Piezoelectric energy harvesting
First Claim
1. An energy harvesting unit comprising:
- a base including a first cavity forming a ledge in the base and a second cavity stepped down from the ledge;
a plurality of electrical contacts formed on the ledge;
a plurality of electrical contacts formed on a bottom of the base and in electrical communication with the electrical contacts formed on the ledge;
a lid coupled to the base to form a sealed interior volume; and
,a piezoelectric member located in the sealed volume and electrically coupled to the electrical contacts formed on the ledge, the piezoelectric member spanning across the second cavity and extending over three sides of the ledge, the piezoelectric member including at least two gaps positioned over the second cavity forming a cantilevered portion extending over the second cavity.
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Abstract
An energy harvesting unit comprising: a package formed by a base and a lid, the package including a sealed interior volume and an exterior; a ledge formed in the sealed interior volume with a first cavity above and a second cavity below the ledge; a plurality of inner electrical contacts formed on the ledge; a plurality of outer electrical contacts formed on the exterior of the package wherein the outer electrical contacts are electrically connected to the inner electrical contacts through the package; and, a piezo-electric member in electrical communication with the inner electrical contacts and coupled to the ledge on a first side of the package and spanning across the cavity and coupled to the ledge on an opposite side of the package.
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Citations
22 Claims
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1. An energy harvesting unit comprising:
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a base including a first cavity forming a ledge in the base and a second cavity stepped down from the ledge; a plurality of electrical contacts formed on the ledge; a plurality of electrical contacts formed on a bottom of the base and in electrical communication with the electrical contacts formed on the ledge; a lid coupled to the base to form a sealed interior volume; and
,a piezoelectric member located in the sealed volume and electrically coupled to the electrical contacts formed on the ledge, the piezoelectric member spanning across the second cavity and extending over three sides of the ledge, the piezoelectric member including at least two gaps positioned over the second cavity forming a cantilevered portion extending over the second cavity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An energy harvesting unit comprising:
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a package formed by a base and a lid, the package including a sealed interior volume and an exterior; a ledge formed in the sealed interior volume with a first cavity above and a second cavity below the ledge; a plurality of inner electrical contacts formed on the ledge; a plurality of outer electrical contacts formed on the exterior of the package wherein the outer electrical contacts are electrically connected to the inner electrical contacts through the package; and
,a piezoelectric member in electrical communication with the inner electrical contacts and spanning across the cavity and coupled to the ledge on three sides of the package. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification