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| Number | Title | Issue Date |
| 8116192 | Optical recording medium with write-once and rewritable properties A write-once optical recording medium is described, which in addition to the write-once properties also has rewritable properties. The optical recording medium has a recording layer with at least a first recording sublayer and a second recording sublayer for recordi... | 02/14/2012 |
| 8077589 | Optical recording medium, erasure apparatus and erasure method thereof A new optical recording medium capable of reducing the burden in erasing data in the optical recording medium is provided. The optical recording medium includes an organic pigment recording layer 12 and a light reflecting layer 14, which are at least l... | 12/13/2011 |
| 8031581 | Optical disc and optical disc device Provided herein is an optical disc having: an optical plotting layer 17 which is formed at a label surface B-side and on which an image is formed by heat change with a laser beam 28 emitted from a recording surface A-side; a protective layer 18 ... | 10/04/2011 |
| 7830779 | Method of recording information, equipment thereof and information recording medium Because conditions for recording identification data of a medium vary in accordance with the structure of different media, such as a single-layer or a multiple-layer structure, stable data recording has been a difficult task. To solve this problem, an incident side ... | 11/09/2010 |
| 7760615 | Rewritable phase-change optical recording medium A rewritable phase-change optical recording medium is provided, which includes a substrate, a first information layer, a spacer layer, a second information layer, and a cover layer. The second information layer includes a recording film containing Sb as a main compo... | 07/20/2010 |
| 7668071 | Phase-change optical recording medium having tracking signal smaller than saturation value A phase-change optical storage medium has a substrate and a recording layer having a plurality of tracks for storing information. A material of which the recording layer is made has been initialized in a crystalline state in which an amplitude of a tracking-detectio... | 02/23/2010 |
| 7422838 | Phase-change optical recording medium A phase-change optical recording medium is disclosed including a supporting substrate and the following contiguous layers formed on the supporting substrate in the order recited such as a first dielectric layer, a recording layer, a second dielectric layer, a metal/... | 09/09/2008 |
| 7420911 | Information recording carrier and information reproducing apparatus for the same Plural grooves or lands formed in an information recording carrier include at least a wobbling region and data is recorded wobblingly in this wobbling region by phase shift modulation while recorded digitally with a single or multiple waves as a channel bit. ... | 09/02/2008 |
| 7420908 | Optical recording medium An optical recording medium including two or more recording layers which are capable of transmitting at a high transmittance recording light or reproducing light for performing recording/reproducing of a first recording layer (3) without having to make the th... | 09/02/2008 |
| 7414924 | Magneto-optical recording medium having watermark for preventing unauthorized copy An optical disk that includes main information and write-once information recorded on the optical disk. The write-once information is recorded as information unique to the optical disk, and the write-once information stores at least watermark production parameters f... | 08/19/2008 |
| 7411887 | Optical information recording medium A phase-change optical information recording medium in which information can be recorded, reproduced and rewritten and which includes a first transparent substrate having a wobbling guide groove which is spirally formed thereon at a pitch; a first dielectric layer l... | 08/12/2008 |
| 7388825 | Optical data storage and retrieval systems utilizing dual energy sources An optical data storage and retrieval system that includes a phase change storage medium and dual energy sources. The phase change material may store information by undergoing a transformation from one structural state to another structural state through application... | 06/17/2008 |
| 7385907 | Rewritable optical record carrier A rewritable optical record carrier comprising a first substrate carrying a first recording stack of layers, which recording stack comprises, a first dielectric layer, a recording layer comprising a phase-change recording material, a second dielectric layer, and a m... | 06/10/2008 |
| 7371448 | Phase-change recording media based on the Ga-Sb-Te system for ultra-high density optical recording This invention discloses a novel rewritable phase-change recording medium for optical data storage, which is based on the GaSbTe ternary alloy system. The designed compositions reside on the Sb7Te3—GaSb and Sb2Te3—GaSb... | 05/13/2008 |
| 7372792 | Write-once optical disc, method and apparatus for recording management information on write-once optical disc A write-once optical disc, and a method and apparatus for recording management information on the write-once optical disc, are provided. The optical disc includes at least one recording layer, and at least one SRR entry. Each SRR entry corresponds to an SRR and incl... | 05/13/2008 |
| 7372801 | Reproduction-only optical disc and method of recording and/or reproducing data on and/or from the same A reproduction-only optical disc has a lead-in area, a user data area, and a lead-out area. Disc related information recorded on at least one of the lead-in area and the lead-out area is recorded by high frequency groove wobbles, and data of the user data area is re... | 05/13/2008 |
| 7368222 | Optical data storage media with enhanced contrast Disclosed is an optical data storage medium with enhanced contrast. The optical data storage medium includes a substrate having oppositely facing first and second surfaces. A first metal/alloy layer is formed overlaying the first surface of the substrate. The first ... | 05/06/2008 |
| 7368221 | Changing light absorption by disruption of conjugation Copy-protected optical medium utilizing a composition comprising a transient optical state change security materials constrained to change the optical state light absorption at a wavelength of about 400 nm and an electron transfer agent. ... | 05/06/2008 |
| 7368223 | Multi-stack optical data storage medium and use of such a medium A multi-stack optical data storage medium for rewritable recording by a focused laser-light beam, the medium having a substrate with deposited on aside thereof: a first recording stack comprising a phase-change type recording layer... | 05/06/2008 |
| 7358031 | Optical information recording medium, optical information recording device and manufacturing method of optical information medium A multilayer optical information recording medium includes optical information recording layers, and dielectric multilayer reflecting layers provided under the optical information recording layers respectively. Each of the dielectric multilayer reflecting layers inc... | 04/15/2008 |
| 7357969 | Phase-change optical recording medium A phase-change optical recording medium has a first information layer including a phase-change optical recording film arranged in a position close to the light incident side, a second information layer including another phase-change optical recording film arranged i... | 04/15/2008 |
| 7359310 | Optical recording medium An optical recording medium includes a support substrate and two information recording layers, an information recording layer close to a light incidence plane through which a laser beam is projected including a first dielectric film, a second dielectric film and a r... | 04/15/2008 |
| 7359299 | Recording medium and reading system A medium judgment program is recorded on an information recording medium. The program causes a computer to judge whether the medium is authorized. The judgment may be based on information on a unique value preformed in the medium in regard to each of the media. If t... | 04/15/2008 |
| 7355940 | Optical disk apparatus and waiting method thereof An optical disk apparatus including a waiting position determining circuit which detects physical properties of each region in an optical disk after recording or reproducing processing is finished and decides a waiting position of an optical head according to the de... | 04/08/2008 |
| 7352670 | System and method for optical media information storage life tracking Expiration information stored on an optical medium is applied to determine an expiration date of the optical medium that provides a predetermined reliability of information archived on the optical medium, such as a predetermined acceptable defect level of the inform... | 04/01/2008 |
| 7352658 | Method for recording information data to a recording medium by irradiation with a light beam and application of a magnetic field A magnetic recording medium comprises a first magnetic film and a second magnetic film on a substrate. The second magnetic film is composed of a magnetic material preferred for recording and reproduction, and the first magnetic film is composed of a ferrimagnetic ma... | 04/01/2008 |
| 7352686 | Limited play optical devices with interstitial reactive layer and methods of making same A data storage device comprises a first substrate and a second substrate, wherein at least the first substrate has defined thereon a plurality of pits and lands covered by a reflective material; and a bonding layer between the first and second substrates including a... | 04/01/2008 |
| 7351516 | Optical information recording medium An optical information recording medium, especially a CD-RW medium, that can undergo direct overwriting at high speed is disclosed. The optical information recording medium includes a transparent substrate, at least a recording layer and a reflective layer on or abo... | 04/01/2008 |
| 7352680 | Optical recording medium having relation between reflection layer and pit length An optical information recording medium including a substrate, a light absorbing layer which is located overlying the substrate and in which marks are formed to store information and a light reflection layer located overlying the light absorbing layer including a cr... | 04/01/2008 |
| 7349324 | Reproducing system and corresponding information recording medium having wobbled land portions An information recording medium is at least composed of a substrate having a microscopic pattern constituted by a continuous substrate of grooves formed with a groove portion and a land portion alternately, a recording layer formed on the microscopic pattern for rec... | 03/25/2008 |
| 7345984 | Information storage medium, recording method, reproducing method, and reproducing apparatus An information layer 0 comprises a system lead-in area, data lead-in area, data area, and middle area, an information layer 1 comprises a system lead-out area, data lead-out area, data area, and middle area, an end position of the data area of layer | 03/18/2008 |
| 7339880 | Method of recording information to and reproducing information from an optical information storage medium A method of recoding information on a reproduction-only optical information storage medium, including: forming a plurality of areas and at least one transition area on the reproduction-only optical information storage medium. Each transition area is located between ... | 03/04/2008 |
| 7335459 | Phase-change optical recording medium A phase-change optical recording medium includes a phase-change optical recording film that permits reversible phase change between a crystalline phase and an amorphous phase upon irradiation with light, and an interface film formed of hafnium oxide, or a mixture of... | 02/26/2008 |
| 7330562 | Watermarking in the time-frequency domain Methods and systems for time-frequency domain watermarking of media signals, such as audio and video signals. An encoding method divides the media signal into segments, transforms each segment into a time-frequency representation, and computes a time-frequency domai... | 02/12/2008 |
| 7330945 | Recording medium, and method and apparatus for managing defective areas of recording medium A recording medium and a method and apparatus for managing defective areas of the recording medium are provided. The method includes allocating, in a data recording direction, a spare area of a certain size in an information area of the recording medium as a data re... | 02/12/2008 |
| 7327666 | Optical recording medium and method of manufacturing same An optical recording medium has a plurality of laminated information recording layers. The average reflectivity within a stipulated range in the unrecorded regions of at least one of the information recording layers has a value between the reflectivity in the crysta... | 02/05/2008 |
| 7315508 | Multi-layer optical disk and method of producing multi-layer optical disk A multilayer optical disk including a plurality of information storage layers to/from which information is recorded and/or reproduced by an optical head. The plurality of information storage layers are stacked through intermediate layers and each information storage... | 01/01/2008 |
| 7304930 | Optical information recording medium and recording method using the same An optical information recording medium 10 includes a first substrate 11, a second substrate 12 disposed in parallel with the first substrate 11, and an information layer 20 disposed between the first substrate 11 and the se... | 12/04/2007 |
| 7304916 | Optical head, information storage apparatus, optical head design apparatus, and optical head design program storage medium An optical head has a first propagation section made of a first low extinction material and installed along an optical axis, a pair of second propagation sections which, being made of a second low extinction material, sandwich the first propagation section, a pair o... | 12/04/2007 |
| 7304774 | Holographic recording medium A holographic recording medium 10 includes: a recording layer 12; two substrates 14 and 16 sandwiching the same; and a photosensitive protective layer 18 covering these recording layer 12 and substrates 14 and 16 | 12/04/2007 |
