Abstract:
A piezoelectronic transistor device includes a first piezoelectric (PE) layer, a second PE layer, and a piezoresistive (PR) layer arranged in a stacked configuration, wherein an electrical resistance of the PR layer is dependent upon an applied voltage across the first and second PE layers by an applied pressure to the PR layer by the first and second PE layers. A piezoelectronic logic device includes a first and second piezoelectric transistor (PET), wherein the first and second PE layers of the first PET have a smaller cross sectional area than those of the second PET, such that a voltage drop across the PE layers of the first PET creates a first pressure in the PR layer of the first PET that is smaller than a second pressure in the PR layer of the second PET created by the same voltage drop across the PE layers of the second PET.
Abstract:
An inkjet head includes a substrate that defines a cavity in which ink is stored, a vibrating membrane that is supported by the substrate and that defines the cavity, and a piezoelectric device that is disposed on the vibrating membrane and that changes a volume of the cavity by displacing the vibrating membrane. The piezoelectric device includes a lower electrode, a piezoelectric membrane that is disposed on the lower electrode, and an upper electrode that is disposed on the piezoelectric membrane and that faces the lower electrode with the piezoelectric membrane interposed between the upper electrode and the lower electrode. The piezoelectric membrane includes a columnar structure layer and an amorphous structure layer of a piezoelectric material. The amorphous structure layer is stacked contiguously with the columnar structure layer.
Abstract:
Piezoelectric actuators for synthetic jets and other devices are disclosed having orthotropic piezoelectric bimorphs with increased out-of-plane displacements for greater responsiveness to applied electric fields. In some embodiments, the piezoelectric actuators may include interdigitated electrodes applied to a surface of a piezoelectric plate to produce greater in-plane strains in the plate and greater out-of-plane displacements of a flexible diaphragm of the synthetic jet. In other embodiments, the actuator includes an orthotropic piezoceramic plate having a greater d coupling coefficient in one in-plane direction and in the other in-plane direction to cause desired diaphragm out-of-plane displacements when an electric field is applied by electrodes.
Abstract:
A piezoelectric element according to the present invention includes a piece of piezoelectric material and a plurality of electrodes disposed on both surfaces of the piezoelectric material. The piezoelectric material is including a perovskite-type metal oxide represented by general formula (1) below as a main component, a portion or the entire of the piezoelectric material is held by the plurality of electrodes, and the piezoelectric material held by the electrodes has a first region having remanent polarization. General Formula (1) (Ba1-x-yCaxSny)α(Ti1-zZrz)O3 (where 0.020≦x≦0.200, 0.020≦y≦0.200, 0≦z≦0.050, and 0.986≦α≦1.100)
Abstract:
An electromechanical transducer element includes a substrate; a common electrode disposed on the substrate; an electromechanical transducer film formed on the common electrode; an individual electrode formed on the electromechanical transducer film; a common electrode pad electrically connected to the common electrode; an individual electrode pad electrically connected to the individual electrode; and an insulation protective film formed on the common electrode and the individual electrode, contacting an upper end of the individual electrode pad, and surrounding a side surface of the individual electrode pad. The insulation protective film has a gradually decreasing thickness outward from an end of the individual electrode pad.
Abstract:
A multi-layer piezoelectric element includes a stacked body in which piezoelectric layers and internal electrode layers are alternately laminated and a stress relaxing layer is disposed at part of portions between the piezoelectric layers, and an external electrode that is bonded to a side face of the stacked body so as to make electrical connection with the internal electrode layers, the internal electrode layers being not exposed on the side face of the stacked body, but the stress relaxing layer being exposed on the side face of the stacked body.
Abstract:
Provided is an electronic device including: a base; a panel; a support for supporting the panel with respect to the base; and a vibrator for causing the panel to vibrate at a given frequency. The support includes a first region located at a part corresponding to a node of vibration of the panel, and a second region located at a part other than the node of the vibration of the panel. The support has a rigidity that is smaller in the first region than in the second region.
Abstract:
A method of producing a fully active multilayer element including producing a fully active stack, and optionally sintering of the fully active stack or a green precursor thereof; applying outer electrodes onto sides A′ and C′ of the fully active stack and contacting of the uncoated inner electrodes so that the two outer electrodes electrically connect to the uncoated inner electrode layers.
Abstract:
A multi-layer piezoelectric element includes a stacked body including piezoelectric layers and internal electrode layers, which are alternately stacked; an external electrode layer attached to a side surface of the stacked body, the external electrode layer being elongated in a stacking direction of the stacked body and electrically connected with ends of the internal electrode layers which are exposed on the side surface; and an external electrode plate bonded to the external electrode layer therealong by an electrically conducting bonding material. The external electrode plate is provided with slits which extend from opposite long sides toward a center thereof in such a manner that tips of the respective slits overlap each other when viewed in the stacking direction of the stacked body, and a portion thereof where the tips of the respective slits overlap each other is provided with a hole extending along an extension direction of the slit.
Abstract:
There is provided a piezoelectric element including: a piezoelectric body including positive electrode layers and negative electrode layers alternately stacked on element layers; a polymer layer stacked on at least one surface of the piezoelectric body; a first external electrode stacked so as to contact the polymer layer; and a second external electrode disposed to be spaced apart from the first external electrode and stacked so as to contact the polymer layer.