Abstract: A method of fabricating an acoustic transducer comprising: fabricating a substrate; depositing a bottom electrode on the substrate; depositing an active layer on the bottom electrode; depositing a top electrode on the active layer; wherein at least one electrode is patterned to form at least two active elements; and, wherein a ratio of a thickness coupling coefficient kt to an effective lateral coupling coefficient k31,eff of the active layer is 1.3 or greater.

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.

Abstract: A method of fabricating an acoustic transducer comprising: fabricating a substrate; depositing a bottom electrode on the substrate; depositing an active layer on the bottom electrode; depositing a top electrode on the active layer; wherein at least one electrode is patterned to form at least two active elements; and, wherein a ratio of a thickness coupling coefficient kt to an effective lateral coupling coefficient k31,eff of the active layer is 1.3 or greater.

Abstract: A generator unit to harvest energy from motion is disclosed which comprises a support (6) with a connection member (7) for attachment to a movable object (8), at least a first body (3) and a second body (9) supported by the support and configured to move relatively to each other and with a varying, preferably magnetic field (4) spatially in between, one of the first or second body comprising at least one electricity generating member (2) of piezoelectric, electromagnetic or electrostatic type to produce electricity when mechanically deformed or moved, and a field engagement part (5) configured to move in the varying field when the first and second bodies move relatively to each other and generate a varying mechanical deformation or movement of the electricity generating member.

Abstract: A generator unit to harvest energy from motion is disclosed which comprises a support (6) with a connection member (7) for attachment to a movable object (8), at least a first body (3) and a second body (9) supported by the support and configured to move relatively to each other and with a varying, preferably magnetic field (4) spatially in between, one of the first or second body comprising at least one electricity generating member (2) of piezoelectric, electromagnetic or electrostatic type to produce electricity when mechanically deformed or moved, and a field engagement part (5) configured to move in the varying field when the first and second bodies move relatively to each other and generate a varying mechanical deformation or movement of the electricity generating member.