacuum evaporation or sputtering, in particular vacuum evaporation.
• phthalocyanines of the formula (I) i.e. H. finely divided powders, finely crystalline forms or granules, particulate solid preparations, solid moldings and dispersions.
• the latter serve in particular to apply the phthalocyanines in fine particles to a surface from which they can then be applied to the substrate by sputtering or vacuum evaporation.
• the phthalocyanines 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 invention further relates to an apparatus for evaporating light-absorbing compounds onto a substrate for the production of optical storage media, which is characterized in that the dye can be evaporated by heating at a low background pressure and deposited on the substrate.
• the background print is below 10 " Pa, preferably below 10 " Pa, particularly preferably below 10 "4 Pa.
• the dye is preferably heated by resistive heating or by microwave absorption.
• the invention relates in particular to an optical data carrier as described above, the light-absorbing compound of the formula (I), optionally together with the additives mentioned above, forming an information layer which is optically amorphous.
• Amorphous is understood to mean that no crystallites can be observed by light microscopy and that no X-rays can be used to observe Bragg reflections but only an amorphous halo.
• the optical data storage device can carry further layers such as metal layers, dielectric layers and protective layers.
• Metals and dielectric layers serve u. a. to adjust the reflectivity and the heat balance. Depending on the laser wavelength, metals can be gold, silver, aluminum, alloys, etc. his.
• Dielectric layers are, for example, silicon dioxide and silicon nitride.
• Protective layers are, for example, photocurable lacquers, adhesive layers and protective films.
• the adhesive layers can be pressure sensitive.
• Pressure-sensitive adhesive layers mainly consist of acrylic adhesives.
• the optical data carrier has, for example, the following layer structure (cf.
• 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 preferably:
• a 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 a 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 preferably transparent substrate (1) on the surface of which there is optionally a protective layer (2), at least one information layer (3) that can be written on with light, preferably laser light, and optionally one
• 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 that can be written on with light, preferably laser light tion layer (3), optionally an adhesive layer (5), and a transparent cover layer (6) are applied.
• the optical data carrier has, for example, the following layer structure (cf. FIG. 2): a preferably transparent substrate (11), an information layer
• the optical data carrier has, for example, the following layer structure (cf. FIG. 3): a preferably transparent substrate (21), an information layer
• the structure of the optical data carrier can be:
• Photocurable lacquers are particularly preferred as separating layers.
• the invention further relates to optical data carriers according to the invention described with blue light, in particular laser light, particularly preferably laser light with a wavelength of 360-460 nm.
• the dye dichloro-silicon-phthalocyanine (SiCl 2 Pc) was evaporated in a high vacuum (pressure p «2» 10 "5 mbar) from a resistively heated molybdenum boat at a rate of approx. 5 Als onto a pregrooved polycarbonate substrate
• the pregrooved polycarbonate substrate was produced as a disk by means of injection molding.
• the diameter of the disk was 120 mm and its thickness was 0.6 mm.
• the groove structure embossed in the injection molding process had a track spacing of approximately ⁇ m, the groove The depth and groove half-width were about 150 nm and about 260 nm.
• the disk with the dye layer as the information carrier was evaporated with 100 nm Ag.
• the light reflected from the disk was coupled out of the beam path with the aid of the polarization-sensitive beam splitter mentioned above and through an astigmatic lens focused on a four-quadrant detector.
• the write power was applied as a pulse sequence, the disk being alternately irradiated for 1 ⁇ s with the above-mentioned write power P w and for 4 ⁇ s with the read power P ⁇ - 0.44 mW.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Optical Record Carriers And Manufacture Thereof (AREA)
• Thermal Transfer Or Thermal Recording In General (AREA)

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• 2002
  • 2002-08-16 US US10/222,609 patent/US6896945B2/en not_active Expired - Fee Related
  • 2002-08-19 CN CNA028163036A patent/CN1545702A/zh active Pending
  • 2002-08-19 WO PCT/EP2002/009240 patent/WO2003019548A1/de not_active Ceased
  • 2002-08-19 JP JP2003522922A patent/JP2005500923A/ja active Pending
  • 2002-08-19 EP EP02758471A patent/EP1421582A1/de not_active Withdrawn
  • 2002-08-20 TW TW091118734A patent/TWI256635B/zh not_active IP Right Cessation

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