Abstract: An optical information memory medium, including, in the stated order a substrate, an optical information memory layer which is capable of memorizing information therein, and a reversible display recording layer which is capable of rewritably recording therein, in a visibly recognizable form, at least part of an information corresponding to the information memorized in the optical information memory layer, and a display recording method using the optical information memory medium are disclosed.

Abstract: The invention relates to a crosslinked resin and to its application in the manufacture of ceramic or glass patterns at the surface of a substrate.

Abstract: A method for processing and laser ablation marking an imagewise exposed motion picture photographic film element which comprises a support having on a front side thereof one or more image-forming units comprising at least one light-sensitive silver halide emulsion layer is described, comprising processing the film to provide a developed photographic image with at least 100 mg/m2 of retained silver halide, and subsequently laser ablation marking the film to selectively ablate portions of the image forming units from the support.

Abstract: The present invention provides organic dye compounds which exert excellent recording characteristics in high-density optical recording media, and uses thereof. The present invention solves the objects of the present invention by providing non-symmetric trimethine cyanine dyes having a specific structure and properties, light absorbents and optical recording media comprising the cyanine dyes, and a process for preparing the cyanine dye comprising a step of reacting either 3,3-dimethyl-5-nitroindolium compounds or 3,3-dimethyl-5-sulfonamideindolium compounds, which have a reactive methyl group or an appropriate leaving group, with 3,3-dimethylbezoindolium compounds, which have a reactive methyl group or an appropriate leaving group.

Abstract: The invention provides an optical recording medium preventing deterioration of an organic dye, having improved durability and being highly reliable, as well as a process for producing the same. The recording layer (3) including an organic dye as the main component, and the reflective layer (4) comprising a metal selected from Cu, Ag and Au or an alloy containing at least one of these metals, are formed in this order on substrate (2). An ultraviolet-curable material is laminated on the reflective layer (4) and cured by irradiation with UV rays at 200 to 1000 mJ/cm2 in such a manner that a cure shrinkage factor is not more than 10% by volume to form the protective layer (5) so that the organic acid content in the resulting ultraviolet-cured resin is not more than 10 ppm by weight, whereby the optical disk (1) is obtained. The dye is preferably a cyanine type dye, and the reflective layer is preferably Cu, Ag or an alloy containing at least one of these metals.

Abstract: The present invention relates to compositions useful for optically recording or storing data by stimulating a composition having a refraction modulating composition, where a stimulated region of the composition represents one kind of data and a non-stimulated region of the composition represents another kind of data. The present invention also relates to methods of optically recording data utilizing the compositions of the present invention, as well as to optical data storage devices and optical data storage elements which utilize the optical data storage compositions of the invention.

Abstract: An organic write-once optical recording medium includes a surface plasmon super-resolution layer. The surface plasmon super-resolution layer is a three-layer structure including a first dielectric layer, a second dielectric layer, and a metal layer sandwiched between said first dielectric layer and said second dielectric layer. The metal layer with a certain thickness performs the surface plasmon effect when a laser beam with a suitable wavelength irradiates thereon. By the design and arrangement of the surface plasmon super-resolution layer, the small size of information-carrying pits and the recording marks in the range of around 100 nm is accessible. As a result, the super-resolution without the limit of the optical diffraction is achieved.

Abstract: A novel optical recording medium having at least a recording layer and a reflective layer on a substrate is herein disclosed, wherein at least one dipyrromethene metal chelate compound represented by formula (1) is contained in the recording layer: wherein R1 and R9 are each independently an alkenyl group, an aryl group or a heteroaryl group; R2 to R8 are each independently a hydrogen atom, a halogen atom, or a substituted or unsubstituted alkyl, alkoxy, alkenyl, acyl, alkoxycarbonyl, aralkyl, aryl or heteroaryl group having 20 or less carbon atoms; and M is a transition metal.

Abstract: An organic or organoelement, linear or branched, monomeric or polymeric composition of matter having a Raman-active component in the form of particles. The particles having a maximum dimension of 50 &mgr;m. The Raman-active compound is applied to a substrate. When the Raman-active compound is exposed to a laser light wavelength which is batochromically well beyond a spectral region of maximum absorbance of said Raman-active compound, Raman scattering can be detected.

Abstract: An inorganic write-once optical recording medium includes a surface plasmon super-resolution layer. The surface plasmon super-resolution layer is a three-layer structure including a first dielectric layer, a second dielectric layer, and a metal layer sandwiched between said first dielectric layer and said second dielectric layer. The metal layer with a certain thickness performs the surface plasmon effect when a laser beam with a suitable wavelength irradiates thereon. By the design and arrangement of the surface plasmon super-resolution layer, the small size of information-carrying pits and the recording marks in the range of around 100 nm is accessible. As a result, the super-resolution without the limit of the optical diffraction is achieved.

Abstract: An image recording medium is disclosed which comprising: an acid generating agent capable of generating an acid by the action of heat or an acid, which is represented by the following formula (1); and a compound of causing variation in the absorption region of from 360 to 900 nm by the intramolecular or intermolecular reaction triggered by the action of an acid: W1OP  (1) wherein W1 represents a residue of an acid represented by W1OH, and P represents an acid-sensitive substituent capable of splitting off at a temperature of 150° C. or less due to catalysis by W1OH.

Abstract: Composition and use of polymers in appropriate solvent(s) with or without addition of selected dye combinations are proposed for developing a thin-layer coating on the transparent layer of optical storage media such as audio and video CDs, laser discs (LD) and DVDs for improvement of the sound and/or video quality during either recording and/or playback of the encoded digital information. The invention can also be incorporated in manufacture of recordable (CD-R) and re-writeable CD (CD-RW) media. In that case, the proposed composition is applied on the polycarbonate transparent surface of optical storage media at the final stages of recordable media manufacturing.

Abstract: An optical recording medium having a structure including that a recording layer containing organic coloring matter and a reflecting layer that are sequentially formed on a light-transmissive substrate thereof so that an information signal is recorded/reproduced when the optical recording medium is irradiated with a laser beam made incident on the light-transmissive substrate, the optical recording medium incorporating: a light absorbing layer which is formed more adjacent to an incident point of the laser beam as compared with the reflecting layer, through which the laser beam passes and which absorbs light in an absorption wavelength region for the recording layer. Photo-deterioration of the recording layer composed of organic coloring matter occurs owing to a portion of natural light which has the wavelength which exists in the absorbing wavelength region for the organic coloring matter.

Abstract: Disclosed is a method for producing a heat mode type optical information-recording medium having, on a substrate, a dye recording layer capable of recording information by being irradiated with a laser beam, the method comprising the step of applying a dye solution for forming the dye recording layer onto the substrate while rotating the substrate, wherein a period of time, which ranges from a point of time at which application of the dye solution is started to a point of time at which a valve is fully open, is not less than 0.1 second. In order to satisfy this condition, the opening degree of a first speed controller is not less than 5% and not more than 50%. Accordingly, the opening speed of the valve of a valve apparatus is not less than 5% and not more than 50% with respect to the maximum speed.

Abstract: An optical recording medium having a light absorption layer formed on a substrate having a spiral groove by means of the vacuum deposition and a reflective layer formed on the light absorption layer, wherein: (1) the groove of the substrate has a groove section of which cross section is a trapezoidal; (2) a ratio of a groove width (W) to a track pitch (TP) (W/TR) of the substrate falls within a range of 0.25 to 0.45; (3) a groove depth (D) is 20 to 80% of (&lgr;/4n) (wherein A is a wavelength of a laser beam, and n is a refractive index of the substrate); and (4) angles a1 and a2 formed by both side surfaces of the groove section and surfaces vertical to a groove bottom surface on cross lines between the both side surfaces of the groove section and the groove bottom surface are 45 to 80°, and a difference between a1 and a2 (a1−a2) is not more than ±10°.

Abstract: An optical data recording medium in which the shape of the dye spectrum of a dye film having a thin film thickness per unit absorbance is controlled so as to enable improvements in the recording speed during high speed recording, jitter, and modulation, wherein the optical data recording medium is characterized in that 0<D/C≦100, and 80≦D/B, where D (nm) is the mean film thickness of the light-absorbing layer, C (Abs) is the maximum absorbance (based on molecular absorption) of the light-absorbing substance, B (Abs) is the maximum absorbance (based on association absorption) of the light-absorbing substance, D/C is the unit absorbance thickness based on the molecular absorption, and D/B is the unit absorbance thickness based on the association absorption.

Abstract: A polymer material is exposed to radiation of a type that changes some aspect of the polymer's radiation passing properties. The radiation that caused the property change is then contained by the material. The property change can be self-focusing or self-trapping light can be used. In that case, the same light that causes the photopolymerization is contained by the change in index of refraction that is caused by the polymerization.

Abstract: An optical disk for recording/reproducing information have the problem of the fine irregularities on its substrate surface that causes increase of noise, under the process of forming the recording layer capable of changing physically or chemically by irradiation of laser light. The problem could deteriorate the record and reproduction characteristics and bring about a defect on a life test or on its storage ability. To solve the problem, the present invention provides the method of manufacturing an optical disk having the pits-and-lands pattern whose organic material is modified by the ultraviolet light irradiation. The transmission of the substrate is not more than 50% at one wavelength in a wavelength region from 300 to 375 nm. And, thereby the surface of an optical disk substrate is smoothed to effect the reduction of the substrate noise and the improvement of record and reproduction characteristics.

Abstract: A chemical composition is provided for the manufacture of devices for storing and/or displaying information, comprising a network having a molecule which is formed from a metallic element Fe(II) which is bonded to a 1-2-4 triazole ligand (H-Trz), which molecule further comprises one or more than one anions A selected from BF4−, ClO4−, CO32−, Br−, Cl−, in accordance with the formulation: FeII(H-Trz)3A2, characterized in that this composition is used in the pure state in either one of the two crystalline phases (&agr;,&bgr;) at least one of which, referred to as the second phase (&bgr;), can be thermally induced on the basis of the other phase, referred to as the first phase (&agr;), at a temperature which is equal to or higher than a first reference temperature (To), which phases each show thermally inducible spin transitions between a low-spin state at a low first temperature (T&agr;1, T&bgr;1) and a high-spin state at a high second temperature (T&agr;2, T&bgr;2), the spin tran

Abstract: The invention relates to an optical storage medium comprising a substrate and a storage layer, wherein the storage layer comprises a compound of the formula (I) or (II) in which A and A′, independently of one another, are unsubstituted or mono- or di-halo-, -hydroxy-, —C1-C6alkyl-, —C1-C6alkoxy-, -cyano- or -nitro-substituted phenyl, pyridyl, pyrrolyl, imidazolyl, furyl or thienyl, which can, if desired, be fused to a benzene ring, are halide, tetrafluoroborate or unsubstituted or with one or more halogen substituted C1-C6alkane-sulfonate, benzenesulfonate, C1-C6alkylbenzenesulfonate, C1-C6alkylsulfate or di-C1-C6alkyl-phosphonate of N—C1-C6alkyl-pyridiniumyl, or are unsubstituted or mono- or di-hydroxy-substituted C2-C6alkyl or C2-C6alkenyl, whose chain may be uninterrupted or interrupted by one or two oxygen atoms, B and B′, independently of one another, are 2 H, S, S2 or SO2, and n and n′, independently of one another, are each a number from 1 to 4.

Abstract: An optical information recording disc of DVD (Digital Video Disc) type having an information recordable layer(s) between a pair of substrates (i.e., sandwich structure) shows an improved mechanical strength and an improved storage stability when the substrate has an exposed area on its outer peripheral edge and the exposed area is placed in contact with a resin layer, or the substrate has an enlarged surface area (preferably it is exposed) on its outer peripheral edge and the enlarged surface area is placed in contact with a resin layer. An apparatus for preparing an optical information recording disc of DVD type having an improved mechanical strength and an improved storage stability is further disclosed.

Abstract: A perishable media information storage mechanism, including a substrate, a data layer for recording data thereon the information storage mechanism, a reflective layer, and a protective lacquer coating. The data layer includes a material responsive to at least one predetermined data elimination factor and includes one of a decayable dye material, a liquid crystal material, a photosensitive material or a plurality of magnetoresistive memory cells. The data layer is characterized as recording data and eliminating access to data in response to at least one of a predetermined use or time factor. In addition, included is a method for fabricating a perishable media information storage mechanism including the steps of providing a substrate, forming a data layer on a surface of the substrate, forming a reflective layer on an uppermost surface of the data layer, and forming a protective coating on an uppermost surface of the reflective layer.

Abstract: An optical recording medium having a recording layer containing an organic colorant as the main component, whereby recording is carried out by changing the reflectivity by irradiation of a laser beam for recording having a wavelength of at most 700 nm, wherein when a light having substantially the same wavelength as the laser beam for recording and having an intensity selected from a range of from 1 to 4.5 mW and a pulse length of about 382 nsec, is irradiated while moving a portion to be irradiated of the medium at a relative velocity of 0.3 m/s to the light, the time required for the reflectivity to change and reach a saturated level, is at most 130% of said pulse length.

Abstract: A composition including a matrix comprised of particles comprised of a core resin and a shell resin thereover, wherein the core resin contains a covalently bonded photosensitive compound, and wherein the shell resin is the continuous phase of the matrix.

Abstract: The present invention provides a new category of information storage material, nonstoichiometric metal-organic complex Ag1−&bgr;(TCNQ), which is particularly suitable for digital video disc (DVD-R) operated by blue laser (wavelength 450 nm) or red laser (wavelength 650 nm), wherein, Ag is silver, TCNQ is tetracyano-p-quinodimethane C12H4N4, &bgr; is a parameter chosen by its performance and &bgr;≦0.4. The material can produce apparent absorption change under the incidence of the above-mentioned two different lasers. When used as optical recording medium, it has the advantages of high signal-to-noise ratio, fast response and low cost. The actual number of write-erase cycles can be larger than 20. Therefore, its performance is better than a conventional DVD-R.

Abstract: Optical disc, e.g., CD-R, DVD, DVD-R, comprising a polymer substrate and a radiation-cured coating provided by curing a radiation-curable coating composition having a pH greater than or equal to 3 and comprising at least one acrylate monomer, and advantageously diacrylate monomers and oligomers and monomers having acrylate functionalities of from 1 to at least 3, wherein the optical disc exhibits jitter of no greater than about 35 ns after being subjected to an environment having a temperature of at least 80° C. and a relative humidity of at least 85% for a period of at least 96 hours.

Abstract: A recording medium comprising a hydrophilic film formed on a substrate, recording domains formed directly on the hydrophilic film so as to form a predetermined pattern, each recording domain being made of an organic dye molecule and having a size of 50 nm or less, and an isolation region surrounding the recording domains, the isolation region being made of an organic molecular film.

Abstract: In a method for producing an optical recording medium by forming a recording film on a substrate by means of vapor deposition of a pigment material in a high vacuum condition, the temperature (° C.) of an evaporation vessel for heating and evaporating the pigment material is not more than 2.5 times as high as the evaporation starting temperature of the pigment material.

Abstract: An optical recording medium is provided in which a recording layer contains a salt-forming dye between an ion of an azo metal complex of the following formula (I) and an ion of a cyanine dye of the following formula (II), having a complex index of refraction in the wavelength region of recording light and/or reading light whose imaginary part k is up to 0.20, or at least one of azo oxovanadium metal complexes having an azo compound of the following formula (III) as a ligand and metal complexes having azo compounds of the following formulae (IV) and (V) as a ligand. Recording and reading can be carried out at a conventional wavelength or a short wavelength of about 630-690 nm or both.