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Thermally-activated microchip chemical delivery devices

  • US 6,669,683 B2
  • Filed: 01/13/2003
  • Issued: 12/30/2003
  • Est. Priority Date: 08/18/1999
  • Status: Expired due to Term
First Claim
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1. An implantable microchip device for the controlled delivery of drug molecules into a patient comprising:

  • at least one substrate;

    a plurality of reservoirs in the substrate;

    a release system which includes drug molecules for release, the release system being provided in each of the reservoirs;

    a reservoir cap positioned on or in each of the reservoirs over the release system, the reservoir cap comprising a material that undergoes a phase change in response to a change in temperature; and

    a heating means capable of selectively causing the phase change independently in each reservoir cap, to release the molecules from the reservoirs.

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