Patent ID: 8830806
Filing Date: 2014-09-09
Classification: G11B

Abstract:
1. An optical disc used for data storage comprising: a disc body having two opposed surfaces; a standard data storage area disposed on at least one of said surfaces and being readable by an optical data handling device; and a theft control area formed on one of said surfaces, said theft control area being much smaller than said standard data storage area, said theft control area including: an RFID formed integrally on said one surface of said disk body as part of said theft control area, said RFID including an element having a first state and being sensitive to electromagnetic radiation in a predetermined frequency range to change to a second state, said RFID being operational and generating an output signal in response to a query only if said element is one of said first and second states and, said RFID being disabled and being unable to generate said output signal if said element is in said other of said first and second states, said element being configured to be permanently set into one of said respective states after a single application of said electromagnetic radiation, wherein said first element disables said RFID non-operational in said first state, wherein said RFID generates said output signal only when said element is in said first state and is permanently disabled from generating said output signal once said element is switched to said second state.