Information rercording media

Details Information rercording media Information rercording media

G - Physics

11

B

42/2, 352/32.4

G11B 7/24 (2006.01) G11B 7/253 (2006.01)

Patent

CA 2030899

ABSTRACT Improvement in an information recording medium comprising two transparent resin substrates combined with each other, at least one of which has a recording layer provided on the inner surface thereof two pieces of hubs mounted over the center hole of said disc substrates on both sides thereof, each hub having a insertion portion to be inserted into said center hole and a flange portion to cover a portion of said disc substrate in the vicinity of said center hole, wherein a notch is provided on the peripheral surface of each hubs, adhesive layers are formed at least in the notch between the inner peripheral surface of the center hole and the outer peripheral surface of the insertion portion of said hubs and between the hubs and a specific photo-curable composition may be used for the adhesive layer.

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