Integrated tank filter for a medical therapeutic device
First Claim
1. An implantable lead that is configured for connection to an implantable medical device, the implantable lead comprising:
- a) an electrical conductor having a length extending from a proximal conductor end that is configured to be connectable to a medical device to a distal conductor end;
b) a tank filter electrically connected in series with the electrical conductor somewhere along the length thereof, the tank filter comprising;
i) a capacitor comprising at least one first electrode plate supported on a first ceramic substrate and at least one second electrode plate supported on a second ceramic substrate, wherein the first and second ceramic substrates are stacked one on top of the other so that the first and second electrode plates at least partially overlay each other in a spaced apart relationship and wherein the first and second electrode plates are electrically connected to spaced apart first and second metallization surfaces; and
ii) an inductor comprising at least one inductor trace of electrically conductive material supported on a third ceramic substrate, wherein the third ceramic substrate is layered either on top or on the bottom of the stacked first and second substrates, but with the inductor trace spaced apart from the first and second electrode plates; and
iii) wherein the first, second and third ceramic substrates are characterized as having been sintered together to form a monolithic body with the spaced apart ends of the inductor trace being electrically connected, to the respective first and second metallization surfaces to thereby electrically connect the capacitor in parallel with the inductor; and
c) an electrode electrically connected to the electrical conductor at a position that is distal of the tank filter.
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Accused Products
Abstract
A TANK filter is provided for a lead wire of an active medical device (AMD). The TANK filter includes a capacitor in parallel with an inductor. The parallel capacitor and inductor are placed in series with the lead wire of the AMD, wherein values of capacitance and inductance are selected such that the TANK filter is resonant at a selected frequency. The Q of the inductor may be relatively maximized and the Q of the capacitor may be relatively minimized to reduce the overall Q of the TANK filter to attenuate current flow through the lead wire along a range of selected frequencies. In a preferred form, the TANK filter is integrated into a TIP and/or RING electrode for an active implantable medical device.
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Citations
33 Claims
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1. An implantable lead that is configured for connection to an implantable medical device, the implantable lead comprising:
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a) an electrical conductor having a length extending from a proximal conductor end that is configured to be connectable to a medical device to a distal conductor end; b) a tank filter electrically connected in series with the electrical conductor somewhere along the length thereof, the tank filter comprising; i) a capacitor comprising at least one first electrode plate supported on a first ceramic substrate and at least one second electrode plate supported on a second ceramic substrate, wherein the first and second ceramic substrates are stacked one on top of the other so that the first and second electrode plates at least partially overlay each other in a spaced apart relationship and wherein the first and second electrode plates are electrically connected to spaced apart first and second metallization surfaces; and ii) an inductor comprising at least one inductor trace of electrically conductive material supported on a third ceramic substrate, wherein the third ceramic substrate is layered either on top or on the bottom of the stacked first and second substrates, but with the inductor trace spaced apart from the first and second electrode plates; and iii) wherein the first, second and third ceramic substrates are characterized as having been sintered together to form a monolithic body with the spaced apart ends of the inductor trace being electrically connected, to the respective first and second metallization surfaces to thereby electrically connect the capacitor in parallel with the inductor; and c) an electrode electrically connected to the electrical conductor at a position that is distal of the tank filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An integrated tank filter for connection in series with an implantable lead, the tank filter which comprises:
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a) a capacitor including a first set of one or more electrode plates conductively coupled to a first metallization surface, and a second set of one or more electrode plates conductively coupled to a second metallization surface, wherein the capacitor includes a passage therethrough, the passage being at least partially lined by the first metallization surface; and b) an inductor trace disposed on or embedded within the capacitor, the inductor trace having a first end conductively coupled to the first metallization surface, and a second end conductively coupled to the second metallization surface.
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18. A medical therapeutic device, which comprises:
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a) an elongate electrical conductor having a length extending from a proximal conductor end to a distal conductor end; b) a tank filter electrically connected in series with the electrical conductor somewhere along the length thereof, the tank filter comprising; i) a capacitor comprising at least one first electrode plate supported on a first ceramic substrate and at least one second electrode plate supported on a second ceramic substrate, wherein the first and second ceramic substrates are stacked one on top of the other so that the first and second electrode plates at least partially overlay each other in a spaced apart relationship and wherein the first, and second electrode plates are electrically connected to spaced apart first and second metallization surfaces; ii) an inductor comprising at least one inductor trace of electrically conductive material supported on a third ceramic substrate, wherein the third ceramic substrate is layered either on top or on the bottom of the stacked first, and second substrates, but with the inductor trace spaced apart from the first and second electrode plates; and iii) wherein the first, second and third ceramic substrates are characterized as having been sintered together to form a monolithic body with the spaced apart ends of the inductor trace being electrically connected to the respective first and second metallization surfaces to thereby electrically connect the capacitor in parallel with the inductor; and c) an electrode electrically connected to the electrical conductor at a position that is distal of the tank filter. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification