Disk-like multilayer information recording medium and...

G - Physics – 11 – B

Patent

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Details

G11B 7/26 (2006.01) B29C 59/02 (2006.01) G11B 7/24 (2006.01) B29C 35/08 (2006.01) B29C 59/04 (2006.01)

Patent

CA 2337877

The present invention relates to a multi-layered disc-shaped information recording medium having a plurality of signal recording layers each carrying information signals. In preparing the recording medium, a first substrate obtained on punching a sheet obtained in turn by having a signal recording pattern transcribed on it from a first stamper and by forming a semi-transparent film on a signal surface is bonded to a second substrate obtained on injection molding a synthetic resin material. The second substrate is prepared by having transcribed to it a signal recording pattern formed on a second stamper provided on an injection molding device. A reflective film is formed on a signal surface having the transcribed second substrate. The first and second substrates are bonded together on their signal recording layers by a transparent adherent layer.

L'invention concerne un support d'enregistrement d'informations, à structure multicouche et du type disque, possédant plusieurs couches d'enregistrement de signaux conçues pour enregistrer des signaux d'information. Ledit support est obtenu par collage d'un premier substrat sur lequel les motifs d'enregistrement de signaux formés sur une première matrice de pressage sont transférés et qui est produit par pressage d'une feuille sur la surface à signaux à partir de laquelle un film semi-transparent est formé, et d'un deuxième substrat formé par moulage par injection d'un matériau de résine synthétique, sur lequel des motifs d'enregistrement de signaux formés sur une deuxième matrice de pressage de machine de moulage par injection sont transférés, et constitué d'un film de réflexion sur une surface à signaux de celui-ci sur laquelle les motifs d'enregistrement de signaux sont transférés.

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