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US 9,867,932 B2Granted
Drug delivery device having a cavity sealed by a pressurized membrane
AssigneeInternational Business Machines Corporation
InventorsBing Dang, John U Knickerbocker, Joana S. B. T. Maria, Bucknell C Webb, Steven L Wright
Life of this patent
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Abstract
A digital biomedical device includes a substrate forming a reservoir, a membrane comprising a first layer and a second layer having a strain therebetween, the membrane sealing the reservoir, and a controller configured to activate the membrane and release at least a portion of the strain causing the membrane curl and open the reservoir.
Claims13
A digital biomedical device comprising:
- a substrate forming a reservoir;
- a membrane comprising a first layer and a second layer having a strain therebetween, the membrane sealing the reservoir;
- a controller configured to activate the membrane and release at least a portion of the strain causing the membrane curl and open the reservoir;
- a sealing material disposed between the substrate and the membrane;
- and
- a heater element disposed in or adjacent to the sealing material, wherein the heater element is controlled by the controller to break the seal and allow the membrane to be curled by a bending moment caused by the strain difference between the first layer and the second layer of the membrane.
3 more elements
A membrane sealing a reservoir of a digital biomedical device, the membrane comprising:
- a first layer maintained having a compressive stress;
- and
- a second layer bonded to the first layer and maintained having a tension,
- wherein the first layer and the second layer have different lengths in a stress-less state, and wherein the first layer includes a polymer material and the second layer includes a metal material.
1 more element
A method of manufacturing a digital biomedical device comprising:
- providing a substrate including a reservoir;
- bonding a stress engineered sealing membrane to the substrate, the stress engineered sealing membrane comprising a first layer and a second layer having a strain therebetween, wherein the stress engineered sealing membrane sealing the reservoir;
- and
- cutting the stress engineered sealing membrane around the reservoir.
1 more element
Dependencies are inferred from the claim text.