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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Yamada; Noboru
Address:
Hirakata, JP
No. of patents:
85
Patents:


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Patent Number Title Of Patent Date Issued
7967956 Information recording medium and method for producing the same June 28, 2011
The information recording medium of the present invention comprises at least one of the following oxide-based material layers: (I) an oxide-based material layer containing Zr, at least one element selected from the group GL1 consisting of La, Ga and In, and oxygen (O); (II) an oxide-
7858290 Information recording medium and method for manufacturing the same December 28, 2010
An information recording medium includes a substrate and an information layer formed on the substrate. The information layer includes a recording layer whose phase can be changed between a crystalline phase and an amorphous phase by irradiation with a laser beam or application of ele
7709073 Information recording medium May 4, 2010
In an information recording medium on and from which information is recorded and reproduced by applying light or electric energy, a recording layer which generates reversible phase change is formed so as to include a material containing Ge, Bi, Te and an element "M" which material is
7608385 Information recording medium and method for producing the same October 27, 2009
The information recording medium of the present invention comprises at least one of the following oxide-based material layers: (I) an oxide-based material layer containing Zr, at least one element selected from the group GL1 consisting of La, Ga and In, and oxygen (O); (II) an oxide-
7540006 Optical information recording medium and manufacture method thereof May 26, 2009
An optical information recording medium includes one or more information layers including a recording layer for recording/reproducing an information signal by irradiation with a laser light, and a seperating layer or a protective substate on which a first information layer of the inf
7449225 Information recording medium and method for manufacturing the same November 11, 2008
An information recording medium of the present invention includes a substrate and an information layer arranged on the substrate. The information layer includes a recording layer that is changed in phase reversibly between a crystalline phase and an amorphous phase by at least one of
7431973 Optical information recording medium, and manufacturing method, recording method, and recording October 7, 2008
A recording medium has at least a recording layer on a transparent substrate. The recording layer has at least a first phase-changeable film and a second phase-changeable film in that order, starting on the side closest to the transparent substrate. The first phase-changeable film and
7423957 Optical information recording medium and method of manufacturing thereof, manufacturing apparatu September 9, 2008
The present invention provides an optical information recording medium of excellent signal quality in high density recording onto a semitransparent information layer, its manufacturing method and a manufacturing apparatus. The optical information recording medium of the present inven
7407697 Information recording medium and method for manufacturing the same August 5, 2008
An information recording medium is provided that has high recording sensitivity for recording information and superior repeated rewriting performance. The information recording medium has at least a recording layer that is changeable between a crystalline phase and an amorphous phase
7394090 Non-volatile memory and the fabrication method July 1, 2008
A non-volatile memory comprising: a first substrate (100) and a second substrate (110), the first substrate (100) having a plurality of switching elements (4) arranged in matrix, and a plurality of first electrodes (18) connected to the switching element (4), the second substrate (11
7390381 Information recording medium and method of manufacturing the same June 24, 2008
An information recording medium that is excellent in repeated-rewriting performance and is deteriorated less in crystallization sensitivity with time is provided, with respect to which high density recording can be carried out. A method of manufacturing the same also is provided. The
7304930 Optical information recording medium and recording method using the same December 4, 2007
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 second substrate 12, and the information layer 20 includes a r
7255906 Information recording medium and method for producing the same August 14, 2007
In an information recording medium of the present invention, a recording layer and first and second dielectric layers are formed on a surface of a substrate. In the recording layer, at least one of recording and reproduction is caused by irradiation of light or application of electric
7232703 Non-volatile memory and the fabrication method June 19, 2007
A non-volatile memory comprising: a first substrate (100) and a second substrate (110), the first substrate (100) having a plurality of switching elements (4) arranged in matrix, and a plurality of first electrodes (18) connected to the switching element (4), the second substrate (11
7193947 Optical information recording method, optical information recording device and optical informati March 20, 2007
An edge position of a recording pulse is corrected according to multi-valued information for determining the width of a mark in an edge position correction circuit, thereby it is possible to form a mark edge in a correct position when a mark with any width is to be corrected to enabl
7169455 Optical information recording medium and method for manufacturing the same January 30, 2007
An optical information recording medium on which information can be recorded and reproduced by using a laser beam is provided. The medium includes a substrate with a guide groove and a multilayered metal film including at least a first metal layer, a barrier layer and a second metal
7074471 Optical information recording medium, method for producing the medium, and method and apparatus July 11, 2006
An optical information recording medium of the present invention includes a transparent substrate and a multi-layered film provided on the transparent substrate. The multi-layered film includes at least a recording layer that is changed between two or more different states capable of
7063876 Information recording medium and method for manufacturing the same June 20, 2006
A multilayer information recording medium has both good reproducing performance and good recording and rewriting capabilities, as well as good repeated rewriting capabilities even after being archived for a long period of time. The information recording medium has at least a first re
7057252 Optical information recording medium June 6, 2006
The optical information recording medium of the present invention includes an information layer provided on a substrate. The information layer includes: a recording layer with respect to which information can be recorded and reproduced through irradiation with a laser beam having a p
7035190 Method of recording/reproducing information on a recording medium with plural phase change recor April 25, 2006
An information recording medium includes a first information layer and a second information layer. The first information layer includes a first recording layer in which a reversible phase change is caused between a crystalline phase and an amorphous phase by irradiation of a laser beam
7014904 Optical information recording medium and method for manufacturing the medium March 21, 2006
An optical information recording medium of the invention has at least two information layers. A first information layer (100) disposed at the front side (viewed from a laser incident side) includes at least a reflection layer (3), a recording layer (6) disposed at the laser incident side
7008681 Optical information recording medium and manufacturing method and recording/reproducing method f March 7, 2006
An optical information recording medium of the present invention includes at least one information layer. The information layer includes a first protective film, a first interface film, a recording film having the optical characteristics that are changed reversibly by laser beam irra
7002896 Information recording medium and method for producing the same, and method for recording/reprodu February 21, 2006
An information recording medium includes a first information layer and a second information layer. The first information layer includes a first recording layer in which a reversible phase change is caused between a crystalline phase and an amorphous phase by irradiation of a laser beam
6893698 Optical information recording medium, optical measuring method and optical information recording May 17, 2005
An optical information recording medium having two or more information layers, wherein the irradiation of either the information layer with a laser beam converging thereon causes information signals to be recorded or reproduced; the nearer positioned information layer than the farthest
6890613 Information recording medium and method for producing the same, and method for recording/reprodu May 10, 2005
An information recording medium includes a first information layer and a second information layer. The first information layer includes a first recording layer in which a reversible phase change is caused between a crystalline phase and an amorphous phase by irradiation of a laser beam o
6881466 Information recording medium and method for producing the same April 19, 2005
An information recording medium ensures high reliability and favorable overwrite cycle-ability even when an interface layer is not provided between a recording layer and a dielectric layer. The recording layer and the dielectric layers are formed on the surface of the substrate. In the
6858278 Information recording medium and method for producing the same February 22, 2005
An information recording medium which ensures high reliability and favorable overwrite cycle-ability is provided, even when an interface layer is not provided between a recording layer and a dielectric layer. The recording layer 4 and the dielectric layers 2 and 6 are formed on the s
6841217 Optical information recording medium and method for manufacturing the same January 11, 2005
An optical information recording medium according to the present invention includes at least one information layer in which a first dielectric film that contains Cr, O and at least one element (M1) selected from Zr and Hf, a recording film that is provided on the first dielectric film an
6794006 Information recording medium and method for producing the same, and method for recording/reprodu September 21, 2004
An information recording medium includes a first information layer and a second information layer. The first information layer includes a first recording layer in which a reversible phase change is caused between a crystalline phase and an amorphous phase by irradiation of a laser beam o
6764736 Optical information recording medium and recording method using the same July 20, 2004
An optical information recording medium of the present invention includes a first substrate, a second substrate placed in parallel with the first substrate, and an information layer placed between the first substrate and the second substrate, wherein the information layer includes a reco
6761950 Information recording medium and method for producing the same July 13, 2004
An information recording medium which ensures high reliability and favorable overwrite cyclability is provided, even when an interface layer is not provided between a recording layer and a dielectric layer. The recording layer 4 and the dielectric layers 2 and 6 are formed on the sur
6744724 Recording and reproducing method for optical information recording medium and optical informatio June 1, 2004
Tracking control is carried out by a push-pull method or by mechanical feed at the time of recording signals, and tracking control is carried out by a phase difference tracking method at the time of reproduction. Thus, a phase change type optical disk which enables phase difference repro
6743496 Information recording medium and method for producing the same, and method for recording/reprodu June 1, 2004
An information recording medium includes a first information layer and a second information layer. The first information layer includes a first recording layer in which a reversible phase change is caused between a crystalline phase and an amorphous phase by irradiation of a laser beam o
6663934 Optical information recording medium December 16, 2003
An optical information recording medium comprises a substrate and a multilayered film formed on the substrate, the multilayered film comprising a first information layer, a separating layer, and a second information layer in this order from the side of the substrate. Each of the firs
6607869 Optical information recording medium and method of manufacturing the same August 19, 2003
An optical information recording medium having a recording layer for inducing a reversible phase change by irradiation with energy beam. The recording layer contains Te, Ge, Sb, and N, and the concentration of the N being contained is in a range of about 0.1% by atom to about 10% by atom
6587420 Recording and reproducing method for optical information recording medium and optical informatio July 1, 2003
Tracking control is carried out by a push-pull method or by mechanical feed at the time of recording signals, and tracking control is carried out by a phase difference tracking method at the time of reproduction. Thus, a phase change type optical disk which enables phase difference repro
6456584 Optical information recording medium comprising a first layer having a phase that is reversibly September 24, 2002
A multi-layer optical information recording medium has a first information layer located at the incident side for a laser beam and another information layer at the back thereof. Thus, it has a large capacity. A relationship that R1a<R1c and R2a<R2c holds for the reflectances R1a
6268107 Reversible optical information-recording medium July 31, 2001
Phase-change type, reversible optical information recording medium, being possible for recording, reproducing, erasing, and rewriting of information, by use of a laser beam. This invention, consists of recording thin film of ternary elements, for example, containing Ge, Te, Sb/or Bi or
6153063 Optical information recording medium, producing method thereof and method of recording/erasing/r November 28, 2000
In a phase-change recording medium, a recording medium is provided with a barrier layer including Ge--N, Ge--N--O between a recording layer and a dielectric protective layer in order to prevent a chemical reaction and an atom diffusion between the recording layer and the dielectric prote
6146734 Optical recording disk and method for manufacturing the same November 14, 2000
The present invention is to provide a method for manufacturing the PCE optical information recording disk under control of not only the crystallization velocity but also the complex index of refraction and thus the reflectance on the disk surface.The PCE optical information recording dis
6033535 Optical information recording disk and method for manufacturing the same March 7, 2000
The present invention is to provide a method for manufacturing the PCE optical information recording disk under control of not only the crystallization velocity but also the complex index of refraction and thus the reflectance on the disk surface.The PCE optical information recording dis
5956308 Data storage apparatus September 21, 1999
A track on the disk is divided into plural concentric zones on the radial position thereof. During recording, the angular velocity varies according to the zones accessed for recording, and the disk is driven at a rotational velocity whereby the angular velocity is constant within any
5811217 Optical information recording medium and optical information recording/reproducing method September 22, 1998
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 absorbing at least laser light so as to record information by partially varying the record
5768233 Data storage apparatus for recording and reproducing information on a recording medium by rotati June 16, 1998
A track on the disk is divided into plural concentric zones on the radial position thereof. During recording, the angular velocity varies according to the zones accessed for recording, and the disk is driven at a rotational velocity whereby the angular velocity is constant within any
5750228 Optical information storage medium May 12, 1998
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 first dielectric layer, a recording layer which shows reversible phase change between an amor
5729513 Data storage apparatus for recording and reproducing information on a recording medium by rotati March 17, 1998
A track on the disk is divided into plural concentric zones on the radial position thereof. During recording, the angular velocity varies according to the zones accessed for recording, and the disk is driven at a rotational velocity whereby the angular velocity is constant within any
5635267 Optical information recording medium of phase change type having variably grooved tracks dependi June 3, 1997
In an optical information recording medium such that a recording layer undergoing an optically detectable phase change by absorbing a laser beam is formed on a transparent substrate having geometrically concavo-convex groove tracks concentrically or spirally formed on its surface, the sh
5545454 Optical information recording medium and method of designing its structure August 13, 1996
Phase-change-type optical recording medium comprises a first dielectric layer, a recording layer made of a phase change material, a second dielectric layer and a reflecting layer wherein the thicknesses of the first and second dielectric layers are determined for a given thickness of
5527661 Optical information recording medium June 18, 1996
An optical recording medium according to the present invention includes a substrate, and a recording film formed on the substrate, when receiving a laser beam for recording, the recording film taking either a first structural state or a second structural state according to the intensity
5517485 Optical information recording medium having first and second tracks and apparatus for recording May 14, 1996
An optical information recording medium includes: a substrate including first tracks having a first face and second tracks having a second face, the first face and the second face being optically at different positions in a direction of an incident light beam; and a recording layer provi
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