2009

Through-Metal RFID Tags Resist Harsh Environments and Deter Counterfeiting

These patented 125-kHz RFID tags and readers enable tag information to be read and written through metal so that tags can be hermetically sealed inside metal parts such as surgical instruments, construction forms, weapons, and similar devices that must withstand harsh environments. MBBS tags can resist high temperatures and pressures (240°C, 2000 bar), acids, chemicals, and similar conditions.

At the heart of each tag is an integrated circuit that can store up to 2 Kbits of rewritable data. The tags can be inserted directly into parts and other devices to build a permanent and robust tagging system. Tags have also been designed as anti-counterfeiting IDs, where the tag self-destructs if the factory- sealed container has been opened.

The tags employ a flat air coil that uses no ferrite, as an antenna. MBBS reader technology offers an emitter and receiver that have been optimized for operation with metal tags.

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