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WO2009145787A1 - Support d'enregistrement optique de données - Google Patents

Support d'enregistrement optique de données Download PDF

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Publication number
WO2009145787A1
WO2009145787A1 PCT/US2008/065373 US2008065373W WO2009145787A1 WO 2009145787 A1 WO2009145787 A1 WO 2009145787A1 US 2008065373 W US2008065373 W US 2008065373W WO 2009145787 A1 WO2009145787 A1 WO 2009145787A1
Authority
WO
WIPO (PCT)
Prior art keywords
waveband
optical data
recording medium
data recording
medium
Prior art date
Application number
PCT/US2008/065373
Other languages
English (en)
Inventor
Makarand P. Gore
Charles R. Weirauch
Richard Lione
Jitka Brynjolffssen
Original Assignee
Hewlett-Packard Development Company, L.P.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hewlett-Packard Development Company, L.P. filed Critical Hewlett-Packard Development Company, L.P.
Priority to PCT/US2008/065373 priority Critical patent/WO2009145787A1/fr
Priority to TW098117979A priority patent/TW201007726A/zh
Publication of WO2009145787A1 publication Critical patent/WO2009145787A1/fr

Links

Classifications

    • 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
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24073—Tracks
    • G11B7/24079—Width or depth
    • 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
    • G11B7/2403—Layers; Shape, structure or physical properties thereof
    • G11B7/24035—Recording 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
    • G11B7/241—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
    • G11B7/26—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
    • G11B7/24—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

Definitions

  • optical data recording media Materials that produce color and/or contrast change upon stimulation with radiation are used in optical recording and imaging media and devices. Further, widespread adoption of and rapid advances in technologies relating to optical recording and imaging media have created a desire for greatly increased data storage capacity in such media. Thus, optical storage technology has evolved from the compact disc (CD) and laser disc (LD) to far denser data types such as digital versatile disc (DVD) and blue laser formats such as BLU-RAY and high-density DVD (HD-DVD).
  • CD compact disc
  • LD laser disc
  • DVD digital versatile disc
  • HD-DVD high-density DVD
  • BLU-RAY is a trademark of BLU-RAY, Inc., Essex, CT
  • BLU-RAY Disc is a trademark of Sony Kabushiki Kaisha Corp., Tokyo, Japan.
  • Figure 1 is a semi-schematic perspective view and block diagram illustrating an embodiment of an optical disc recording system
  • Figure 2 is a cutaway cross-sectional view of an embodiment of a recording medium shown in conjunction with a partial block diagram of some of the elements of the system represented in Fig. 1 ;
  • Figure 3 is a perspective view of another embodiment of a recording medium.
  • Embodiments of the optical recording/reading media disclosed herein are discs that are capable of being written to one time.
  • a wavelength from a first waveband is used to write data that is readable in a second waveband, which is at least 100 nm apart from the first/write waveband.
  • the dye system (including an absorber and a contrast agent) and the disc structure are selected such that the characteristics of the media are within desirable DVD specifications.
  • the discs may be configured to have a similar format to the DVD-R format or DVD+R format, where they are writable at one wavelength/waveband and readable at another wavelength/waveband. It is believed that the media disclosed herein are suitable for use with manufacturing on demand (MOD) applications.
  • MOD manufacturing on demand
  • BLU-RAY discs can currently be used to store 2 hours of high resolution video images or 13 hours of conventional video images.
  • a blue- violet laser having a wavelength between 380 nm and 420 nm, and particularly 405 nm is used as the light source for BLU-RAY discs.
  • Another technology using blue light (380 nm ⁇ 420 nm radiation) is HD-DVD and ultra density optical (UDO) discs.
  • wavelength generally refers to the stated value. However, when discussing the wavelength of a laser diode, the term wavelength includes the stated value ⁇ 5 nm.
  • the system disclosed herein may be defined, at least in part, by the wavebands.
  • a wavelength of the first defining waveband is used to write data and a wavelength of the second defining wavebands, which is at least 100 nm from the first waveband, is used to read data.
  • color may be used to refer to the wavebands for the media and system. For example, media disclosed herein that use the 405 nm 'blue' band to write on the media, and the 650 nm 'red' band to read the media may be referred to as "Write Blue-Read Red".
  • contrast agent is defined as any material that, in conjunction with an absorber, will produce contrast in the desired read band due to physical or chemical changes.
  • the contrast agent may be a leuco dye or a combination of a leuco dye and a developer/developer precursor.
  • Leuco dye refers to a color- or contrast-forming substance that is colorless or exhibits one contrast in a non-activated state and that produces or changes contrast in an activated state.
  • developer and “activator” describe a substance that reacts with the dye and causes the dye to alter its chemical structure and change or acquire color.
  • the term "light” as used herein includes electromagnetic radiation of any wavelength or band and from any source.
  • the recording medium 100 (shown in Figs. 1 through 3) disclosed herein may be used to record, with a first waveband, optical data or visual images, which are then readable when exposed to light beams within a second waveband.
  • the medium 100 is generally either reflective or transmissive. In one embodiment, the medium 100 is reflective and will be read accordingly using a reflected beam.
  • the system shown in Fig. 1 used to write and/or read data includes optical components 148, a light source 150 that produces an incident energy beam 152, and a reflected beam 154 which is detected by a pickup or optical sensor 157.
  • the system may include a lens or optical system 600 to detect the transmitted beam 156 by a top detector 158 (a non-limiting example of which is a photo detector), which is also analyzed for the presence of signal agents.
  • a top detector 158 a non-limiting example of which is a photo detector
  • Fig. 2 shows an abbreviated block diagram of the read/write system 170 illustrating some of the same optical components shown in Fig. 1.
  • Fig. 1 also depicts a cylindrical lens 159 which is generally used for astigmatic focusing.
  • the reflected beam 154 is being focused (or converging) to a different point as the disc location moves closer or farther in a vertical direction from the optics.
  • the cylindrical lens 159 further causes the beam 154 to converge faster along one axis than the other axis. This causes the profile of the light intensity on the photodetector 157 to change shape becoming more or less elliptical as the surface of the disc 100 moves closer or farther vertically with respect to the optics.
  • a focus signal may be generated by having the photodetector 157 split into four quadrants, and comparing the four quadrants allows the laser beam 152 to remain focused on the disc 100.
  • the system 170 includes a light source 150 that is able to emit the write wavelengths (e.g., those wavelengths within the 405 nm waveband) when desirable, and the read wavelengths (e.g., those wavelengths within the 650 nm waveband) when desirable.
  • the system 170 includes a light source 150 that emits write wavelengths and a separate system 170 that includes a light source 150 that emits read wavelengths.
  • the separate write and read systems 170 may be particularly suitable for the media 100 disclosed herein.
  • Fig. 1 also illustrates a drive motor 162 and a controller 164 for controlling the rotation of the optical disc/imaging medium 100.
  • Mark(s) (shown as 242 in Fig. 2) may be read/detected by an optical sensor (e.g., optical pickup 157).
  • the sensor e.g., optical pickup 157) is positioned so as to detect at least one readable pattern of the optically detectable mark(s) 242 on the medium 100.
  • the sensor reads the marks 242 as the medium 100 moves in relation to the sensor.
  • a laser beam of the sensor is focused on the marked surface and detects changes in the reflected beam.
  • the sensor converts the signal from the optically detected marks 242 and converts them to one or more electrical signals which may be sent to a processor 166.
  • the processor 166 and an analyzer 168 may be implemented together or in the alternative for processing the return beam 154 with a signal 165 from the optical sensor 157, such as a photodetector, to the processor 166.
  • processor 166 and/or analyzer 168 process a transmitted beam 156 from a signal 163 transmitted from the optical detector 158.
  • a display monitor 114 is also provided for displaying the results (generally in the form of data) of the processing.
  • the system may also include a computer data base (not shown) which collects and stores the processed/analyzed data for subsequent retrieval.
  • Signals 165 from the optical sensor 157 may be used to detect recorded marks 242 on the medium 100, or various tracking signals, such as the push pull signal.
  • the push-pull signal is derived from the difference between the electrical signals from the two sides of an optical sensor split into at least two equal parts tangentially to the track direction.
  • the land and groove G (shown in Fig. 2) structure on the medium 100 causes diffraction of the reflected light.
  • the diffracted light has different amounts of phase interference with respect to the main reflected light between the two sides as the focused light moves radially across the tracks.
  • the push-pull signal is used to maintain radial tracking and can also be used to detect and read minor variations in the groove G (or land) that may contain various information such as format data or velocity information.
  • Embodiments of the dye medium 100 include a substrate 220 and a dye coating 230 established on a surface 222 thereof.
  • a reflective layer 231 is established directly adjacent the substrate 220
  • the dye coating 230 is established on the reflective layer 231
  • a cover or protective layer 234 is established between the dye coating 230 and the optical beam 110.
  • Such protective layers 234 are generally known, and enable writing to the coating 230 and reading of the mark(s) 242 while protecting the coating 230 from scratching, dirt, etc. It is to be understood that other embodiments of the medium 100 do not include a protective layer 234.
  • the reflective layer 231 may not be present, and in such embodiments, the dye provides different levels of reflectivity between mark(s) 242 and unrecorded areas of the dye coating 230 for a reflective disc 100.
  • the reflective layer 231 may not be present and the substrate 220 may be optically transparent to allow detection of the mark(s) 242 on the opposite side of the disc 100 from the entrance beam 110.
  • the reflective layer 231 may be made up of materials having a high reflectance to laser light, such as, for example, Mg, Se, 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, Ca, In, Si, Ge, Te, Pb, Po, Sn, Si, and/or Nd.
  • the reflective layer 231 is formed of Ag, Au or Al.
  • each of the reflector materials may be used alone, as an admixture, or as an alloy.
  • additional layer(s) 236, such as buffer layers, may be established between the coating 230 and the protective layer 234.
  • a buffer layer (not shown) may exist between the coating 230 and the reflective layer 231.
  • suitable buffer layers include dielectric materials that enable the desirable wavelength(s) to be transmitted therethrough.
  • the layers 230, 231 , 234 and 236 may be established via any desirable technique, including, but not limited to rolling, spin-coating, spraying, lithography, sputtering, evaporation, or screen printing.
  • the characteristics of the medium 100 and the dyes making up the dye coating 230 are selected such that the resulting medium 100 is configured to be once writable, and after recording, provides similar signal levels as read-only media allowing drives to recognize the medium 100 as a readonly memory (ROM) disc.
  • the composition of the dye coating 230 may be tuned to allow a 405 nm waveband (blue) laser to generate optical contrast at the 650 nm waveband in dyes that are often used for recording with a 650 nm waveband (red) laser. Blue laser recording may improve 114/114H modulation and stability of the recorded data (i.e., marks 242) without deletehously affecting push pull, reflectivity, and other medium 100 properties.
  • the combination of the enhanced modulation and tuned structural characteristics is believed to render the medium 100 such that data is recordable one time at the 405 nm waveband and is readable in a standard DVD player (as if the mark 242 had been recorded using a standard red laser). It is further believed that the push pull signals at the read waveband (e.g., 650 nm waveband) improve playback in legacy DVD players and recorders.
  • tuned structural characteristics e.g., reflectivity, groove depth D
  • reflectivity and push pull may be controlled, for example, by adjusting the reflectivity of one or more layers 230, 234, 236 in the medium 100 (e.g., via reflective layer thickness, reflective material used, concentration of reflective material, etc.), adjusting the depth D of the groove(s) G in the substrate 220 (shown in Fig. 2), adjusting the width of the groove(s) G, adjusting the groove G wall angle, adjusting the dye coating 230 thickness, adjusting the amount of dye coating 230 filling the respective groove(s) G, adjusting the concentrations of the dyes within the coating 230, and/or combinations thereof.
  • the substrate 220 for the medium 100 may be any substrate upon which it is desirable to make a mark 242, such as, for example, the polymeric substrate used in conventional CD-R/RW/ROM, DVD ⁇ R/RW/ROM, HD-DVD or BLU-RAY disc.
  • Substrate 220 may be paper (e.g., labels, tickets, receipts, or stationery), an overhead transparency, or another surface upon which it is desirable to record marks 242.
  • the substrate 220 includes one or more grooves G formed therein. In an embodiment, multiple concentric grooves G are formed in the substrate 220. In another embodiment, a single spiral groove G extending from an inner diameter to an outer diameter is formed in the substrate 220. In still another embodiment, a combination of concentric and spiral grooves G are formed in the substrate 220 (e.g., multiple separate spiral grooves G are formed in the substrate 220).
  • the depth D and/or width of the groove(s) G may be altered to achieve a desirable push pull signal after recording or at the read wavelength/waveband.
  • a desirable push pull signal is ⁇ 0.3
  • a desirable push pull signal is ⁇ 0.4. It is to be understood that such push pull signal may be achieved when (in combination with the other structural characteristics disclosed herein) the groove depth D is less than 170 nm. In another non-limiting example, the groove depth D ranges from about 130 nm to about 150 nm.
  • the depth D of the groove(s) G may range from about 110 nm to about 145 nm. As previously mentioned, it is also believed that narrow groove geometries may aid in achieving desirable push pull after write levels. As non- limiting examples, the groove G width may be ⁇ 350 nm, or may range from about 200 nm to about 300 nm.
  • the combination of the dye composition, groove G depth D and/or groove G width enables the optimization of the push pull and modulation values to any desirable level.
  • different groove G geometries e.g., depth D and/or width
  • dye combinations may be employed.
  • the dye coating 230 includes a color-forming or contrast agent 240 and an absorber 239 suspended, dissolved, or finely dispersed in a matrix or binder (e.g., a polymeric matrix including, for example, polyacrylates, polystyrenes, polyalkenes, or polycarbonates).
  • a matrix or binder e.g., a polymeric matrix including, for example, polyacrylates, polystyrenes, polyalkenes, or polycarbonates.
  • the contrast agent 240 and the absorber 239 are completely soluble in the coating matrix or binder.
  • the dye coating 230 also includes a fixing agent (not shown).
  • the matrix material may be any composition suitable for dissolving and/or dispersing the absorber 239 and the contrast agent 240.
  • Acceptable matrix materials include, but are not limited to, UV-curable matrices such as acrylate derivatives, oligomers and monomers, with or without a photo package.
  • a photo package may include a light-absorbing species which initiates reactions for curing the matrix, such as, for example, benzophenone derivatives.
  • Other examples of photoinitiators for free radical polymerization monomers and pre-polymers include, but are not limited to, thioxanethone derivatives, anthraquinone derivatives, acetophenones and benzoin ether types. It may be desirable to choose a matrix that can be cured by a form of radiation other than the type of radiation that is used for writing.
  • Matrices based on cationic polymerization resins may require photo- initiators based on aromatic diazonium salts, aromatic halonium salts, aromatic sulfonium salts and metallocene compounds.
  • An example of an acceptable matrix includes Nor-Cote CLCDG-1250A or Nor-Cote CDGOOO (mixtures of UV curable acrylate monomers and oligomers), which contains a photoinitiator (hydroxy ketone) and organic solvent acrylates (e.g., methyl methacrylate, hexyl methacrylate, beta-phenoxy ethyl acrylate, and hexamethylene acrylate).
  • acrylated polyester oligomers such as CN292, CN293, CN294, SR351 (thmethylolpropane tri acrylate), SR395 (isodecyl acrylate), and SR256 (2(2-ethoxyethoxy) ethyl acrylate) available from Sartomer Co.
  • the photochemical and/or photothermal mechanisms that cause the developer precursors to become developers are much slower when the solid matrix is below its glass transition temperature.
  • the photochemical reactions in solids have an added energy barrier to heat the matrix above its glass transition temperature (T 9 ).
  • T 9 typically depends on the polymer composition of the matrix, and may be selected, if desired, by selecting the polymer that is used for the matrix. In some embodiments, T 9 will range from about 120 0 C to about 300 0 C.
  • the dye coating 230 may have a thickness equal to or less than 100 nm.
  • spin coating is one suitable application technique for establishing the coating 230 on the substrate 220.
  • the dye coating 230 should be, inter alia, free from particles that would prevent formation of such a thickness, i.e., free from particles having a dimension greater than 100 nm.
  • the components of the coating 230 may be in complete solution, thereby producing molecular level film aggregates.
  • any particles present in the coating 230 would have an average size less than half of the wavelength of the light to which the coating is transparent. While a coating 230 in which all particles are smaller than 150 nm would serve this purpose, it may be more desirable to utilize a coating 230 in which the marking components are dissolved, as opposed to one in which they are present as particles. Still further, as target data densities increase, the dot size, or mark size, that can be used for data recording decreases. Some currently available technologies require an average dot size of 150 nm or less. For all of these reasons, the dye coating 230 is therefore desirably entirely free of particles that are larger than half the wavelength of the write radiation.
  • marking energy 110 is directed in a desired manner at the medium 100.
  • the form of the energy may vary depending upon the equipment available, ambient conditions, and desired result.
  • a non- limiting example of energy that may be used include, but are not limited to, blue light (380 nm - 420 nm radiation).
  • medium 100 is illuminated with light having the desired write wavelength (or within the write waveband) at the location where it is desired to form a mark 242.
  • the absorber 239 in the marking layer 230 absorbs the energy, causing some physical and/or chemical change in the contrast agent 240, resulting in the mark 242 that is optically readable with light of the second wavelength (or within the read waveband). It is to be understood that the resulting mark 242 can be detected by an optical sensor emitting the read wavelength or waveband.
  • Non-limiting examples of absorbers 239 with absorption at or near 405 nm include curcumin; crocetin; porphyrin and derivatives thereof (e.g., etioporphyrin 1 (CAS 448-71-5), octaethyl porphyrin (CAS 2683-82-1 ), and deuteroporphyrin IX 2,4 bis ethylene glycol (D630-9), available from Frontier Scientific); azo dyes (e.g., Mordant Orange (CAS 2243-76- 7), Methyl Yellow (CAS 60-11 -7), 4-phenylazoaniline (CAS 60-09-3), and Alcian Yellow (CAS 61968-76-1 )); C.I.
  • the desired developer is provided in the form of a precursor that can be photochemically or photothermally modified to become the desired developer.
  • the need to physically separate the developer from the dye is eliminated.
  • both the dye and the developer precursor may be dissolved in the matrix.
  • absorbers that have modifying groups as described in US Patent No. 6,015,896 and US Patent No. 6,025,486 (both of which are incorporated herein by reference) are suitable for use as contrast agents 240 in the embodiments disclosed herein.
  • Such modifying groups may be present on the ring, the atom or the ion at the center of a naphthalocyanine or a phthalocyanine complex. Examples of some suitable naphthalocyanine and phthalocyanine dyes are shown below:
  • Suitable contrast agents 240 include the following: 1 ) those described in U.S. Patent No. 5,079,135, Japanese Patent 2,910,042 B2,
  • the dye coating 230 may include a combination of the leuco dye Noveon Specialty Cyan 39 as the contrast agent 240 and C.I. Solvent Yellow 93 as the absorber 239.
  • Such a dye coating 230 may also include suitable developers, such as zinc salicylate, and PERGAFAST® 201 (commercially available from Ciba).
  • suitable developers such as zinc salicylate, and PERGAFAST® 201 (commercially available from Ciba).
  • another non-limiting example of the dye coating 230 includes C.I. Solvent Yellow 93 as the absorber 239 and IRGAPHOR® 1699 as the contrast agent 240.
  • radiation sources e.g., a laser or LED
  • the medium 100 is again positioned such that light (having a wavelength that ranges from 620 nm to 680 nm) emitted by a laser 150 (which is generally different from the laser 150 previously described for writing) is incident on the marked surface.
  • the laser 150 is operated such that the light incident at the surface does not transfer sufficient energy to the surface to cause a mark 242. Instead, the incident light is reflected from the marked surface to a greater or lesser degree, depending on the absence or presence of a mark 242.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

L'invention porte sur un support d'enregistrement optique de données (100) qui comprend un substrat (220) et un revêtement de colorant (230) établi sur le substrat (220). Le revêtement de colorant (230) comprend un absorbeur (239) ayant un maximum d'absorption lumineuse à une première bande d'ondes, et un agent de contraste (240) ayant un maximum d'absorption lumineuse à une seconde bande d'ondes qui est espacée par au moins 100 nm de la première bande d'ondes. Le support (100) est configuré pour présenter une réflectivité supérieure ou égale à 45 % et un signal symétrique (PPa) à la seconde bande d'ondes égal ou inférieur à 0,4.
PCT/US2008/065373 2008-05-30 2008-05-30 Support d'enregistrement optique de données WO2009145787A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/US2008/065373 WO2009145787A1 (fr) 2008-05-30 2008-05-30 Support d'enregistrement optique de données
TW098117979A TW201007726A (en) 2008-05-30 2009-06-01 Optical data recording media

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2008/065373 WO2009145787A1 (fr) 2008-05-30 2008-05-30 Support d'enregistrement optique de données

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WO2009145787A1 true WO2009145787A1 (fr) 2009-12-03

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5445853A (en) * 1992-01-09 1995-08-29 Sony Corporation Optical data storage media
US20050174916A1 (en) * 2002-05-13 2005-08-11 Yutaka Yamanaka Optical disc and method for reproducing the same
US20080050672A1 (en) * 2006-08-24 2008-02-28 Gore Makarand P Light activated contrast systems using masked developers for optical data recording

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5445853A (en) * 1992-01-09 1995-08-29 Sony Corporation Optical data storage media
US20050174916A1 (en) * 2002-05-13 2005-08-11 Yutaka Yamanaka Optical disc and method for reproducing the same
US20080050672A1 (en) * 2006-08-24 2008-02-28 Gore Makarand P Light activated contrast systems using masked developers for optical data recording

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