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1. WO2010050506 - OPTICAL INFORMATION RECORDING MEDIUM AND OPTICAL INFORMATION RECORDING MEDIUM DRIVE DEVICE

Publication Number WO/2010/050506
Publication Date 06.05.2010
International Application No. PCT/JP2009/068499
International Filing Date 28.10.2009
IPC
G11B 7/24 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
24Record carriers characterised by shape, structure or physical properties, or by the selection of the material 
G11B 7/005 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
004Recording, reproducing or erasing methods; Read, write or erase circuits therefor
005Reproducing
G11B 7/125 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
125Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
G11B 7/243 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
24Record carriers characterised by shape, structure or physical properties, or by the selection of the material 
241Record carriers characterised by the selection of the material
242of recording layers
243comprising inorganic materials only, e.g. ablative layers
CPC
G11B 2007/24312
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation ; by modifying optical properties or the physical structure; , reproducing using an optical beam at lower power ; by sensing optical properties; Record carriers therefor
24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
241characterised by the selection of the material
242of recording layers
243comprising inorganic materials only, e.g. ablative layers
24302Metals or metalloids
24312group 14 elements (e.g. Si, Ge, Sn)
G11B 2007/24314
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation ; by modifying optical properties or the physical structure; , reproducing using an optical beam at lower power ; by sensing optical properties; Record carriers therefor
24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
241characterised by the selection of the material
242of recording layers
243comprising inorganic materials only, e.g. ablative layers
24302Metals or metalloids
24314group 15 elements (e.g. Sb, Bi)
G11B 2007/24316
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation ; by modifying optical properties or the physical structure; , reproducing using an optical beam at lower power ; by sensing optical properties; Record carriers therefor
24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
241characterised by the selection of the material
242of recording layers
243comprising inorganic materials only, e.g. ablative layers
24302Metals or metalloids
24316group 16 elements (i.e. chalcogenides, Se, Te)
G11B 2007/25706
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation ; by modifying optical properties or the physical structure; , reproducing using an optical beam at lower power ; by sensing optical properties; Record carriers therefor
24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
241characterised by the selection of the material
252of layers other than recording layers
257of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
25705consisting essentially of inorganic materials
25706containing transition metal elements (Zn, Fe, Co, Ni, Pt)
G11B 2007/25715
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation ; by modifying optical properties or the physical structure; , reproducing using an optical beam at lower power ; by sensing optical properties; Record carriers therefor
24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
241characterised by the selection of the material
252of layers other than recording layers
257of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
25705consisting essentially of inorganic materials
25715containing oxygen
G11B 7/24038
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation ; by modifying optical properties or the physical structure; , reproducing using an optical beam at lower power ; by sensing optical properties; Record carriers therefor
24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
2403Layers; Shape, structure or physical properties thereof
24035Recording layers
24038Multiple laminated recording layers
Applicants
  • シャープ株式会社 SHARP KABUSHIKI KAISHA [JP]/[JP] (AllExceptUS)
  • 田島 秀春 TAJIMA, Hideharu (UsOnly)
  • 前田 茂己 MAEDA, Shigemi (UsOnly)
  • 原田 康弘 HARADA, Yasuhiro (UsOnly)
  • 林 哲也 HAYASHI, Tetsuya (UsOnly)
  • 栄藤 淳 ETOH, Atsushi (UsOnly)
  • 山本 真樹 YAMAMOTO, Masaki (UsOnly)
Inventors
  • 田島 秀春 TAJIMA, Hideharu
  • 前田 茂己 MAEDA, Shigemi
  • 原田 康弘 HARADA, Yasuhiro
  • 林 哲也 HAYASHI, Tetsuya
  • 栄藤 淳 ETOH, Atsushi
  • 山本 真樹 YAMAMOTO, Masaki
Agents
  • 特許業務法人原謙三国際特許事務所 HARAKENZO WORLD PATENT & TRADEMARK
Priority Data
2008-28249331.10.2008JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) OPTICAL INFORMATION RECORDING MEDIUM AND OPTICAL INFORMATION RECORDING MEDIUM DRIVE DEVICE
(FR) SUPPORT D'ENREGISTREMENT D'INFORMATIONS OPTIQUE ET DISPOSITIF DE LECTURE DE SUPPORT D'ENREGISTREMENT D'INFORMATIONS OPTIQUE
(JA) 光情報記録媒体及び光情報記録媒体駆動装置
Abstract
(EN)
Disclosed is an optical information recording medium which has a structure whereby a light-transmitting layer (10A), a first information recording layer (20), an intermediate layer (30), a third information recording layer (60), an intermediate layer (30), a second information recording layer (40), and a substrate (50) are stacked in this order from the incident surface of reproduced light. The first information recording layer (20) is translucent, the reflectance for the reproduced light wavelength of the first information recording layer (20) is greater than 0.4% and not greater than 2.2%, and when the thickness of the light-transmitting layer (10A) is t and the reflectance for the reproduced light wavelength of the first information recording layer (20) is R2, the value of the reflectance R1 for the reproduced light wavelength on the surface of the light-transmitting layer (10A) is set such that equation 1 is true.Thus, reproduction is possible even with a drive device compatible with an old standard optical information recording medium with few information recording layers, and the recording capacity of the old standard optical information recording medium can be improved by adding a ROM layer or an R layer.
(FR)
L'invention porte sur un support d'enregistrement d'informations optique qui présente une structure dans laquelle une couche transmettant la lumière (10A), une première couche d'enregistrement d'informations (20), une couche intermédiaire (30), une troisième couche d'enregistrement d'informations (60), une couche intermédiaire (30), une deuxième couche d'enregistrement d'informations (40) et un substrat (50) sont empilés, dans cet ordre, à partir de la surface d'incidence de lumière de reproduction. La première couche d'enregistrement d'informations (20) est translucide, la réflectance pour la longueur d'onde de la lumière de reproduction de la première couche d'enregistrement d'informations (20) est supérieure à 0,4 % et non supérieure à 2,2 % et, lorsque l'épaisseur de la couche transmettant la lumière (10A) est t et que la réflectance pour la longueur d'onde de la lumière de reproduction de la première couche d'enregistrement d'informations (20) est R2, la valeur de la réflectance R1 pour la longueur d'onde de la lumière de reproduction sur la surface de la couche transmettant la lumière (10A) est telle que l'équation 1 est vraie. (1) Ainsi, une reproduction est possible, même avec un dispositif de lecture compatible avec un ancien support d'enregistrement d'informations optique standard comportant peu de couches d'enregistrement d'informations, et la capacité d'enregistrement de l’ancien support d'enregistrement d'informations optique standard peut être améliorée par l'addition d'une couche ROM ou d'une couche R.
(JA)
 再生光の入射面側から順に、透光層(10A)、第1情報記録層(20)、中間層(30)、第3情報記録層(60)、中間層(30)、第2情報記録層(40)及び基板(50)が積層された構造となっており、第1情報記録層(20)は、透光性を有し、第1情報記録層(20)の再生光波長における反射率の値は、0.4%より大きく2.2%以下であり、透光層(10A)の表面の再生光波長における反射率Rは、透光層(10A)の厚さをtとし、第1情報記録層20の再生光波長における反射率をRとした場合に、【数1】 が成り立つような値に設定される。これにより、情報記録層数が少ない旧規格の光情報記録媒体に対応している駆動装置でも再生可能であり、旧規格の光情報記録媒体にROM層又はR層を追加することにより記録容量を向上させることが可能となる。
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