Optical disk, method for producing the same, and apparatus...

Details Optical disk, method for producing the same, and apparatus... Optical disk, method for producing the same, and apparatus...

2006-05-16

2006-05-16

Letscher, George (Department: 2653)

Dynamic optical information storage or retrieval

Optical storage medium structure

Reexamination Certificate

active

07047545

ABSTRACT:
An optical disk of the present invention includes a first substrate having a signal area on a principal plane and a central hole, and a second substrate that is transparent and attached to the first substrate. The second substrate is thinner than the first substrate, and has a central hole whose diameter is larger than that of the first substrate. The first substrate and the second substrate are attached to each other with radiation curable resin (adhesive member) disposed therebetween so as to extend at least from an inner peripheral edge of the second substrate to an outer peripheral edge thereof.

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