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Packaging sensors for long term implant

  • US 7,347,826 B1
  • Filed: 10/16/2003
  • Issued: 03/25/2008
  • Est. Priority Date: 10/16/2003
  • Status: Expired due to Fees
First Claim
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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.

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