Wireless communication device using voltage switchable dielectric material
A wireless communication device, such as an RFID tag, is provided material that is dielectric, unless a voltage is applied that exceeds the materials characteristic voltage level. In the presence of such voltage, the material becomes conductive. The integration of such material into the device may be mechanical and/or electrical.
1 . A wireless communication device comprising:
a plurality of electrical components;
a protective mechanism comprising a voltage switchable dielectric (VSD) material that is capable of switching from being insulative to carrying current generated from a transient voltage that exceeds a threshold voltage level;
wherein the mechanism is adapted to enable the VSD material to switch and carry current from the transient voltage such that the wireless communication device is not subjected to a minimum voltage level that would otherwise cause the wireless communication device to become inoperative.
2 . The device of claim 1 , wherein the VSD material is positioned to ground the plurality of electrical components when the voltage is encountered that exceeds the threshold voltage level.
3 . The device of claim 1 , further comprising:
a substrate on which the plurality of electrical elements is provided, the plurality of electrical components including one or more logic elements; and
wherein the VSD material is provided to ground the one or more logic elements.
4 - 5 . (canceled)
6 . The device of claim 1 , further comprising a package that encapsulates the plurality of electrical components, and wherein the VSD material is provided as part of the package.
7 . The device of claim 6 , wherein the VSD material is provided as at least one of (i) on a portion of the package, or (ii) an adhesive to bind one or more portions of the package or its components.
8 - 26 . (canceled)
27 . The device of claim 1 , wherein the VSD material comprises 30% to 80% insulator, 0.1% to 70% conductor, and 0% to 70% semiconductor.
28 . The device of claim 1 , wherein the VSD material comprises a polymer.
29 . The device of claim 1 , wherein the VSD material comprises a concentration of carbon nanotubes.
30 . The device of claim 1 , further comprising:
a substrate on which the plurality of electrical components are provided, the plurality of electrical components including an antenna and a processor; and
wherein the VSD material is provided as a layer to ground the antenna and the processor.