Patent ID: 7833603

Claim:
An optical disc comprising: an active disc on which information is recorded; and a dummy disc for protecting the active disc, wherein the active disc and the dummy disc are bonded to form a single body, and wherein the dummy disc comprises methylmethacrylate-acrylonitrile-butadiene-styrene copolymer (MABS) resin, wherein the methylmethacrylate-acrylonitrile-butadiene-styrene copolymer (MABS) resin comprises about 36 to about 47% by weight of methylmethacrylate, about 4 to about 7% by weight of acrylonitrile, about 10 to about 30% by weight of butadiene-styrene copolymer rubber, and about 30 to about 36% by weight of styrene.