Electronic article surveillance (EAS) tag/device with coplanar and/or multiple coil circuits, an EAS tag/device with two or more memory bits, and methods for tuning the resonant frequency of an RLC EAS tag/device
First Claim
1. A surveillance and/or identification device, comprising:
- a) an outer inductor having a first end coupled to one of a first linear capacitor plate or a first nonlinear capacitor plate;
b) an inner inductor having a first end coupled to the other of said first linear capacitor plate or said first nonlinear capacitor plate;
c) a first dielectric film on said outer inductor, said inner inductor, said first linear capacitor plate and said first nonlinear capacitor plate, the first dielectric film having openings therein exposing second ends of each of the outer and inner inductors;
d) a second linear capacitor plate on the first dielectric film, coupled to the first linear capacitor plate; and
e) a second nonlinear capacitor plate on the first dielectric film, coupled to the first nonlinear capacitor plate;
f) a second dielectric film containing holes therein for the second linear capacitor plate and the second nonlinear capacitor plate, and exposing the second ends of the outer and inner inductors; and
g) first and second conducting straps on the second dielectric film, each configured to electrically connect one of the second inductor ends to a corresponding second capacitor plate.
3 Assignments
0 Petitions
Accused Products
Abstract
An electronic article surveillance (EAS) tag/device with coplanar and/or multiple coil circuits, a tag/device with two or more memory bits, and methods for making and tuning the resonant frequency of an EAS tag/device. The device generally includes: an outer inductor having one end coupled to a capacitor plate; an inner inductor having one end coupled to an other capacitor plate; a first dielectric film on the outer and inner inductors and the capacitor plates coupled thereto, having openings therein exposing other ends of the outer and inner inductors; a linear capacitor plate and a nonlinear capacitor plate on the first dielectric film; a second dielectric film containing holes therein for the second linear and nonlinear capacitor plates, and exposing the other ends of the first and second inductors; and first and second conducting straps on the second dielectric film, electrically connecting one of the exposed inductor ends to a corresponding second capacitor plate.
-
Citations
32 Claims
-
1. A surveillance and/or identification device, comprising:
-
a) an outer inductor having a first end coupled to one of a first linear capacitor plate or a first nonlinear capacitor plate; b) an inner inductor having a first end coupled to the other of said first linear capacitor plate or said first nonlinear capacitor plate; c) a first dielectric film on said outer inductor, said inner inductor, said first linear capacitor plate and said first nonlinear capacitor plate, the first dielectric film having openings therein exposing second ends of each of the outer and inner inductors; d) a second linear capacitor plate on the first dielectric film, coupled to the first linear capacitor plate; and e) a second nonlinear capacitor plate on the first dielectric film, coupled to the first nonlinear capacitor plate; f) a second dielectric film containing holes therein for the second linear capacitor plate and the second nonlinear capacitor plate, and exposing the second ends of the outer and inner inductors; and g) first and second conducting straps on the second dielectric film, each configured to electrically connect one of the second inductor ends to a corresponding second capacitor plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 23, 26, 28)
-
-
11. A method for making a surveillance and/or identification device, comprising the steps of:
-
a) depositing a semiconductor material or semiconductor material precursor on a first dielectric film, said first dielectric film being on an electrically functional substrate; b) forming a semiconductor component from said semiconductor material or semiconductor material precursor; c) forming a second dielectric film on the first dielectric film and the semiconducting component, the second dielectric film having holes therein to facilitate electrical connection to the semiconductor component and the substrate; d) forming a plurality of conductive structures, a first one of which is at least partly on said semiconductor component and which comprises a first electrically conducting strap configured to provide electrical communication between said semiconductor component and said electrically functional substrate, and a second one of which comprises a second electrically conducting strap configured to provide electrical communication between a linear capacitor plate and the electrically functional substrate; and e) etching said electrically functional substrate to form an inner inductor and an outer inductor. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
-
-
24. A method for making a surveillance and/or identification device from an electrically functional substrate having a first dielectric film thereon, comprising the steps of:
-
a) forming a second dielectric film on the first dielectric film, the second dielectric film having holes therein to facilitate electrical connection(s); b) depositing a semiconductor material or semiconductor material precursor into at least one of said holes; c) forming a semiconductor component from said semiconductor material or semiconductor material precursor; d) forming a plurality of conductive structures, a first one of which is at least partly on said semiconductor component and which comprises a first electrically conducting strap configured to provide electrical communication between said semiconductor component and said electrically functional substrate, and a second one of which comprises a second electrically conducting strap configured to provide electrical communication between a linear capacitor plate and the electrically functional substrate; and e) etching said electrically functional substrate to form an inner inductor and an outer inductor.
-
-
25. A method of tuning a surveillance and/or identification device, comprising:
-
a) forming a conductive structure configured to provide electrical communication between a capacitor plate of said device and an electrically functional substrate; and b) etching said electrically functional substrate to form an inductor and an electromagnetically active inner plug or ring, said inner plug or ring having dimensions and/or a location sufficient to shift a resonant frequency of the inductor. - View Dependent Claims (27, 29, 31, 32)
-
-
30. A surveillance and/or identification device, comprising:
-
a) a first inner circuit having a first inductor coupled to a first capacitor, said first inner circuit being tuned to resonate at a first resonant frequency, said first inner circuit configured to be deactivated at twice said first resonant frequency; b) a second inner circuit having a second inductor coupled to a second capacitor, said second inner circuit being tuned to resonate at a second resonant frequency, said second inner circuit configured to be deactivated at twice said second resonant frequency; and c) an outer circuit having a third inductor coupled to a third capacitor, said third inductor concentrically surrounding and substantially coplanar with said first and second circuits; said device being configured to be responsive to an applied signal having a frequency related to said first and second resonant frequencies.
-
Specification