Multilayer planar spiral inductor filter for medical therapeutic or diagnostic applications
First Claim
1. An implantable lead, comprising:
- a) at least one implantable lead conductor extending from a proximal conductor end to a distal conductor portion having a distal conductor end, wherein the proximal conductor end is configured to be electrically connectable to electronic circuits of an implantable medical device;
b) at least one electrode electrically connected to the distal conductor portion or the distal conductor end, wherein the electrode is configured to be placed in contact with biological cells inside a body;
c) a dielectric substrate;
d) at least a first spiral inductor spaced from a second spiral inductor and supported on the dielectric substrate, wherein the first spiral inductor spirals in either a clockwise or counter-clockwise direction from a first electrical point to a first contact pad and wherein the second spiral inductor spirals from a second contact pad to a second electrical point and in a counter-clockwise or clockwise direction that is opposite to that of the first spiral inductor,e) wherein the dielectric substrate is characterized as having been folded along an intermediate fold line located between and spaced from both of the first and second spiral inductors so that the first and second spiral inductors are in a capacitive relationship residing one above the other with the dielectric substrate disposed therebetween;
f) a conductive material extending through the dielectric substrate to electrically connect the first and second contact pads so that the first and second spiral inductors are only electrically connected to each other at the respective first and second contact pads,g) wherein the first and second electrical points of the respective first and second spiral inductors are electrically connected to the lead conductor intermediate the proximal conductor end and the electrode, andh) wherein a first multi-turn loop current of the first spiral inductor is in the same direction as a second multi-turn loop current of the second spiral inductor.
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Accused Products
Abstract
A multilayer helical wave filter having a primary resonance at a selected RF diagnostic or therapeutic frequency or frequency range, includes an elongated conductor forming at least a portion of an implantable medical lead. The elongated conductor includes a first helically wound segment having at least one planar surface, a first end and a second end, which forms a first inductive component, and a second helically wound segment having at least one planar surface, a first end and a second end, which forms a second inductive element. The first and second helically wound segments are wound in the same longitudinal direction and share a common longitudinal axis. Planar surfaces of the helically wound segments face one another, and a dielectric material is disposed between the facing planar surfaces of the helically wound segments and between adjacent coils of the helically wound segments, thereby forming a capacitance.
118 Citations
31 Claims
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1. An implantable lead, comprising:
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a) at least one implantable lead conductor extending from a proximal conductor end to a distal conductor portion having a distal conductor end, wherein the proximal conductor end is configured to be electrically connectable to electronic circuits of an implantable medical device; b) at least one electrode electrically connected to the distal conductor portion or the distal conductor end, wherein the electrode is configured to be placed in contact with biological cells inside a body; c) a dielectric substrate; d) at least a first spiral inductor spaced from a second spiral inductor and supported on the dielectric substrate, wherein the first spiral inductor spirals in either a clockwise or counter-clockwise direction from a first electrical point to a first contact pad and wherein the second spiral inductor spirals from a second contact pad to a second electrical point and in a counter-clockwise or clockwise direction that is opposite to that of the first spiral inductor, e) wherein the dielectric substrate is characterized as having been folded along an intermediate fold line located between and spaced from both of the first and second spiral inductors so that the first and second spiral inductors are in a capacitive relationship residing one above the other with the dielectric substrate disposed therebetween; f) a conductive material extending through the dielectric substrate to electrically connect the first and second contact pads so that the first and second spiral inductors are only electrically connected to each other at the respective first and second contact pads, g) wherein the first and second electrical points of the respective first and second spiral inductors are electrically connected to the lead conductor intermediate the proximal conductor end and the electrode, and h) wherein a first multi-turn loop current of the first spiral inductor is in the same direction as a second multi-turn loop current of the second spiral inductor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. An implantable lead, comprising:
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a) at least one implantable lead conductor extending from a proximal conductor end to a distal conductor portion having a distal conductor end, wherein the proximal conductor end is configured to be electrically connectable to electronic circuits of an implantable medical device; b) at least one electrode electrically connected to the distal conductor portion or the distal conductor end, wherein the electrode is configured to be placed in contact with biological cells inside a body; c) a dielectric substrate; d) at least a first spiral inductor spaced from a second spiral inductor and supported on the dielectric substrate, wherein the first spiral inductor spirals in either a clockwise or counter-clockwise direction from a first electrical point to a first contact pad and wherein the second spiral inductor spirals from a second contact pad to a second electrical point and in a counter-clockwise or clockwise direction that is opposite to that of the first spiral inductor, e) wherein the dielectric substrate is characterized as having been folded along an intermediate fold line located between and spaced from both of the first and second spiral inductors so that the first and second spiral inductors are in a capacitive relationship residing one above the other with the dielectric substrate disposed therebetween; f) a conductive material extending through the dielectric substrate to electrically connect the first and second contact pads so that the first and second spiral inductors are only electrically connected to each other at the respective first and second contact pads, and g) a mandrel comprising an intermediate mandrel body extending from a proximal mandrel end to a distal mandrel end, wherein the proximal and distal mandrel ends are electrically conductive, and wherein the dielectric substrate is supported on the mandrel with the first and second electrical points being electrically connected to respective one of the proximal and distal electrically conductive mandrel ends, h) wherein the first and second electrically conductive mandrel ends are electrically connected to the lead conductor intermediate the proximal conductor end and the electrode, and i) wherein a first multi-turn loop current of the first spiral inductor is in the same direction as a second multi-turn loop current of the second spiral inductor. - View Dependent Claims (29)
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30. An implantable lead, comprising:
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a) at least one implantable lead conductor extending from a proximal conductor end to a distal conductor portion having a distal conductor end, wherein the proximal conductor end is configured to be electrically connectable to electronic circuits of an implantable medical device; b) at least one electrode electrically connected to the distal conductor portion or the distal conductor end, wherein the electrode is configured to be placed in contact with biological cells inside a body; c) a dielectric substrate; d) at least a first spiral inductor spaced from a second spiral inductor and supported on the dielectric substrate, wherein the first spiral inductor spirals in either a clockwise or counter-clockwise direction from a first electrical point to a first contact pad and wherein the second spiral inductor spirals from a second contact pad to a second electrical point and in a counter-clockwise or clockwise direction that is opposite to that of the first spiral inductor, e) wherein the dielectric substrate is characterized as having been folded along an intermediate fold line located between and spaced from both of the first and second spiral inductors so that the first and second spiral inductors are adjacent to each other with the dielectric substrate disposed therebetween; and f) a second dielectric substrate located between the first and second spiral inductors so that the first and second spiral inductors are in a capacitive relationship residing one above the other; g) a conductive material extending through the second dielectric substrate to electrically connect the first and second contact pads so that the first and second spiral inductors are only electrically connected to each other at the respective first and second contact pads, h) wherein the first and second electrical points of the respective first and second spiral inductors are electrically connected to the lead conductor intermediate the proximal conductor end and the electrode, and i) wherein a first multi-turn loop current of the first spiral inductor is in the same direction as a second multi-turn loop current of the second spiral inductor.
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31. An implantable lead, comprising:
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a) at least one implantable lead conductor extending from a proximal conductor end to a distal conductor portion having a distal conductor end, wherein the proximal conductor end is configured to be electrically connectable to electronic circuits of an implantable medical device; b) at least one electrode electrically connected to the distal conductor portion or the distal conductor end, wherein the electrode is configured to be placed in contact with biological cells inside a body; c) a dielectric substrate; d) at least a first spiral inductor spaced from a second spiral inductor and supported on the dielectric substrate, wherein the first spiral inductor spirals inwardly in either a clockwise or counter-clockwise direction from a first electrical point adjacent to an edge of the dielectric substrate to a first contact pad centrally located inside the first spiral inductor and wherein the second spiral inductor spirals outwardly in a counter-clockwise or clockwise direction that is opposite to that of the first spiral inductor from a second centrally located contact pad to a second electrical point adjacent to an edge of the dielectric substrate, e) wherein the dielectric substrate is characterized as having been folded along an intermediate fold line located between and spaced from both of the first and second spiral inductors so that the first and second spiral inductors are in a capacitive relationship residing one above the other with the dielectric substrate disposed therebetween, f) a conductive material extending through the dielectric substrate to electrically connect the first and second contact pads so that the first and second spiral inductors are only electrically connected to each other at the respective first and second contact pads, g) wherein the first and second electrical points of the respective first and second spiral inductors are electrically connected to the lead conductor intermediate the proximal conductor end and the electrode, and h) wherein a first multi-turn loop current of the first spiral inductor is in the same direction as a second multi-turn loop current of the second spiral inductor.
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Specification