Hermetic terminal for an AIMD having a composite brazed conductive lead
First Claim
1. A feedthrough attachable to an active implantable medical device (AIMD), the feedthrough comprising:
- a) a ferrule, comprising a conductive ferrule body defined as having a ferrule first side opposite a ferrule second side and defining a ferrule opening between and through the ferrule first and second sides;
b) an insulator substrate assembly comprising;
i) an insulator body defined as having an insulator first side opposite an insulator second side, the insulator first side and insulator second side separated and connected by an outer surface, wherein the insulator body is at least partially disposed within the ferrule opening;
ii) at least one via hole disposed through the insulator body and extending from the insulator first side to the insulator second side;
iii) an internal metallization formed at least partially on an inner surface of the at least one via hole;
iv) a first conductive leadwire having a first leadwire first end disposed within the at least one via hole and having a first leadwire second end extending outwardly beyond the insulator first side;
v) a second conductive leadwire which is not of the same material as the first leadwire, the second leadwire having a second leadwire first end disposed within the at least one via hole and having a second leadwire second end extending outwardly beyond the insulator second side;
vi) wherein the first leadwire first end is disposed at or adjacent to the second leadwire first end;
vii) a first braze contacting the first leadwire first end, the second leadwire first end and the internal metallization, the first braze forming a first hermetic seal separating the insulator first side from the insulator second side in the at least one via hole;
viii) an external metallization disposed at least partially on the outer surface of the insulator body,ix) wherein the insulator body is at least partially disposed within the ferrule opening; and
c) a second braze contacting the external metallization of the insulator body and the conductive ferrule body to thereby form a second hermetic seal at the ferrule opening.
2 Assignments
0 Petitions
Accused Products
Abstract
An insulative feedthrough attachable to an active implantable medical device includes a feedthrough body having a material which is both electrically insulative, biocompatible and separates a body fluid side from a device side. A passageway is disposed through the feedthrough body. A composite conductor is disposed within the passageway and has a body fluid side metallic wire electrically conductive to a device side metallic wire. The body fluid side metallic wire extends from a first end disposed inside the passageway to a second end on the body fluid side. The device side metallic wire extends from a first end disposed inside the passageway to a second end on the device side. The body fluid side metallic wire is hermetically sealed to the feedthrough body. The body fluid side metallic wire is biocompatible and is not the same material as the device side metallic wire.
57 Citations
67 Claims
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1. A feedthrough attachable to an active implantable medical device (AIMD), the feedthrough comprising:
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a) a ferrule, comprising a conductive ferrule body defined as having a ferrule first side opposite a ferrule second side and defining a ferrule opening between and through the ferrule first and second sides; b) an insulator substrate assembly comprising; i) an insulator body defined as having an insulator first side opposite an insulator second side, the insulator first side and insulator second side separated and connected by an outer surface, wherein the insulator body is at least partially disposed within the ferrule opening; ii) at least one via hole disposed through the insulator body and extending from the insulator first side to the insulator second side; iii) an internal metallization formed at least partially on an inner surface of the at least one via hole; iv) a first conductive leadwire having a first leadwire first end disposed within the at least one via hole and having a first leadwire second end extending outwardly beyond the insulator first side; v) a second conductive leadwire which is not of the same material as the first leadwire, the second leadwire having a second leadwire first end disposed within the at least one via hole and having a second leadwire second end extending outwardly beyond the insulator second side; vi) wherein the first leadwire first end is disposed at or adjacent to the second leadwire first end; vii) a first braze contacting the first leadwire first end, the second leadwire first end and the internal metallization, the first braze forming a first hermetic seal separating the insulator first side from the insulator second side in the at least one via hole; viii) an external metallization disposed at least partially on the outer surface of the insulator body, ix) wherein the insulator body is at least partially disposed within the ferrule opening; and c) a second braze contacting the external metallization of the insulator body and the conductive ferrule body to thereby form a second hermetic seal at the ferrule opening. - 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, 28)
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29. An insulative feedthrough that is configured to attachable to an active implantable medical device (AIMD), the insulative feedthrough comprising:
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a) a feedthrough body comprising a material which is both electrically insulative and biocompatible, wherein the feedthrough body has a body fluid side opposite a device side, wherein, when the feedthrough body is attached to a housing for the AIMD, the body fluid side of the feedthrough body resides outside the AIMD and the device side of the feedthrough body resides inside the AIMD; b) a passageway disposed through the feedthrough body extending from the body fluid side to the device side; c) a composite conductor disposed within the passageway, the composite conductor comprising a body fluid side metallic wire electrically conductive to a device side metallic wire, i) wherein the body fluid side metallic wire extends from a first end disposed inside the passageway to a second end on the body fluid side; ii) wherein the device side metallic wire extends from a first end disposed inside the passageway to a second end on the device side; iii) wherein the body fluid side metallic wire is hermetically sealed to the feedthrough body by a braze; iv) wherein the body fluid side metallic wire is biocompatible; v) wherein the body fluid side metallic wire is not the same material as the device side metallic wire; and vi) wherein the body fluid side metallic wire is conductively connected to the device side metallic wire by at least one of the braze and a weld. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66)
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67. An insulator substrate assembly, comprising:
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a) an insulator body configured to be attachable to a ferrule or a housing of an active implantable medical device, the insulator body defined as having an insulator first side opposite an insulator second side, the insulator first side and insulator second side separated and connected by an insulator outer surface; b) at least one via hole disposed through the insulator body extending from the insulator first side to the insulator second side; c) a first conductive leadwire having a first leadwire first end disposed within the at least one via hole and having a first leadwire second end disposed at or extending outwardly beyond the insulator first side; d) a second conductive leadwire having a second leadwire first end disposed within the at least one via hole and having a second leadwire second end disposed at or extending outwardly beyond the insulator second side, wherein the first leadwire is not the same material as the second leadwire, e) wherein the first leadwire first end is disposed at or adjacent to the second leadwire first end, f) wherein the first leadwire and second leadwire are in electrical communication with each other, and g) wherein at least the first leadwire is hermetically sealed within the at least one via hole to the insulator body.
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Specification