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| Number | Title | Issue Date |
| 8174170 | Methods and apparatus for mechanical resonating structures Mechanical resonating structures and related methods are described. The mechanical resonating structures may provide improved efficiency over conventional resonating structures. Some of the structures have lengths and widths and are designed to vibrate in a directio... | 05/08/2012 |
| 8004164 | Piezoelectric single crystal device In a piezoelectric device that uses a vibration mode in a direction parallel to a polarization direction, a single crystal device that achieves an electromechanical coupling factor of 65% or more, which is more than the electromechanical coupling factor (about 60%) ... | 08/23/2011 |
| 7424771 | Method of producing a piezocomposite A method of preparing a composite sheet unit includes arranging a plurality of sintered piezoelectric thin wires in a uniform direction on a surface of a resin layer is prepared. A plurality of the same are laminated and integrated so that the sintered piezoelectric... | 09/16/2008 |
| 7423363 | Piezoelectric vibrating element and piezoelectric vibrator A piezoelectric vibrating element includes a main vibration section vibrating in a constant direction, an open edge formed at least at one edge among edges provided in a vibration direction of the main vibration section, an outer frame section formed so as to surrou... | 09/09/2008 |
| 7368857 | Piezoelectric resonator element, piezoelectric, resonator, and piezoelectric oscillator Exemplary embodiments provide a piezoelectric resonator element, to reduce the reaching of an attenuating vibration of a main vibration to a marginal edge of the piezoelectric resonator element, as well as to stabilize an oscillating-frequency without worsening the ... | 05/06/2008 |
| 7321185 | Active multistable twisting device Two similarly shaped, such as rectangular, shells are attached to one another such that they form a resulting thin airfoil-like structure. The resulting device has at least two stable equilibrium shapes. The device can be transformed from one shape to another with a... | 01/22/2008 |
| 7312559 | Stator and ceramic tube type ultrasonic motor using the same The present invention relates to a ceramic tube type ultrasonic motor having a stator including a tube-type elastic body that is formed of a ceramic material; and a plurality of piezoelectric diaphragms that are attached on the outer peripheral surface of the elasti... | 12/25/2007 |
| 7309397 | Process for the manufacture of piezoceramic multilayer actuators A block of stacked green films provided with internal electrodes is laminated, at least one actuator is separated from the block, the actuator obtains its shape by means of a machining operation, is then sintered, and the sinter skin produced by the sintering is use... | 12/18/2007 |
| 7304247 | Circuit board with at least one electronic component A circuit board having, between the circuit board and a component arranged thereon, an electrical and mechanical connection of high mechanical-load-bearing ability. The circuit board includes at least one internally situated conductor path, a first insulating layer ... | 12/04/2007 |
| 7301258 | Piezoelectric resonator element, piezoelectric resonator, and piezoelectric oscillator Aspects of the invention provide piezoelectric resonator element having a plurality of grooves for suppressing propagation of the thickness shear vibration from the center portion to the outer peripheral portion of the main surface being placed in enclosure-like sha... | 11/27/2007 |
| 7235913 | Piezoelectric substrate, piezoelectric resonating element and surface-mount piezoelectric oscillator In the case where an ultraminiature piezoelectric substrate, which has a resonating portion formed by making a concavity by etching in the surface of the piezoelectric substrate made of an anisotropic crystal material, is mass-produced by batch operation using a lar... | 06/26/2007 |
| 7205704 | Valve control device The invention relates to a device for displacing a moving part along a longitudinal axis relative to a housing, said device being symmetrical about a plane extending longitudinally relative to the moving part, the device comprising two structures that are secured to... | 04/17/2007 |
| 7199510 | Quartz crystal unit A crystal unit for high frequency use includes: a crystal blank having a central portion that is used as a vibration region and a peripheral portion that surrounds the central portion and that is provided with a greater thickness than the central portion; a pair of ... | 04/03/2007 |
| 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 |
| 7154358 | Film bulk acoustic resonator structure and method of making A film bulk acoustic resonator is formed on a substrate having a major surface. The film bulk acoustic resonator includes an elongated stack. The elongated stack includes a layer of piezoelectric material positioned between a first conductive layer deposited on a fi... | 12/26/2006 |
| 7116040 | Electronic component and filter including the same An electronic component of an embodiment of the present invention comprises a first piezoelectric thin film resonator and a second piezoelectric thin film resonator. The first piezoelectric thin film resonator and second piezoelectric thin film resonator are a piezo... | 10/03/2006 |
| 7098574 | Piezoelectric resonator and method for manufacturing the same In the case where an ultraminiature piezoelectric substrate, which has a resonating portion formed by making a concavity by etching in the surface of the piezoelectric substrate made of an anisotropic crystal material, is mass-produced by batch operation using a lar... | 08/29/2006 |
| 7067964 | Piezoelectric resonator with reduced deformation sensitivity Reliable piezoelectric restraint mechanisms are provided that substantially reduce the ill effects of acceleration sensitivity through an increasingly rigid and precise orientation system. The piezoelectric resonator stress relief apparatus, devices and systems of t... | 06/27/2006 |
| 7053533 | Piezoelectric resonator element of cyrstallographic point group 32 A piezoelectric resonator element of crystallographic point group 32, which can be operated as a thickness shear resonator contacting a carrier medium includes a singly rorated Y-cut (S1,S2) that is essentially rotated through an angle φabout the crys... | 05/30/2006 |
| 7038358 | Electro-active transducer using radial electric field to produce/sense out-of-plane transducer motion An electro-active transducer includes a ferroelectric material sandwiched by first and second electrode patterns. When the device is used as an actuator, the first and second electrode patterns are configured to introduce an electric field into the ferroelectric mat... | 05/02/2006 |
| 7012355 | Crystal unit A crystal unit has a crystal blank having a hole defined in at least one principal surface thereof, the crystal blank having a region of a reduced thickness including the hole, the region serving as a vibrating region, excitation electrodes disposed respectively on ... | 03/14/2006 |
| 7011887 | IT-cut quartz crystal unit An IT-cut quartz crystal unit has a discoidal or a rectangular quartz crystal blank which is cut from a crystal of quartz along a plane perpendicular to the Y-axis of the crystal of the quartz which is rotated over approximately 34° about the X-axis, and further ro... | 03/14/2006 |
| 6992424 | Piezoelectric vibrator ladder-type filter using piezoeletric vibrator and double-mode piezolectric filter A piezoelectric vibrator which uses lithium tantalate as a piezoelectric material and of which main vibration is thickness shear vibration. The thickness direction of the vibrator forms angle of 0°±5° to the X-axis of a single crystal. The longitudinal direction ... | 01/31/2006 |
| 6989626 | Piezoelectric transformer A compact and high-power piezoelectric transformer is realized by using higher order longitudinal extensional mode vibrations and increasing an effective electromechanical coupling factor by a primary electrode which consists of plural electrodes. ... | 01/24/2006 |
| 6979937 | Laser machining of electroactive ceramics Laser beam machining is applied to form arbitrarily shaped electroactive ceramics for transducers (e.g., electromechanical sensors and actuators). One particularly preferred embodiment of the invention comprises machining parallel grooves in a ceramic plate to impro... | 12/27/2005 |
| 6967432 | Piezoelectric shear resonator, composite piezoelectric shear resonator, and piezoelectric resonator component A piezoelectric shear resonator has a substantially rectangular-column piezoelectric element that excites a shear-vibration mode and that has opposing substantially rectangular shear strain surfaces. The shear strain surfaces each have an aspect ratio at which the e... | 11/22/2005 |
| 6940139 | Micromechanical device and method of manufacture thereof A micromechanical switch comprises a substrate, at least one pair of support members fixed to the substrate, at least one pair of beam members placed in proximity and parallel to each other above the substrate, and connected to one of the support members, respective... | 09/06/2005 |
| 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 |
| 6903489 | Piezoelectric resonator, piezoelectric resonator component and method of making the same A first vibrating electrode is provided on a first side of a piezoelectric substrate perpendicular to the thickness direction. A second vibrating electrode is provided on a second side opposite to the first side to face the first vibrating electrode. A first pad and... | 06/07/2005 |
| 6892738 | Apparatus and methods for reducing damage to substrates during megasonic cleaning processes The present invention provides a megasonic cleaning apparatus configured to provide effective cleaning of a substrate without causing damage to the substrate. The apparatus includes a probe having one of a variety of cross-sections configured to decrease the ratio o... | 05/17/2005 |
| 6856073 | Electro-active device using radial electric field piezo-diaphragm for control of fluid movement A fluid-control electro-active device includes a piezo-diaphragm made from a ferroelectric material sandwiched by first and second electrode patterns configured to introduce an electric field into the ferroelectric material when voltage is applied thereto. The elect... | 02/15/2005 |
| 6842087 | Three-terminal filter using area flexural vibration mode A three-terminal filter using the area flexural vibration mode is smaller than filters using the area expansion vibration mode or the length vibration mode, and is easily adjusted to produce a desired frequency by changing the thickness and length of the three-termi... | 01/11/2005 |
| 6836055 | Piezoelectric vibrator and filter using the same A piezoelectric vibrator uses aluminum nitride as piezoelectric material and thickness sliding vibration as the primary vibration. A polarization direction of the primary vibration is along the longitudinal direction of its vibrating element. This vibrator eliminate... | 12/28/2004 |
| 6812623 | Piezoelectric transformer A compact and high-power piezoelectric transformer is realized by using higher order longitudinal extensional mode vibrations and increasing an effective electromechanical coupling factor by a primary electrode which consists of plural electrodes. ... | 11/02/2004 |
| 6800988 | Voltage and light induced strains in porous crystalline materials and uses thereof A piezoelectric device is disclosed, which includes a first element of porous crystalline material, a second element being attached to, or integrally formed with, the first element, and at least one electrode being in electrical contact with the first element, such ... | 10/05/2004 |
| 6798116 | Piezoelectric resonator and manufacturing method thereof A method for producing an energy trap piezoelectric resonator which operates in a thickness longitudinal vibration mode and which includes a piezoelectric member and first and second vibrating electrodes disposed on respective major surfaces of the piezoelectric mem... | 09/28/2004 |
| 6764609 | Piezoelectric ceramic composition and piezoelectric element using the same A piezoelectric ceramic composition is provided, which includes a ceramic composition expressed by a general formula: Sr1-x-yM1xM2yBi2(Nb1-aTaa)2-zTizO9, wherein M1 is... | 07/20/2004 |
| 6739575 | Piezoelectric valve system A valve system having a valve operated by a piezoelectric device to control the flow of fluid through the valve system. Movement of the valve is controlled by a pre-stressed bender actuator that changes its shape by deforming in opposite axial directions in response... | 05/25/2004 |
| 6734606 | Piezoelectric ceramic composition and piezoelectric ceramic element using the same A piezoelectric ceramic composition includes a bismuth layered compound containing Sr, Bi, Nb and a metal element other than Bi having a valence of 3. The bismuth layered compound satisfies the relational expressions: 0.275 | 05/11/2004 |
| 6719266 | Piezoelectric valve system A valve system having a valve operated by a piezoelectric device to control the flow of fluid through the valve system. Movement of the valve is controlled by a pre-stressed bender actuator that changes its shape by deforming in opposite axial directions in response... | 04/13/2004 |
