G - Physics – 11 – B
Patent
G - Physics
11
B
G11B 7/24 (2006.01) G11B 7/007 (2006.01) G11B 7/013 (2006.01) G11B 7/258 (2006.01) G11B 7/26 (2006.01)
Patent
CA 2335844
There are provided an optical disk and a manufacturing method thereof which can increase its recording capacity, e.g. to 15 GB or higher. This optical disk may comprises an optical disk substrate 3 in which successive pits corresponding to a recording signal are formed, a reflection film 4 formed in this optical disk substrate 3 on its surface that successive pits 2 are formed and a light transmissive layer 5 formed on this reflection film 4. When a recorded signal is read out, i.e. reproduced from the optical disk, a signal recorded as successive pits is read out by irradiating of short-wavelength laser light having a wavelength of 350 nm to 420 nm from the side of the light transmissive layer 5 formed on the surface of the optical disk. Moreover, in this optical disk, when the successive pits are observed from the side of the light transmissive layer irradiated by reproducing laser light, the successive pits contain pits having length and width ranging from 80 nm to 250 nm, and the reflection film has the film thickness selected to be 20 nm or less, e.g. greater than 8 nm.
L'invention concerne un disque optique haute capacité, par exemple un disque d'une capacité égale ou supérieure à 15 GB. Ce disque optique comprend un substrat (3) sur lequel sont formées des suites de dépressions (2) formant des lignes, correspondant aux signaux d'enregistrement, un revêtement (4) réfléchissant recouvrant la surface du substrat (3) sur lequel sont formés les dépressions (2), et une couche (5) transparente formée sur le revêtement (4) réfléchissant. La lecture ou la reproduction est effectuée au moyen d'un faisceau laser d'une longueur d'onde de 350-420 nm qui traverse la couche (5) transparente de la surface afin de lire les signaux enregistrés sous forme de lignes de dépressions. Les dépressions mesurent de 80 à 250 nm en longueur et en largeur vues depuis le côté à couche transparente sur lequel arrive le faisceau laser de reproduction. L'épaisseur du revêtement réfléchissant est inférieure à 20 nm, et peut mesurer par exemple 8 nm ou davantage.
Furuki Motohiro
Takeda Minoru
Gowling Lafleur Henderson Llp
Sony Corporation
LandOfFree
Optical disk and method of manufacture thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical disk and method of manufacture thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disk and method of manufacture thereof will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1482282