Matches 301 - 350 out of 554 < 1 2 3 4 5 6 7 8 9 10 11 12 >
Match Document Document Title
5846627 Method for writing and reading data on a multi-layer recordable interferometric optical disc and method for fabricating such  
A recordable compact disc comprises a 0.6 millimeter clear plastic or glass substrate on which is grown a thin-film image layer having several distinct recording planes. Each recording plane is...
5846626 Optical recording medium and method of producing same  
An optical recording medium capable of recording and/or reproducing an information by using a laser beam, comprising: a support layer having an information signal-recording portion on one side...
5846625 Optical recording medium and information processing apparatus used therefor  
An optical disk apparatus using an optical disk in which a layer (a reflectivity adjustment layer) in which the optical constants are changed by melting at the time of irradiation of light is...
5843553 High performance media for optical recording  
A recordable element including a substrate and having over its surface, in order, an optical recording layer and a light reflecting layer, the improvement includes an optical recording layer...
5840466 Optical recording media and their production methods  
An optical recording medium, wherein a recording layer is formed on a substrate to which a light beam is applied to record, erase, and read data with said recording and erasing of data being...
RE35947 Optical element having durability enhancing layer  
An optical element is provide which has a durability enhancing layer. There is provided an optical disk comprising a support having on one surface thereof, in order: a) a recording layer such...
5824385 Optical disc and method for manufacturing the same  
An optical disc has a pair of light-transmissible circular substrates each having an inner non-data region disposed around a center hole thereof, a data region disposed around the inter non-data...
5820960 Thin zirconia disk substrate  
This invention relates to a disk substrate consisting essentially of zirconia partially stabilized by a rare earth oxide, the disk substrate having a thickness of no more than 0.635 mm, a diameter...
5820961 Laminated optical discs  
In order to provide a laminated optical disc having a sufficient display portion and a reliable print display, a pair of disc substrates are bonded together to form an optical disc, in which one...
5817388 Multi-component dye compositions for optical recording media  
The present invention is directed to a dye composition for use in CD-R recording media and having reduced wavelength dependence of the dye layer absorption, comprising: (1) a first cyanine dye...
5818808 Optical recording process and optical recording system  
An optical recording process for recording data on a recording medium of phase-change type employs laser power modulation scheme for mark-length modulation recording. The process selects one of...
5817389 Optical disk  
It is an object of the present invention to increase an amount of information recorded on an optical disk having at least two information recording layers. An optical disk having a plurality of...
5811217 Optical information recording medium and optical information recording/reproducing method  
An optical information recording medium, which includes a substrate, and a recording thin film layer provided on the base material and adapted to form variation in an amount optically detectable by...
5810979 Magnetooptical recording medium, method for producing the same, method for recording or reproducing information in or from the same  
A method of producing a magneto-optical recording medium provided with a reproducing layer on a recording film on a substrate, the reproducing film being in-plane magnetized at room temperature and...
5796708 Optical recording medium and recording system  
An optical disc is constructed for operation in an alloying mode and includes first recording sublayer of Ge--Sb--Te and a second recording sublayer of Bi--Te. Apparatus is provided for recording...
5792538 Playable optical picture disc  
A single or multi-sided, single or multi-layered optical data disc in which graphical information resides beneath all layers of data information, while maintaining playability. The graphical...
5789055 Optical recording medium and a method of fabricating the same  
An optical recording medium of phase change improves the erase ratio and the repeat writing characteristic by coexistence of an amorphous phase and a crystalline phase at the stage of initiation so...
5789053 Bonded disc and an apparatus for manufacturing the same and the manufacturing method thereof  
Two disc bases D having different information are molded in a time by a pair of cavities formed when clamping the molds 1 and 2, which are filled with the molten resin by being injected. After...
5790513 Magneto-optical recording medium capable of super resolution reproduction and information reproduction method using the same  
A magneto-optical recording medium includes a first magnetic layer which becomes an in-plane magnetization film at room temperature, and a perpendicular magnetization film at a temperature between...
5786078 Magneto-optical recording medium  
A magneto-optical recording medium comprising a transparent substrate, a first dielectric layer on the substrate, a magneto-optical recording layer on the first dielectric layer and a metal...
5787069 Protective cover for an optical disc  
There is provided a new and useful protective cover for an optical disc of circular configuration having a circular aperture centered therein and having an outer edge. The protective cover is a...
5776574 Optical recording medium and optical recording/reproducing apparatus  
An optical recording medium, which has a land and a groove on which a record mark is formed, comprises a transparent substrate, an inner protection layer formed on the substrate, a recording...
5776575 Information recording medium and process for production thereof  
An information recording medium including a substrate, a recording layer, a protective layer, a print layer on the protective layer, and a barrier layer located intermediate the print layer and the...
5774448 Air sandwiched optical discs with closable pressure relief holes  
An optical disc is disclosed having a substrate in which data can be written on or read from, such optical disc being adapted to be inserted and clamped onto a spindle in a disc drive and having a...
5774447 Optical discs with cover sheets and dynamic pressure stabilization of the enclosed air  
An optical disc having a substrate in which data can be written on or read from, such optical disc being adapted to be inserted and clamped onto a spindle in a disc drive and having a transparent...
5773116 Focused ion beam micromilling and articles therefrom  
An ultrahigh vacuum focused ion beam micromilling apparatus and process are isclosed. Additionally, a durable data storage medium using the micromilling process is disclosed, the durable data...
5766718 Longitudinal magnetic recording medium and apparatus  
It is disclosed that a longitudinal magnetic recording medium and apparatus has recording sections having longitudinal magnetic films magnetically isolated in a recording direction. The...
5764600 Overwritable, high-density magneto-optical recording medium and recording/reproduction method therefor  
A recording/reproduction method for recording or reproducing information using the magneto-optical recording medium, the magneto-optical recording medium comprising a first magnetic layer...
5763037 Base for optical recording medium and stamper for manufacturing base of optical recording medium  
A stamper for manufacturing a base of an optical disc where grooves having a track pitch of 1.6 μm and width of 1.3 μm or less are formed by using synthetic resin material includes a plurality of...
5764621 Optical disc with a plurality of recording layers  
When a laser beam from an optical pickup is incident on an optical disc, the optical disc comprises a protective layer, a first recording layer having a desired pattern, a coating layer by which...
5757765 Disc protection structure  
A protection structure adapted for protecting a disc includes a film mounted on an underside of the disc for covering a data reading region of the disc. The film includes an inner rim portion...
5750228 Optical information storage medium  
An optical information storage medium includes a multilayer structure formed on a substrate. The multilayer structure is formed by a sputtering process in a discharge gas and includes at least a...
5747136 High-density magneto-optic disk and method of manufacturing the same  
A magneto-optic disk has a readout layer formed of a bismuth-substituted garnet having a chemical composition represented by Bi x R 3 -x M y Fe 5 -y O 12 and a recording layer formed of a...
5741603 Optical disc  
An optical disc comprising transparent substrate, a phase-changing material layer disposed on the transparent substrate and made of a material which is phase-changeable by radiation of a light...
5738950 Magnetooptical recording medium  
A magnetooptical recording medium is constituted of a quaternary amorphous magnetic alloy of Gd--Tb--Fe--Co.
5733623 Recording media for recordable element  
A recordable element with improved performance, and a method of making such element is disclosed. The recordable element includes a substrate and an optical recording layer deposited on the...
5733622 Edge strengthened substrate of a data storage disk and method for fabricating same  
An edge strengthened substrate of a data storage disk and a method for fabricating same is disclosed. A strengthening agent is preferably applied to selected portions of a disk-shaped glass...
5731054 Mixtures of low K metallized formazan dyes with symmetrical and unsymmetrical cyanine dyes  
A mixture of low k metallized formazan dye with symmetrical and unsymmetrical cyanine dyes is disclosed. The mixture is useful in optical recording layers of optical recording elements.
5728441 Recordable/replayable optical recording medium and optical recording method therefor  
In a recordable/replayable optical recording medium having a thin metal recording layer and an optical recording method therefor, the optical recording medium includes a substrate, a thin metal...
5725931 Constrained layer damper with slit(s) and/or cutout(s)  
The present invention provides a constrained layer damper having slits and/or cutout(s) therein, which provides improved vibration damping performance. The constrained layer damper of the invention...
5718961 Phase change type optical disk  
An optical recording medium is provided in which a first dielectric film, a second dielectric film, a recording film, a reflective film are sequentially stacked on a substrate, said first...
5718960 Bonded composite disk, and method and apparatus for producing the same with consistent adhesive thickness  
Method and apparatus for forming a first and a second component disk which are bonded together to produce a bonded composite disk, wherein a first mold for forming the first component disk includes...
5719850 Optical storage medium with first layer containing optically readable information overlying second layer containing visible information  
An optical card comprising an optical storage material for optically storing information and a visible information layer for storing visible information. The optical storage material has specific...
5714222 Optical recording medium and process for producing same  
The optical recording medium has an optically transparent substrate having a center hole, a recording layer formed on the substrate, and a protective layer. The protective layer has an opening...
5715225 Multilayer optical data storage device  
A multilayer optical data storage device is disclosed which has at least two spaced apart storage layers, each of such layers being adapted to store information; a spacer layer positioned between...
5705247 Optical information medium and method for fabricating the same  
An optical information medium providing a protective layer above an optically transparent substrate to protect a recording part, and can record information which is optically readable by means of...
5700539 Thin film and interferometric optical disk media and mass production method for fabricating such and multi-layer CDS  
An optical disk records digital information in optically-reflective layers that each vary in thickness between constructive interference of a monochromatic light and destructive interference of the...
5700540 Optical recording medium  
An optical recording medium comprising a substrate with grooves, a surface smoothing layer less than 1 μm thickness deposited on the grooved substrate, and a recording layer. The medium reduces...
5698284 Optical recording medium  
The present invention relates to an optical recording medium which has excellent scratch resistance and resistance to cracking derived from warpage and bending. It comprises a card substrate; and,...
5681632 Optical information recording medium  
On a substrate, a recording layer which reversibly transforms between two states with different optical properties--a crystalline phase and an amorphous phase--by the irradiation of a laser beam, a...
Matches 301 - 350 out of 554 < 1 2 3 4 5 6 7 8 9 10 11 12 >