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| Number | Title | Issue Date |
| 6124075 | Laser ablative recording material The present application discloses a laser ablative recording material which has one or more image forming layers on a support, and one or more intermediate layers between said image forming layer and said support, wherein: at least one layer from among th... | 09/26/2000 |
| 6122228 | Magneto-optical recording medium and reproduction method therefor A magneto-optical recording medium comprises, on a substrate, a dielectric layer, a GdFeCo reproducing layer, a non-magnetic layer, and a TbFeCo recording layer. Upon reproduction, a DC magnetic field Hex is applied in the recording direction, and a repro... | 09/19/2000 |
| 6120907 | Data card comprising a laser recording medium and a thin glass layer According to the present invention a data card is provided which comprises a heat-mode laser recording medium on a support and wherein said laser recorder medium is covered by a thin flexible glass layer. The data card has a higher mechanical strength, an... | 09/19/2000 |
| 6120870 | Optical disk and production method thereof An optical disk having high density and excellent quality as well as compatibility with conventional disks is provided. This optical disk is comprised of a disk-shaped substrate formed with a cyclic olefin polymer as its main component and a light-curing ... | 09/19/2000 |
| 6117512 | Optical information medium and manufacturing method therefor An optical information mediumis made up of a transparent substrate, on which are formed a dye recording layer of at least one dyestuff, a reflective layer of metal, and a protective layer in sequence, wherein said protective layer is formed from a plurali... | 09/12/2000 |
| 6117511 | Optical recording media An optical data recording medium utilizing reversible inter-crystalline-amorphous phase changes for recording, reproducing and erasing data as phase changes of a recording film caused by laser beam irradiation. The medium is formed by a lamination of a tr... | 09/12/2000 |
| 6117284 | Dual-layer DVD disc, and method and apparatus for making same A dual-layer DVD disc that does not require a stamping step (typically, as part of the 2P prior art manufacturing process) during its manufacture. A polycarbonate substrate is molded and coated with a semireflective data layer in the usual way. A PMMA sub... | 09/12/2000 |
| 6114087 | Optical recording medium An optical recording medium comprising a substrate having a pre-groove for focusing and tracking servo operation, and a recording film formed on the substrate, the recording film having optical properties which change in response to the application of at ... | 09/05/2000 |
| 6114001 | Optical information recording medium, and method for fabricating it In an optical recording information recording medium of a structure having protection layers on both surfaces of a recording layer, overwrite cyclability is improved without deteriorating the reliability of recorded data. To achieve this, the first protec... | 09/05/2000 |
| 6111849 | Phase change optical recording medium, method of overwriting same and recording system for the overwriting An optical recording medium comprising a substrate, at least one dielectric layer and a phase change type recording layer. In overwriting, the recording medium should satisfy the condition VOW /VOP | 08/29/2000 |
| 6103331 | Optical recording medium comprising organic dye thin film This invention provides an optical recording medium complying with the DVD standards, having high sensitivity, possessing high dye film stability, having a high C/N ratio during high density recording, and being capable of reducing jitter components conta... | 08/15/2000 |
| 6103330 | Optical recording medium and fabrication method therefor The invention provides a method of fabricating an optical recording medium comprising a phase change type recording layer containing at least one element selected from In, Ag, Te and Sb. The recording layer is formed by a sputtering technique wherein sput... | 08/15/2000 |
| 6099930 | Methods for marking digital compact discs as a means to determine its authenticity A digital recording medium, such as a compact disc, having a substrate, a reflective layer and a protective layer includes a near infrared fluorophore in one of the layers. The near infrared fluorophore can be incorporated into the CD by coating, admixing... | 08/08/2000 |
| 6096399 | Optical recording medium A phase change type optical recording medium of Ge--Sb--Te system wherein number of overwritable operation has been increased is provided. The optical recording medium has a substrate and a recording layer of phase change type on the substrate, and the re... | 08/01/2000 |
| 6096398 | Phase-change optical recording medium A phase-change optical recording medium has a substrate, and a lower heat-resistant protective layer, a recording layer capable of recording and erasing information by utilizing changes in the phase of a phase-change recording material in the recording la... | 08/01/2000 |
| 6086993 | Magneto-optical recording medium A magneto-optical recording medium capable of direct overwriting in a light intensity modulation mode comprises a magnetic multilayer structure comprising, in order form an surface side thereof, a readout layer R01, a memory layer M1... | 07/11/2000 |
| 6083598 | Information recording medium, method for manufacturing the medium, and apparatus for manufacturing the medium In an optical disk obtained by pasting two substrates, air bubbles and the like are removed from an adhesive layer between the substrates pasted together, and the thickness irregularity of the adhesive layer is suppressed to an allowable value or less. A ... | 07/04/2000 |
| 6083597 | Information recording carrier and manufacturing method thereof An information recording carrier has a substrate with at least one fine pattern row. On the substrate, a recording layer, a delamination-proof layer and a protective layer are sequentially superposed. In manufacturing, firstly, the recording layer is form... | 07/04/2000 |
| 6077585 | Optical recording medium and method of preparing same An optical recording medium having at least one aluminum nitride and silicon nitride composite dielectric layer is provided. The amount of aluminum nitride in the dielectric layer, x, is more than zero and less than or equal to about 95 mol %. The amount ... | 06/20/2000 |
| 6077582 | Optical disc, process for producing the optical disc and its manufacturing apparatus An optical disc comprising a disc having a signal- recording layer, wherein a treated layer having a surface electric resistance of from 1×103 to 1×1013 Ω is formed on the signal-recording layer, and the surface of the treated lay... | 06/20/2000 |
| 6071587 | Optical recording medium and its recording method An optical recording medium of phase change type which exhibits an increased number of overwritable operations is provided. The optical recording medium comprises a substrate, and a first dielectric layer, a recording layer, a second dielectric layer, and... | 06/06/2000 |
| 6067246 | Method for writing data to and reading multiple bit data words from a DNA optical storage device An optical memory system includes memory cells which utilize synthetic DNA as a component of the information storage mechanism. In the preferred embodiment, memory cells contain one or more chromophoric memory units attached to a support substrate. Each c... | 05/23/2000 |
| 6066381 | Write-once-read-many type optical disk and method for fabricating the same A write-once-read-many type optical disk and a method for fabricating the same. The write-once optical disk includes a thin Fe--Zr--H recording layer formed on a substrate.... | 05/23/2000 |
| 6067285 | Optical disc An optical disc having a recording film formed on one surface of a plastics substrate transparent to light, a first protection film formed on the recording film, a moisture proof film formed on the other surface of the substrate, and a second protection f... | 05/23/2000 |
| 6063469 | Triple substrate optical disk and manufacturing method thereof A triple substrate optical disk comprises a center substrate layer, a top substrate layer, a bottom substrate layer, a top adhesion layer bonding the top substrate layer to the center substrate layer and a bottom adhesion layer bonding the center substrat... | 05/16/2000 |
| 6063468 | Optical recording medium An improved optical recording medium is provided, and includes a surface of the optical recording medium having at least pits and grooves formed therein, a recording layer formed adjacent the surface of said optical recording medium, and a light transmiss... | 05/16/2000 |
| 6063467 | Optical recording medium An optical recording medium including a substrate which transmits light, which has a main surface, and which has a groove defined in the main surface; a recording layer formed on the main surface; and a metal reflection layer formed on the recording layer... | 05/16/2000 |
| 6057020 | Optical recording medium and recording and/or reproduction method using the same An optical recording medium has a substrate and a recording layer which is formed on the substrate and contains an azo metal chelate compound including an azo moiety of formula (I) and a bivalent or trivalent metal; ##STR1## wherein X is OH group, Co... | 05/02/2000 |
| 6051298 | Optical disc having protective films A high density optical disc having an optical disc protective structure for enabling a high density information recording and retrieval optical disc. The optical disc includes: a first protective film coated by a few tens of microns, on the reading surfac... | 04/18/2000 |
| 6048597 | Optical device and manufacturing method thereof An optical disc in which a desired exchange reciprocal action is displayed between two sorts of the rare earth-transition metal alloy films to realize optimum recording/reproducing characteristics, and a manufacturing method for the optical disc. To this ... | 04/11/2000 |
| 6046973 | Integrated read/write head for ferroelectric optical media An integrated read/write head structure saves and retrieves saved data stored in storage locations on a ferroelectric optical storage medium. A first ultra-violet light source generates a single beam for exciting the electrons of a ferroelectric molecule ... | 04/04/2000 |
| 6045971 | Optical information recording medium and method of producing the same An optical information recording medium includes a substrate, and a light absorption layer formed thereon which includes a phthalocyanine compound (I), a phthalocyanine compound (II) and a phthalocyanine compound (III) as specified in the specification. T... | 04/04/2000 |
| 6045889 | Recording medium A recording medium is for recording information by varying optical characteristic thereof by application of an external energy thereto, and includes a first substance and a second substance. When the external energy is applied to the recording medium, the... | 04/04/2000 |
| 6045888 | Optical volume memory An optical memory material includes a two-photon storage component which can be written from a first to a second state in response to WRITE light, mixed with a signal component which fluoresces by one-photon absorption only at the written locations in res... | 04/04/2000 |
| 6042920 | Optical quality copolycarbonates containing polyoxyalkylene carbonate units Copolycarbonates comprise structural units derived from a bisphenol such as bisphenol A, a spiro(bis)indane bisphenol such as 6,6'-dihdyroxy-3,3,3',3'-tetramethyl-1,1'-spiro(bis)indane and a polyoxyalkylene glycol such as polyethylene glycol. These copoly... | 03/28/2000 |
| 6042921 | Optical recording medium and read/write method therefor The invention provides a phase charge type optical recording medium comprising on both sides of a recording layer dielectric layers, each containing zinc sulfide and silicon oxide as main components. The medium comprises on a substrate 2 a first dielectri... | 03/28/2000 |
| 6042919 | Structurally stable optical data storage medium An improved optical data storage medium and a method of forming and utilizing such a medium. One such optical data storage medium has a substrate having an upper surface including a series of physical deformations which encode data. A reflective film stac... | 03/28/2000 |
| 6040066 | Rewritable optical information medium A rewritable optical information medium has a phase-change recording layer (3) on the basis of an alloy of Ge-Sb-Te-O, having the composition (Gea Sbb Tec)1-d Od, wherein: a+b+c=1 0.0001 a d a 0.035 The ad... | 03/21/2000 |
| 6037099 | Optical disk Opposed faces of two disk substrates are bonded by an adhesive layer whose characteristic parameters are set in predetermined ranges, particularly in the values of a product of Young's modulus and the film thickness in a range of 1.0×10-2 kg/m... | 03/14/2000 |
| 6033752 | Optical recording medium and method for recording optical information The present invention provides an optical recording medium which incorporates an inorganic based recording layer which has a high reflectance, sufficient for reproduction compatibility on devices such as CD-ROM drives, as well as a high degree of modulati... | 03/07/2000 |
