Wireless identification device, RFID device with push-on/push-off switch, method of manufacturing wireless identification device

• US 6,768,415 B1
• Filed: 10/03/1997
• Issued: 07/27/2004
• Est. Priority Date: 10/03/1997
• Status: Expired due to Fees

• Current Assignee: Round Rock Research LLC
• Original Assignee: Micron Technology, Inc.
• Inventors: Tuttle, Mark E.
• Primary Examiner(s): ZIMMERMAN, BRIAN A
• Application Number:
  US08/943,889
• Time in Patent Office: 2,489 Days
• Field of Search: 340/825.31, 340/825.49, 340/10.4, 340/10.41, 340/10.42, 340/572.3, 340/572.8, 340/693.5, 340/5.62, 200/512, 235/492, 156/233, 156/247
• US Class Current: 340/10.4
• CPC Class Codes: G06K 19/0716 at least one of the integrated circuit chips comprising a sensor or an interface to a sensor
• CPC Class Codes: G06K 19/0723 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
• CPC Class Codes: G06K 19/07345 by activating or deactivating at least a part of the circuit on the record carrier, e.g. ON/OFF switches
• CPC Class Codes: G06K 19/07749 the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
• CPC Class Codes: H01H 2231/05 Card, e.g. credit card

Abstract

A wireless identification device including a housing; circuitry in the housing configured to provide a signal to identify the device in response to an interrogation signal; and a selectively actuated switch supported by the housing and controlling whether the circuitry identifies the device. A method of manufacturing a wireless identification device, the method comprising configuring circuitry to provide a signal to identify the device in response to an interrogation signal; coupling the circuitry to, a push-on/push-off switch supported by the housing and controlling whether the circuitry provides the signal to identify the device; and encasing the circuitry in a housing such that the switch is actuable from outside the housing by touching a portion of the housing.

Claims

1. A radio frequency identification device comprising:

a housing;

a battery supported in the housing and having first and second terminals of opposite polarity;

transmitter circuitry in the housing configured to provide a modulated backscatter signal by reflecting or not reflecting a carrier signal provided by an interrogator to communicate with the interrogator, to identify the device in response to an interrogation signal by the interrogator;

receiver circuitry in the housing, coupled to the transmitter circuitry, and configured to receive the interrogation signal;

a push-on/push-off switch supported by the housing and controlling whether the circuitry provides the signal to identify the device by controlling whether or not the receiver is coupled to the battery, the switch including a first conductor formed of printed thick film and having a first end coupled to the first terminal of the battery and having a second end, a second conductor formed of printed thick film and having a first end coupled to the receiver and having a second end spaced apart from the second end of the first conductor, an insulating ring having a periphery circumscribing the second end of the first conductor and the second end of the second conductor, and a diaphragm having a periphery corresponding to the periphery of the insulating ring and having a conductive face facing the second end of the first conductor and the second end of the second conductor, the conductive face of the diaphragm being biased, by the insulating ring, away from coupling the first and second conductors; and

a latch coupled between the receiver and the switch such that each actuation of the switch toggles the receiver between being coupled to the battery and being uncoupled from the battery.

2. A radio frequency identification device in accordance with claim 1 wherein pushing the switch toggles the receiver between being enabled and disabled.

3. A radio frequency identification device in accordance with claim 1 and further including volatile memory coupled to the receiver and transmitter.

4. A radio frequency identification device comprising:

a housing;

an integrated circuit in the housing including a receiver having an enable input, the receiver being selectively enabled in response to application of a signal of a predetermined voltage value on the enable input, the receiver being configured to receive an interrogation signal when enabled, the integrated circuit further including a modulated backscatter transmitter configured to provide a signal to identify the device in response to an interrogation signal; and

a switch supported by the housing and toggling the receiver between being enabled and disabled, the switch including a first conductor formed of printed thick film and having a first end coupled to the predetermined voltage value and having a second end, a second conductor formed of printed thick film and having a first end coupled to the enable input and having a second end spaced apart from the second end of the first conductor, an insulating ring having a periphery circumscribing the second end of the first conductor and the second end of the second conductor, a diaphragm having a periphery corresponding to the periphery of the insulating ring, and having a conductive face facing the second end of the first conductor and the second end of the second conductor, the conductive face of the diaphragm being spaced apart from the first and second conductors by the insulating ring.

5. A radio frequency identification device in accordance with claim 4 wherein the housing further includes an encapsulant over the diaphragm.

6. A radio frequency identification device in accordance with claim 4 wherein the housing further includes a polyester film substrate, wherein the printed thick film is formed over the substrate, and wherein the housing is configured to effect connection of the second ends of the first and second conductors when pressure is applied to the substrate at location facing the diaphragm.

7. A radio frequency identification device in accordance with claim 4 wherein the housing further includes a polyester film substrate, and further including a battery supplying power to the integrated circuit and to define the predetermined voltage value, and wherein the integrated circuit and the battery are located between the polyester substrate and the encapsulant.