Packaging sensors for long term implant
First Claim
1. A pressure sensor device implantable in a living body, the pressure sensor device comprising:
- an insulating substrate that defines a feedthrough region, the insulating substrate having a first outer surface and a second outer surface, the first outer surface of the insulating substrate opposing the second outer surface of the insulating substrate;
a pressure sensor having a first outer surface and a second outer surface, the first outer surface of the pressure sensor opposing the second outer surface of the pressure sensor, and the pressure sensor directly mounted on the insulating substrate such that the first outer surface of the pressure sensor is in contact with the second outer surface of the insulating substrate;
an electrical conductor received in the feedthrough region;
a bond wire connected to the electrical conductor and to the pressure sensor, wherein the bond wire is embedded in an insulative sheath;
a lead connected to the electrical conductor and configured for connection to an implantable medical device; and
a thin film of hermetic material encapsulating both the second outer surface of the pressure sensor and the first outer surface of the insulating substrate, an inner surface of the thin film directly contacting the second outer surface of the pressure sensor and the first outer surface of the insulating substrate to form a voidless encapsulation of the pressure sensor and the insulating substrate;
wherein the thin film of hermetic material is a continuous thin film encapsulating both the second outer surface of the pressure sensor and the first outer surface of the insulating substrate.
1 Assignment
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Accused Products
Abstract
According to this technique of packaging a sensor device implantable in a living body so as to provide protection of the sensor device and to the living body itself, an electrical conductor of the sensor device is sealed in an insulating substrate extending between proximal and distal ends. The distal end of the electrical conductor is externally connected to an external sensor on the sensor device and the proximal end of the electrical conductor is externally connected to a distal end of a lead wire extending proximally to a pulse generator and these connections are embedded in an insulative sheath. The external sensor, substrate, and insulative sheath are encapsulated in a thin film of hermetic material without interference with the lead wire. In another embodiment, a layer of insulating material may underlie the hermetic material to encapsulate the external sensor and the substrate.
55 Citations
31 Claims
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1. A pressure sensor device implantable in a living body, the pressure sensor device comprising:
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an insulating substrate that defines a feedthrough region, the insulating substrate having a first outer surface and a second outer surface, the first outer surface of the insulating substrate opposing the second outer surface of the insulating substrate; a pressure sensor having a first outer surface and a second outer surface, the first outer surface of the pressure sensor opposing the second outer surface of the pressure sensor, and the pressure sensor directly mounted on the insulating substrate such that the first outer surface of the pressure sensor is in contact with the second outer surface of the insulating substrate; an electrical conductor received in the feedthrough region; a bond wire connected to the electrical conductor and to the pressure sensor, wherein the bond wire is embedded in an insulative sheath; a lead connected to the electrical conductor and configured for connection to an implantable medical device; and a thin film of hermetic material encapsulating both the second outer surface of the pressure sensor and the first outer surface of the insulating substrate, an inner surface of the thin film directly contacting the second outer surface of the pressure sensor and the first outer surface of the insulating substrate to form a voidless encapsulation of the pressure sensor and the insulating substrate; wherein the thin film of hermetic material is a continuous thin film encapsulating both the second outer surface of the pressure sensor and the first outer surface of the insulating substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An implantable medical device comprising:
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a pulse generator; an implantable lead having a distal portion and a proximal portion, the proximal portion connected to the pulse generator; and a pressure sensor device connected to the implantable lead, the pressure sensor device comprising; an insulating substrate that defines a feedthrough region, the insulating substrate having a first outer surface and a second outer surface, and the first outer surface of the insulating substrate opposing the second outer surface of the insulating substrate; a pressure sensor having a first outer surface and a second outer surface, the first outer surface of the pressure sensor opposing the second outer surface of the pressure sensor, and the pressure sensor mounted directly on the insulating substrate such that the first outer surface of the pressure sensor is in contact with the second outer surface of the insulating substrate; an electrical conductor received in the feedthrough region, the electrical conductor electrically coupled to the implantable lead; a layer of insulating material encapsulating both the pressure sensor and the insulating substrate, an inner surface of the layer of insulating material directly contacting the first outer surface of the insulating substrate and the second outer surface of the pressure sensor to form a voidless encapsulation of the pressure sensor and the insulating substrate; and a thin film of hermetic material encapsulating the layer of insulating material, an inner surface of the thin film of hermetic material directly contacting an outer surface of the layer of insulating material to form a voidless encapsulation of the layer of insulating material; wherein the thin film of hermetic material is a continuous thin film encapsulating both the second outer surface of the pressure sensor and the first outer surface of the insulating substrate. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An implantable medical device comprising:
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a pulse generator; an implantable lead having a distal portion and a proximal portion, the proximal portion connected to the pulse generator; and a pressure sensor device connected to the implantable lead, the pressure sensor device comprising; an insulating substrate that defines a feedthrough region, the insulating substrate having a first outer surface and a second outer surface, and the first outer surface of the insulating substrate opposing the second outer surface of the insulating substrate; a pressure sensor having a first outer surface and a second outer surface, the first outer surface of the pressure sensor opposing the second outer surface of the pressure sensor, and the pressure sensor directly mounted on the insulating substrate such that the first outer substrate of the pressure sensor is in contact with the second outer surface of the insulating substrate; an electrical conductor received in the feedthrough region, the electrical conductor electrically coupled to the implantable lead; and a thin film of hermetic material encapsulating both the insulating substrate and the pressure sensor, an inner surface of the thin film of hermetic material directly contacting the first outer surface of the insulating substrate and the second outer surface of the pressure sensor to form a voidless encapsulation of the insulating substrate and the pressure sensor; wherein the thin film of hermetic material is a continuous thin film encapsulating both the second outer surface of the pressure sensor and the first outer surface of the insulating substrate. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
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Specification