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| Number | Title | Issue Date |
| 7969073 | Tangentially poled single crystal ring resonator A tangentially poled piezoelectric single crystal ring resonator is disclosed. A single crystal material is machined into elements and formed into a ring structure. The single crystal elements have a poled tangential axis. The elements may also have a , | 06/28/2011 |
| 7911117 | Piezoelectric/electrostrictive body, and piezoelectric/electrostrictive element The piezoelectric/electrostrictive body is represented by a composition formula ABO3 (A includes at least one element selected from the group consisting of Li, Na and K, and B includes at least one element selected from the group consisting of Nb, Ta, Sb ... | 03/22/2011 |
| 7876031 | Piezoelectric thin-film acoustic wave device and information processing unit using the same A piezoelectric thin-film acoustic wave device formed of a piezoelectric thin film of AlN on the +C plane and having the polarization strength of not lower than 0.63×10−20 F/V and an information processing unit using the same are disclosed. This is the... | 01/25/2011 |
| 7772747 | Process for producing a piezoelectric film, film forming apparatus, and piezoelectric film A piezoelectric film is formed on a substrate by a sputtering technique at a film formation temperature higher than a Curie temperature. An electric field is formed across the piezoelectric film in a direction heading from a surface side of the piezoelectric film to... | 08/10/2010 |
| 7728492 | Piezoelectric composite material A composition of matter having multiple layers of different conductors separated by thin layers of dielectric materials has a high piezoelectric coefficient when the conductors are metals having a significant difference in work function and the dielectric materials ... | 06/01/2010 |
| 7714485 | Piezoelectric thin-film acoustic wave device and information processing unit using the same A piezoelectric thin-film acoustic wave device formed of a piezoelectric thin film of AlN on the +C plane and having the polarization strength of not lower than 0.63×10−20 F/V and an information processing unit using the same are disclosed. This is the... | 05/11/2010 |
| 7521844 | Piezoelectric single-crystal device and method of manufacturing the same To provide a piezoelectric single-crystal device which can stably attain an electromechanical coupling factor k31 of 60% or more in the lateral vibration mode and a method of manufacturing the same. Specifically, the piezoelectric single-crystal device ha... | 04/21/2009 |
| 7443082 | Piezoelectric polymer composite article and system The subject invention provides composite articles (20, 120) and associated systems (32, 132). A first composite article (20) includes a piezoelectric layer (22) having a piezoelectric property. The piezoelectric layer (22) is sandw... | 10/28/2008 |
| 7382082 | Piezoelectric transducer with gas matrix A piezoelectric transducer defined by two faces comprises a plurality of piezoelectric cylinders. The axial length and composition of the piezoelectric cylinders determines the frequency of the transducer when excited. The axial ends of the piezoelectric cylinders a... | 06/03/2008 |
| 7353585 | Method of poling ferroelectric materials A method of producing an actuator includes shaping a block of ferroelectric material to provide an active element of the actuator. The element includes a stack of ferroelectric layers with adjacent layers separated by electrodes arranged parallel to end faces of the... | 04/08/2008 |
| 7309947 | Piezoelectric transducer including a plurality of piezoelectric members A piezoelectric transducer for an ultrasonic scan is provided. The transducer includes a plurality of piezoelectric members arrayed. The plurality of piezoelectric members have different compositions parts in a slice direction so that an ultrasonic beam is focused i... | 12/18/2007 |
| 7276838 | Piezoelectric transducer including a plurality of piezoelectric members A piezoelectric transducer for an ultrasonic scan is provided. The transducer includes a plurality of piezoelectric members arrayed. The plurality of piezoelectric members have different compositions parts in a slice direction so that an ultrasonic beam is focused i... | 10/02/2007 |
| 7265483 | Dielectric member, piezoelectric member, ink jet head, ink jet recording apparatus and producing method for ink jet recording apparatus A dielectric member including, on a substrate, a lower electrode, an oriented dielectric layer, and an upper electrode, in which at least either of the electrodes has an at least two-layered structure constituted of perovskite type oxide conductive layers, and has a... | 09/04/2007 |
| 7243551 | Micromechanical component having a sealed cavity and at least two dielectric layers and corresponding method for its manufacture A micromechanical component having a substrate, a cavity formed in the substrate, a membrane provided on the surface of the substrate, which seals the cavity, the membrane having at least two layers between which one or several piezoelectric or piezoresistive circui... | 07/17/2007 |
| 7224106 | Electroactive polymers The present invention relates to transducers, their use and fabrication. The transducers convert between mechanical and electrical energy. Some transducers of the present invention include a pre-strained polymer. The pre-strain improves the conversion between electr... | 05/29/2007 |
| 7215067 | Ferroelectric thin film element, piezoelectric actuator and liquid discharge head A ferroelectric thin film element comprises a substrate and an epitaxial ferroelectric thin film provided on the substrate. The thin film satisfies z/z0>1.003 and 0.997≦x/x0≦1.003, where a crystal face of said thin film parallel to a crysta... | 05/08/2007 |
| 7202592 | Piezoelectric transformer, power supply circuit and lighting unit using the same A piezoelectric transformer includes a piezoelectric ceramic disc having one face and the other face opposite to each other in a thickness direction. A pair of low-impedance portions acting as one of a driving portion and a generator portion are disposed in the piez... | 04/10/2007 |
| 7199501 | Electroactive polymers The present invention relates to transducers, their use and fabrication. The transducers convert between mechanical and electrical energy. Some transducers of the present invention include a pre-strained polymer. The pre-strain improves the conversion between electr... | 04/03/2007 |
| 7197798 | Method of fabricating a composite apparatus A method for fabricating a piezoelectric macro-fiber composite actuator comprises making a piezoelectric fiber sheet by providing a plurality of wafers of piezoelectric material, bonding the wafers together with an adhesive material to form a stack of alternating la... | 04/03/2007 |
| 7199508 | Coaxial flexible piezoelectric cable polarizer, polarizing method, defect detector, and defect detecting method The invention provides a defect inspecting apparatus and a defect detecting method for specifying a position of a defect before polarization when the defect is included in a coaxial flexible piezoelectric member. Further, when a piezoelectric tube is moved in polari... | 04/03/2007 |
| 7194906 | Acceleration sensor having resonators with reduced height A compact, highly sensitive acceleration sensor that is not affected by factors other than acceleration, such as a change in temperature, includes a bimorph acceleration-sensor element including first and second resonators and attached to opposite sides of a base pl... | 03/27/2007 |
| 7191503 | Method of manufacturing a piezoelectric actuator A method for making a piezoelectric actuator comprises coating at least one of a first surface and a second surface of a piezoelectric element with a polyimide adhesive. The piezoelectric element is then heated to dry the adhesive. Afterwards, the piezoelectric elem... | 03/20/2007 |
| 7166952 | Piezoelectric structures An equivalent to the spatial separation either side of a nominal median plane that is inherent in a bimorph (with one piezoelectric layer on one side, and the second on the other side of the plane) is attained by structurally shaping the cross-section of a simple, s... | 01/23/2007 |
| 7161282 | Vibrator support structure and manufacturing method for the support structure In a vibrator support structure, a vibrator is supported on a substrate through support pins, substrate connection portions of the support pins and pin connection portions of the substrate are joined through conductive adhesive which is made of a resin including con... | 01/09/2007 |
| 7134339 | Acceleration sensor A compact, high-sensitivity acceleration sensor that is prevented from being affected by factors other than acceleration, such as a change in temperature, has a bimorph acceleration-sensor element including first and second resonators attached to opposite sides of a... | 11/14/2006 |
| 7117739 | Fluid-gauging probes An ultrasonic fluid-gauging probe has a still well and two or more piezoelectric transducer elements mounted at its lower end. A drive and processor unit may separately energize each element and provide a separate output indicative of fluid height so as to provide r... | 10/10/2006 |
| 7100254 | Method of manufacturing an ink-jet printhead A method of manufacturing a piezoelectric actuator, formed of multiple concave parts which are provided on one surface. First, a first sheet is formed of pliant piezoelectric materials and a second sheet is formed of pliant predetermined materials, forming an upper ... | 09/05/2006 |
| 7084555 | Piezoelectric diaphragm structure with outer edge electrode A multi-electrode piezoelectric diaphragm structure includes a diaphragm, piezoelectric material located on the diaphragm, which is defined as having a first area, and a second area. The first area of the piezoelectric is poled in a first direction, and the second a... | 08/01/2006 |
| 7075217 | Laminated piezoelectric transformer A laminated piezoelectric transformer is provided using the longitudinal vibration modes for step-up voltage conversion applications. The input portions are polarized to deform in a longitudinal plane and are bonded to an output portion. The deformation of the input... | 07/11/2006 |
| 7053532 | Radially poled piezoelectric diaphragm structures In accordance with one embodiment of the present application, a piezoelectric diaphragm structure includes a diaphragm, with a piezoelectric material located on the diaphragm. The piezoelectric material is being poled in a radial direction to the piezoelectric mater... | 05/30/2006 |
| 7042141 | Method of producing lead zirconate titanate-based thin film, dielectric device and dielectric thin film A lead zirconate titanate-based thin film is an epitaxial crystal thin film and has a chemical composition represented by the general formula Pb1-xLnxZryTi1-yO3 (wherein Ln represents any one selected from the g... | 05/09/2006 |
| 7038356 | Mechanical-to-acoustical transformer and multi-media flat film speaker A mechanical-to-acoustical transducer has at least one actuator, preferably a piezo motor, that is coupled, generally perpendicularly, to one edge of a diaphragm formed from a thin, flexible sheet material. The diaphragm is fixed at a point spaced from the actuator ... | 05/02/2006 |
| 7003125 | Micromachined piezoelectric microspeaker and fabricating method thereof A micromachined piezoelectric microspeaker and its fabricating method are disclosed. The micromachined piezoelectric microspeaker comprises a diaphragm and a plurality of contact pads. The diaphragm comprises an active area which is flat, and a non-active area which... | 02/21/2006 |
| 6993812 | Method of manufacturing the piezoelectric transducer Inner individual electrodes are formed at intervals on a piezoelectric ceramic layer so as to correspond in a one-to-one relationship with ink channels, and an inner common electrode are formed on another piezoelectric ceramic layer. The required number of piezoelec... | 02/07/2006 |
| 6974397 | Racket with self-powered piezoelectric damping system According to one embodiment of the invention, a sports racket includes a racket frame comprising a head portion, handle portion and a throat portion joining the head portion to the handle portion. The racket frame also comprises a self-powered piezoelectric damping ... | 12/13/2005 |
| 6975183 | BAW resonator having piezoelectric layers oriented in opposed directions A BAW resonator includes a first piezoelectric layer made of a material oriented toward a first direction, and a second piezoelectric layer made of a material oriented toward a second direction which is opposed to the first direction. The first piezoelectric layer a... | 12/13/2005 |
| 6943485 | Piezoelectric actuator, liquid jetting head and liquid jetting device using the same It is an object of the present invention to provide a piezoelectric actuator which uses strontium ruthenate as the material of the bottom electrode, and which uses PMN-PT as the material of the piezoelectric layer. This piezoelectric actuator comprises a base layer ... | 09/13/2005 |
| 6936954 | Bulk resonator A resonator having temperature and electronic compensation. The resonator has several layers on a substrate having opposite thermal coefficients of the sound velocity for temperature compensation. Also, the frequency of the resonator is adjusted in accordance with a... | 08/30/2005 |
| 6924588 | Piezoelectric crystal material and piezoelectric resonator In a gallium phosphate crystal, a crystallographic Y-axis and a Z-axis that have been rotated about an X-axis counterclockwise through an angle α is referred to as a Y′-axis and a Z′-axis, respectively, where the angle α is in a range from 10° to 20°. A piez... | 08/02/2005 |
| 6919669 | Electro-active device using radial electric field piezo-diaphragm for sonic applications An electro-active transducer for sonic applications includes a ferroelectric material sandwiched by first and second electrode patterns to form a piezo-diaphragm coupled to a mounting frame. When the device is used as a sonic actuator, the first and second electrode... | 07/19/2005 |
