Flexible circuit having overvoltage protection
First Claim
Patent Images
1. A flexible circuit having overvoltage protection comprising:
- a first flexible layer;
a plurality of signal conductors applied to the first flexible layer;
at least one ground conductor positioned adjacent to at least one of the signal conductors;
a layer of voltage variable material (“
VVM”
) applied to the plurality of signal conductors and the at least one ground conductor such that a first path through the VVM from any of the signal conductors to the at least one ground conductor is smaller than a second path through the VVM from any of the signal conductors to a closest adjacent signal conductor; and
a second flexible layer covering the signal conductors, the at least one ground conductor and the VVM, wherein the at least one ground conductor lies across the plurality of signal conductors, separated from the signal conductor by the VVM.
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Abstract
A first voltage variable material (“VVM”) includes an insulative binder, first conductive particles with a core and a shell held in the insulating binder and second conductive particles without a shell held in the insulating binder; a second VVM includes an insulating binder, first conductive particles with a core and a shell held in the insulating binder, second conductive particles without a shell held in the insulating binder, and semiconductive particles with a core and a shell held in the insulating binder; a third VVM includes only first conductive particles with a core and a shell held in the insulating binder.
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Citations
20 Claims
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1. A flexible circuit having overvoltage protection comprising:
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a first flexible layer; a plurality of signal conductors applied to the first flexible layer; at least one ground conductor positioned adjacent to at least one of the signal conductors; a layer of voltage variable material (“
VVM”
) applied to the plurality of signal conductors and the at least one ground conductor such that a first path through the VVM from any of the signal conductors to the at least one ground conductor is smaller than a second path through the VVM from any of the signal conductors to a closest adjacent signal conductor; anda second flexible layer covering the signal conductors, the at least one ground conductor and the VVM, wherein the at least one ground conductor lies across the plurality of signal conductors, separated from the signal conductor by the VVM. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A flexible circuit having overvoltage protective comprising:
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a first flexible layer; a plurality of signal conductors applied to the first substrate layer; a voltage variable material (“
VVM”
) applied to the plurality of signal conductors;a ground conductor applied to the VVM and across the signal conductors, wherein the ground conductor extends across the signal conductors to a ground trace applied to the first flexible layer; a first gap filled with the VVM between each adjacent signal conductor, the first gap larger than a second gap filled with the VVM between each signal conductor and the ground conductor; and a second flexible layer covering the signal conductors, the ground conductor and the VVM. - View Dependent Claims (13, 14)
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15. A flexible circuit having overvoltage protection comprising:
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a first flexible layer; a signal conductor applied to the first flexible layer; a second flexible layer; a ground conductor applied to the second flexible layer; and a voltage variable material (“
VVM”
) located between the signal and ground conductors, wherein the VVM includes one of;
(i) an insulating binder, first conductive particles with a core and a shell held in the insulating binder, and second conductive particles without a shell held in the insulating binder;
(ii) an insulating binder, first conductive particles with a core and a shell held in the insulating binder, second conductive particles without a shell held in the insulating binder, and semi-conductive particles with a core and a shell held in the insulating binder; and
(iii) a insulating binder and only first conductive particles with a core and shell held in the insulating binder. - View Dependent Claims (16, 17, 18)
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19. A flexible circuit having overvoltage protection comprising:
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a first flexible layer; a plurality of signal conductors applied to the first flexible layer; at least one ground conductor positioned adjacent to at least one of the signal conductors; a layer of voltage variable material (“
VVM”
) applied to the plurality of signal conductors and the at least one ground conductor such that a first path through the VVM from any of the signal conductors to the at least one ground conductor is smaller than a second path through the VVM from any of the signal conductors to a closest adjacent signal conductor; anda second flexible layer covering the signal conductors, wherein the at least one ground conductor comprises a plurality of ground conductors, the VVM and each of the signal conductors in an x-y direction relationship with one of the plurality of ground conductors.
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20. A flexible circuit having overvoltage protection comprising:
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a first flexible layer; a plurality of signal conductors applied to the first flexible layer; at least one ground conductor positioned adjacent to at least one of the signal conductors; a layer of voltage variable material (“
VVM”
) applied to the plurality of signal conductors and the at least one ground conductor such that a first path through the VVM from any of the signal conductors to the at least one ground conductor is smaller than a second path through the VVM from any of the signal conductors to a closest adjacent signal conductor; anda second flexible layer covering the signal conductors, wherein each of the signal conductors lies adjacent to the at least one ground conductor, separated by the VVM.
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Specification