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7391708 Optical disc and method for reproducing the same  
The present invention provides a technique for improving reliability of reading header information. The optical disk is composed of a recording track. The recording track includes a data recording...
7390618 Manufacturing method of microstructure, manufacturing method and manufacturing device of electronic device  
Minute structures are obtained by exposing a process target material and changing the shape thereof by relatively shifting a laser beam or electron beam against the process target material and...
7388826 Optical recording medium capable of recording three data values  
An optical disc medium 10 having a wobbled track groove 12 includes three wobble patterns including a flat wobble pattern, a positive pulse wobble pattern, and a negative pulse wobble pattern....
7385911 Optical recording medium having multiple layers of different thermal conductivities  
In an information recording medium according to the present invention, a recording layer, a first layer, and a second layer are formed so that a thermal conductivity of the first layer that...
7385909 Recording medium, information recording and reproducing method, and recording and reproducing apparatus  
Conventionally, as in the case of switching between a DVD-R and a DVD-RAM, when the method of record mark arrangement in a track is changed, the physical format of the disk is also changed. This...
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...
7382715 Optical recording medium having relationship between pit depths, wavelength and refractive index  
A medium for optical recording is disclosed, from which recorded information is reproduced by a laser beam. The medium includes a disk board having a recording surface, and multiple pits in the...
7382714 Recording/reproducing apparatus  
A recording apparatus for use with a reproduction-only optical information storage medium, including: a recording unit which records data on the reproduction-only optical information storage...
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...
7370367 Security device and article incorporating same  
A compact disc ( 10 ) for a computer incorporates a security device for preventing non-authorized reading of data carried by the disc. The security device includes an LCD laser blocker ( 16 ) which...
7369483 Pre-formatted linear optical data storage medium  
A pre-formatted optical data storage tape ( 10 ) including an elongated linear polymer layer having at least one pattern of optically readable embossments ( 114 ) on at least one surface of the...
7360228 Multi-stack optical data storage medium and use of such medium  
A multi-stack optical data storage medium, for recording using a focused radiation beam having a wavelength λ and entering through an entrance face of the medium, has a first substrate having a...
7355957 Optical disc medium having a system information recording area of low recording density  
In order to stably carry out reproduction of information in an optical disc medium ( 10 ) using a PRML (partial-response maximum-likelihood) method for reproducing the signal, the optical disc...
7355947 Optical disk device and optical disk  
In an optical disk of HD-DVD, data is recorded in both grooves and lands. A groove track includes its own data region called a groove (G) track address system formed therein and a land track...
7352685 Reverse optical mastering for data storage disk replicas  
A data storage master disk and method of making a data storage master disk. The data storage disk master is for use in a data storage disk replication process. The data storage disk molding...
7352681 Optical disc for data storage with invisible tracks and method of making same  
An optical disc and a method of making the same are provided in which the tracks on the disc are not numbered in strict numeric sequence. For example, a disc may contain only odd or only even...
7345987 Optical disc which stores digital information in informational units which diffract a line of laser light at one of 1024 angles and a corresponding light detecting apparatus for reproducing information from said optical disc  
The present invention includes an optical disc whose informational units each contain a raised pad designed to reflect laser light at a compound angle which is 45 degrees from the disc surface and...
7342871 High density optical disc and method for reproducing and recording data thereof  
A high-density optical disc such as a high density-digital versatile disc (HD-DVD) or Blu-ray disc, and a method for reproducing or recording data of the high-density optical disc. The high-density...
7342866 Optical disc and its information recording method and apparatus  
Recording timing of a Data segment is set so as to avoid locating a wobble modulated portion as preformat information which indicates information on Physical segments of a recording type optical...
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...
7339875 Information storage medium, playback and recording method  
An information storage medium includes a substrate forming a first groove having a depth, and a second groove adjacent to the first groove and different depth from the first groove; and a recording...
7339871 Method for accurate positioning of marks and spaces on an optical disc  
An optical disc has spatial features (notches, bumps, etc.) that intentionally distort the analog Read Data signal. For a mark or space that is centered on a spatial feature, the distortion does...
7336596 Optical storage medium  
An optical disk consists of a first laminated layer structure and a second laminated layer structure. The first structure has a first transparent substrate having a first surface and a second...
7336595 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...
7330418 Optical disk with plural signal mark positions in a direction substantially perpendicular to tracks  
An optical disk device has a light source which emits light; and light converging means of, in each of signal mark forming regions, each of lands, or each of grooves of an optical disk, converging...
7327843 Data reproducing device, hard disk, and data storing disk  
A hard disk A has is constructed to include: a disk 10 in which copy protection information is written in advance in a surface shape such as slits or corrugations in a pre-recording region 13 ...
7324420 Optical disc and method of identifying recording layer  
An optical disc in which a physical address of each smallest recording unit and a recorded address increase or decrease on first and second recording layers, and a method of identifying the...
7321544 Optical recording medium including identification region constituted of protrusions and recesses  
The present invention is intended to provide an information recording medium in which ID regions (identification regions) have a high recording density. The information recording medium according...
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...
7314907 Purified polymeric materials and methods of purifying polymeric materials  
A method is disclosed to purify a polymeric material by filtering a melt comprising poly(arylene ether) and poly(alkenyl aromatic) through a melt filtration system. The method provides a filtered...
7313056 Magneto-optical recording medium and magneto-optical recording device  
The magneto-optical recording medium is comprised of a phase pit substrate/dielectric layer/recording layers/dielectric layer/reflection layer and a ROM and RAM can be simultaneously regenerated....
7307942 Information recording medium, information reproducing apparatus, information recording apparatus, and information recording/reproducing apparatus  
The depth of pits is determined by a trade-off between the level of a push-pull signal used for servo application by a push-pull method and the level of an RF signal as a reproduced signal of...
7304924 Optical disk device capable of demodulation and verification of address data from land and groove track address systems  
A high-definition optical disk device for recording and reproducing data with respect to lands and grooves of an optical disk. The grooves and the lands of the optical disk are wobbled, and address...
7298690 Optical recording medium, master for optical recording medium manufacture, recording and reproducing apparatus, and recording and reproducing method  
To make a magneto-optical disk to have higher track density and enable stable tracking servo to be performed thereon. On an magneto-optical disk, a first groove Gv 1 , a second groove Gv 2 , and a...
7294446 Digital analog recording using near field optical imaging  
A data storage device and method of making the storage device wherein a digital and analog image may be stored thereon. The storage device includes a photosensitive layer capable of retaining an...
7283459 Optical disk and optical disk apparatus  
There is provided an optical disk which adopts a PRML (Partial Response and Maximum Likelihood) method for reproduction of recorded information and whose shortest pit has a conical shape without a...
7283458 Optical information recording medium, and method and device for optical information recording/reproduction using same  
A recording layer ( 2 ) and a light-transmitting layer ( 3 ) are provided on a substrate ( 1 ) having a guide groove for tracking a light beam projected in a spot for information...
7283457 Optical recording medium and method of evaluating optical recording medium  
A conventional mechanical precision measuring device is used effectively in the measurement of the eccentricity of a high density optical disc. A DVR optical disc 2 comprises a pattern 4 of...
7283456 Reproduction-only recording medium  
In a read-in area on the ROM disc, there are two control-data areas, and the Disc Information recorded in each control-data area comprises a error correction code (ECC (Error Correcting Code) block...
7280462 Method and apparatus for recording/reproducing optical information  
A substrate ( 1 ) having a guide groove for tracking with spot irradiation light beam for recording/reproduction of information is provided with a recording layer ( 2 ) and a light transmitting...
7280461 Optical recording/reproducing medium, stamper for manufacturing optical recording/reproducing medium, and optical recording/reproducing apparatus  
An optical recording and reproduction medium in which pits corresponding to recording information are formed along a recording track, wherein auxiliary pits are formed in at least a portion of the...
7277379 Information recording carrier  
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...
7277376 Optical recording method  
An optical recording method to be used for recording at a high data transfer rate length-modulated marks on a recording medium by applying a recording laser beam locally to the recording medium....
7274627 Record carrier and apparatus for scanning the record carrier  
A record carrier has a servo track indicating an information track intended for recording information blocks, which servo track has a variation of a physical parameter, referred to as wobble. The...
7272106 Optical information storage medium  
An optical information storage medium includes a lead-in area, a lead-out area, and a user data area between the lead-in and lead-out areas and in which user data is recorded. Pits are formed in...
7266076 Automatic detecting device for land pre-pits signals  
An automatic detecting device of land pre-pits signal is disclosed. The device adjusts gain of push-pull signals to raise the signal to noise ratio of the land pre-pits signal to the wobble signal....
7263057 On-groove recordation type optical disc  
Hardness of a resin substrate of an optical disc is selected to be greater than hardness of a cover layer of the optical disc, at least when information is recorded on the optical disc. A laser...
7263043 Optical disk apparatus for optimizing laser power during recording  
An optical disk drive for optimizing laser power to be used at the time of recording operation. In a DVD-R drive and a DVD-RW drive, a controller performs OPC to set recording power and records RMD...
7260052 Information recording medium  
A groove track and a land track are alternately and spirally formed on an information recording medium. On the land track neighboring the groove track, pre-information indicating position...
7257076 Magneto-optical recording medium  
A magneto-optical recording medium in which the inside of grooves formed along recording tracks is a signal recording area in groove recording, and the domain wall displacement detection method is...
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