Information storage and identification tag

• US 6,104,311 A
• Filed: 08/26/1996
• Issued: 08/15/2000
• Est. Priority Date: 08/26/1996
• Status: Expired due to Term

• Current Assignee: RF Code Incorporated
• Original Assignee: Addison Technologies, Inc.
• Inventors: Lastinger, Roc A.
• Primary Examiner(s): Holloway, III, Edwin C.
• Application Number:
  US08/702,950
• Time in Patent Office: 1,450 Days
• Field of Search: 340/825.54, 340/825.34, 340/825.31, 340/572, 340/825.69, 340/825.72, 340/572.1, 340/572.3, 340/572.5
• US Class Current: 340/10.51
• CPC Class Codes: G06K 19/067 Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
• CPC Class Codes: G06K 19/0672 with resonating marks
• CPC Class Codes: G06K 7/086 sensing passive circuit, e.g. resonant circuit transponders

Abstract

An improved information storage and identification tag includes a substrate, an input mechanism disposed on the substrate and configured to receive a query signal, an output mechanism disposed on the substrate, and a response circuit disposed on the substrate. The response circuit is disposed in operative communication with the input mechanism and the output mechanism and is configured to output via the output mechanism at least one selectable response code in response to receipt of a query signal by the input mechanism.

Claims

1. A method for encoding an encodable identification tag, said method comprising the steps of:

providing an encodable identification tag including

a substrate, and

electrical circuitry disposed on said substrate and configured to receive a query signal and to output a response signal selectable among a predetermined plurality of response signals in response to receipt of said query signal,

wherein said electrical circuitry includes a plurality of electrical components and a plurality of conductive traces,

wherein each said trace is formed by a conductive material deposited on said substrate, extends between a first said component and a respective second said component, and has selectable states including an electrically conducting state in which said trace is electrically continuous from said first component to said respective second component and an electrically nonconducting state in which a gap is defined in said trace between said component and said respective second component,

wherein said tag defines a receptacle at each said gap to receive conductive material to electrically close said gap, and

wherein said response signal is dependent upon said state of said traces; and

thereafter depositing a conductive material into said gap of at least one of said traces where said trace is in said nonconducting state in said providing step, thereby changing said state of said trace.

2. The method as in claim 1, wherein said providing step includes providing a plurality of said first components.

3. The method as in claim 2, wherein each said second component is connected to a plurality of said first components.

4. The method as in claim 1, wherein said first component is part of a code circuit configured to output a response code in response to said query signal, said code circuit comprising a plurality of said electrical components and being connected to a plurality of said second components by said traces.

5. The method as in claim 4, wherein said response code includes a signal pulse.

6. The method as in claim 4, wherein said electrical circuitry includes a plurality of said code circuits.

7. The method as in claim 6, wherein each said code circuit configured to output a said response signal in association with a said second component at a frequency different from the frequency at which any other code circuit of said plurality of code circuits outputs a said response signal.

8. The method as in claim 1, wherein said electrical circuitry is configured so that a frequency component of said response signal is dependent upon said state of said traces.

9. The method as in claim 1, wherein at least one said second component comprises an antenna.

10. The method as in claim 1, including a plurality of said second components and wherein said second components include a plurality of contact points.

11. The method as in claim 1, wherein said electrical circuitry is passive, said electrical circuitry being configured to output said response signal using energy provided by said query signal.

12. The method as in claim 1, wherein said electrical circuitry is constructed from conductive material printed on said substrate.