Optically readable information disc

Details Optically readable information disc Optically readable information disc

G - Physics

11

B

352/32.4

G11B 7/24 (2006.01) G03F 7/00 (2006.01) G11B 7/26 (2006.01) G11B 23/00 (2006.01)

Patent

CA 1141462

ABSTRACT: An information disc in which information can be stored, which information can be read optically. The in- formation disc comprises a transparent substrate 6 which is preferably manufactured from a synthetic resin, for example poly (methyl methacrylate), bearing a radiation- cured lacquer layer 7 comprising an information track 8 having a relief structure of information aread 9, 10. The lacquer layer 7 used comprises a radiation-cross linkable protic compound which after curing is aprotic. The lacquer layer preferably comprises a polythiol com- pound as well as a polyene compound in an equivalent ratio of 1:1.

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