Manufacture of optical data storage disc

G - Physics – 11 – B

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Details

G11B 7/26 (2006.01) B29C 59/02 (2006.01) B29D 17/00 (2006.01) B30B 15/06 (2006.01) G03H 1/02 (2006.01) G11B 23/38 (2006.01) G11B 7/0065 (2006.01)

Patent

CA 2244129

A method and apparatus forming a micro-relief pattern on a surface of an optical disc, which micro-relief pattern may form a holographic image in which a shim bearing a micro-relief pattern is pressed onto the surface of the disc and the apparatus used ensures that a greater force is applied to the periphery of the disc and the remainder of the surface on which it is desired to form the micro-relief pattern, such method and apparatus enables a satisfactory relief pattern to be formed over a substantial area of the surface of the disc.

La présente invention a pour objet un procédé et un appareil permettant de former un motif à relief microscopique sur la face d'un disque optique, ledit motif pouvant être constitué d'une image holographique. Ce procédé consiste à presser sur la face du disque un applicateur portant un motif à relief microscopique et l'appareil utilisé permet d'appliquer sur la périphérie du disque une force plus grande que sur le reste de la face du disque, reste correspondant à la zone sur laquelle le motif à relief microscopique doit être appliqué. Ce procédé et cet appareil permettent de former un motif à relief satisfaisant sur une partie importante de la surface du disque.

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