Disc device having a magnetic layer overweighing the information signal pattern for electronic article surveillance
First Claim
Patent Images
1. A disc device comprising:
- a substrate formed of a light transmissive material and having an information signal pattern formed on a surface thereof;
a reflective magnetic material layer formed on the information signal pattern on the surface of said substrate; and
a semi-hard material layer formed on said magnetic material layer, said semi-hard material layer activating and deactivating the magnetic material layer to allow for detection and non-detection, respectively, of the disc device by an electronic article surveillance detection system.
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Abstract
A disc device includes a disc substrate having an information signal pattern formed on a surface thereof and a magnetic material layer formed on the information signal pattern which permits for detection of the device by an electronic article surveillance detection system.
32 Citations
5 Claims
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1. A disc device comprising:
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a substrate formed of a light transmissive material and having an information signal pattern formed on a surface thereof; a reflective magnetic material layer formed on the information signal pattern on the surface of said substrate; and a semi-hard material layer formed on said magnetic material layer, said semi-hard material layer activating and deactivating the magnetic material layer to allow for detection and non-detection, respectively, of the disc device by an electronic article surveillance detection system. - View Dependent Claims (2, 3, 4, 5)
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Specification