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1. (WO1998050915) OPTICAL RECORDING MEDIUM AND METHOD OF INFORMATION RECORDING/REPRODUCTION USING THE SAME
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1998/050915 International Application No.: PCT/JP1998/002021
Publication Date: 12.11.1998 International Filing Date: 07.05.1998
Chapter 2 Demand Filed: 26.11.1998
IPC:
G11B 7/0045 (2006.01) ,G11B 7/005 (2006.01) ,G11B 7/24 (2006.01) ,G11B 7/244 (2006.01) ,G11B 7/247 (2006.01) ,G11B 7/248 (2006.01)
[IPC code unknown for G11B 7/045][IPC code unknown for G11B 7/05]
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7
Recording 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
24
Record carriers characterised by shape, structure or physical properties, or by the selection of the material 
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7
Recording 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
24
Record carriers characterised by shape, structure or physical properties, or by the selection of the material 
241
Record carriers characterised by the selection of the material
242
of recording layers
244
comprising organic materials only
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7
Recording 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
24
Record carriers characterised by shape, structure or physical properties, or by the selection of the material 
241
Record carriers characterised by the selection of the material
242
of recording layers
244
comprising organic materials only
246
containing dyes
247
methine or polymethine dyes
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7
Recording 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
24
Record carriers characterised by shape, structure or physical properties, or by the selection of the material 
241
Record carriers characterised by the selection of the material
242
of recording layers
244
comprising organic materials only
246
containing dyes
248
porphines; azaporphines, e.g. phthalocyanines
Applicants: TAKASE, Yoshiyuki[JP/JP]; JP (UsOnly)
TOSAKI, Yoshihiro[JP/JP]; JP (UsOnly)
TAKAHASHI, Katsuyuki[JP/JP]; JP (UsOnly)
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.[JP/JP]; 1006, Oaza Kadoma Kadoma-shi Osaka 571-8501, JP (AllExceptUS)
Inventors: TAKASE, Yoshiyuki; JP
TOSAKI, Yoshihiro; JP
TAKAHASHI, Katsuyuki; JP
Agent: AOYAMA, Tamotsu ; Aoyama & Partners IMP Building 3-7, Shiromi 1-chome Chuo-ku, Osaka-shi Osaka 540-0001, JP
Priority Data:
9/11782508.05.1997JP
Title (EN) OPTICAL RECORDING MEDIUM AND METHOD OF INFORMATION RECORDING/REPRODUCTION USING THE SAME
(FR) SUPPORT D'ENREGISTREMENT OPTIQUE ET PROCEDE D'ENREGISTREMENT / REPRODUCTION D'INFORMATIONS L'UTILISANT
Abstract:
(EN) An optical recording medium comprising at least a recording layer (2), a recording auxiliary layer (5), a reflecting layer (3) and a protective layer (4) provided on a transparent substrate (1) in this order. The recording layer and the recording auxiliary layer are mainly made of an organic dye. Recording and/or reproduction can be performed with a laser beam having a wavelength $g(l)1 or with a laser beam having a wavelength of $g(l)2 shorter than the wavelength $g(l)1. The recording layer has a spectroscopic absorbance of 5 to 35 % for the wavelength $g(l)1 and 15 % or more for the wavelength $g(l)2. The recording auxiliary layer has a peak of the spectroscopic reflectance in the vicinity of the wavelength $g(l)2.
(FR) L'invention concerne un support d'enregistrement optique comprenant au moins une couche d'enregistrement (2), une couche auxiliaire d'enregistrement (5), une couche réfléchissante (3) et une couche protectrice (4) disposées sur un substrat transparent (1) dans cet ordre. La couche d'enregistrement et la couche d'enregistrement auxiliaire sont essentiellement constituées d'un colorant organique. On peut effectuer un enregistrement et/ou une reproduction au moyen d'un faisceau laser ayant une longueur d'onde $g(l)1 ou au moyen d'un faisceau laser ayant une longueur d'onde $g(l)2 plus courte que la longueur d'onde $g(l)1. La couche d'enregistrement présente une absorbance spectroscopique comprise entre 5 et 35 % pour la longueur d'onde $g(l)1 et de 15 % ou davantage pour la longueur d'onde $g(l)2. La couche d'enregistrement auxiliaire présente une crête de réflectance spectroscopique proche de la longueur d'onde $g(l)2.
front page image
Designated States: CN, JP, KR, US
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)