RF tag having strain relieved stiff substrate and hydrostatic pr

Details RF tag having strain relieved stiff substrate and hydrostatic pr RF tag having strain relieved stiff substrate and hydrostatic pr

1998-10-15

2000-09-05

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

3405721, 3405725, 3405727, G08B 13187

Patent

active

061149624

ABSTRACT:
An RF tag for inclusion in a smart label comprises a stiff substrate sized to be received in the smart label, an antenna carried by the substrate and an integrated circuit having a memory circuit carried by the substrate and coupled to the antenna by wire bonding. The substrate may be strain relieved, for example, by forming a pair of generally opposed serpentine edges on the substrate, or forming a plurality of grooves in at least one surface of the substrate. A smart label comprises the RF tag between a face sheet and an adhesive. A release liner may cover the adhesive. A compressably deformable material having a low viscoelastic modulus is received between the first surface of the substrate and the face sheet partially surrounding the circuit structure and wire bonds to hydrostatically protect against damage. A film layer with a blister may envelop the low viscoelastic modulus material.

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patent: 6031459 (2000-02-01), Lake

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