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| Number | Title | Issue Date |
| 8148878 | Piezoelectric element and gyroscope A piezoelectric element having a crystal structure that enables a piezoelectric film to be formed in an unstressed state is provided. The piezoelectric film contains an a-axis oriented crystal and a c-axis oriented crystal, where a difference in lattice constant bet... | 04/03/2012 |
| 7973457 | Crystal Unit A double rotation Y-cut crystal unit includes a crystal element, which is respectively rotated by an angle θ° and an angle φ° in a counterclockwise direction centering on an X axis and a Z axis of crystal axes (X, Y, Z), which principal surface is perpendicular ... | 07/05/2011 |
| 7608986 | Quartz crystal resonator A quartz crystal resonator includes a quartz crystal resonator element having a main surface including an X axis (electrical axis) and a Z′ axis of an inclination rotated at an angle (y) equal to or greater than 36.4 degrees and equal to or smaller than, 40.5 degr... | 10/27/2009 |
| 7528532 | Piezoelectric substance and manufacturing method thereof, piezoelectric element and liquid discharge head using such piezoelectric element and liquid discharge apparatus The present invention provides a piezoelectric substance of single crystal or uniaxial crystal type in which three lattice lengths a, b and c of a unit lattice of the piezoelectric substance are smaller than lattice length a0, b0 and c0 | 05/05/2009 |
| 7423501 | Film bulk acoustic wave resonator and manufacturing method thererof A film bulk acoustic resonator includes a substrate; a lower electrode formed on top of the substrate; a piezoelectric membrane formed on top of the lower electrode and having a crystallographic axis so inclined as to generate a total reflection when an acoustic wav... | 09/09/2008 |
| 7422807 | Potassium niobate deposited body and method for manufacturing the same, piezoelectric thin film resonator, frequency filter, oscillator, electronic circuit, and electronic apparatus A method for manufacturing a potassium niobate deposited body includes: forming a buffer layer above a substrate composed of an R-plane sapphire substrate; forming above the buffer layer a potassium niobate layer or a potassium niobate solid solution layer that epit... | 09/09/2008 |
| 7373260 | Sensor infrastructure A device for use in detecting an event in a structure includes a sensor encapsulation, the encapsulation containing a sensor, an actuator positioned substantially in-plane to the sensor within the housing and a printed circuit board in communication with at least on... | 05/13/2008 |
| 7345408 | Potassium niobate deposited body and method for manufacturing the same, piezoelectric thin film resonator, frequency filter, oscillator, electronic circuit, and electronic apparatus A potassium niobate deposited body includes an R-plane sapphire substrate, a buffer layer composed of a metal oxide and formed above the R-plane sapphire substrate, a lead zirconate titanate niobate layer formed above the buffer layer, a potassium niobate layer or a... | 03/18/2008 |
| 7336016 | Surface-acoustic wave device and method of manufacturing same A new surface acoustic wave device in which higher frequency can be achieved and that shows enhanced temperature characteristics, is provided in a surface acoustic wave device utilizing an SH type high speed surface wave, when an IDT electrode is formed on a quartz ... | 02/26/2008 |
| 7335336 | Sensor array using lateral field excited resonators A sensor for sensing a property of a plurality of analytes includes a substrate having a resonant frequency that varies based on contact with a predetermined property of an analyte. The substrate has an analyte contact surface and a non-analyte contact surface locat... | 02/26/2008 |
| 7328497 | Incremental tuning process for electrical resonators based on mechanical motion A method is provided for adjusting the resonant frequency of a mechanical resonator whose frequency is dependent on the overall resonator thickness. Alternating selective etching is used to remove distinct adjustment layers from a top electrode. One of the electrode... | 02/12/2008 |
| 7323805 | Piezoelectric thin film device and method for manufacturing the same A piezoelectric thin film device includes an amorphous metal film disposed on a substrate and a piezoelectric film disposed on the amorphous metal. One of crystal axis of the piezoelectric film is aligned in a direction perpendicular to a surface of the amorphous me... | 01/29/2008 |
| 7315107 | Surface acoustic wave device A surface acoustic wave device includes a LiNbO3 substrate with a Euler angle in an area defined by a rectangle having four corners with coordinates (1) (0°, 7°, 101°), (2) (0°, 23°, 79°), (3) (0°, 23°, 79°), and (4) (0°, 7°, 79°), for example... | 01/01/2008 |
| 7312558 | Piezoelectric element, ink jet head, angular velocity sensor, and ink jet recording apparatus In a piezoelectric element, a cubic or tetragonal orientation control layer (15) is provided on a first electrode layer (14), and formed on the orientation control layer (15) is a piezoelectric layer (16) having a rhombohedral or tetragon... | 12/25/2007 |
| 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 |
| 7265482 | Potassium niobate deposited body and method for manufacturing the same, surface acoustic wave device, frequency filter, oscillator, electronic circuit, and electronic apparatus A potassium niobate deposited body includes an R-plane sapphire substrate, a buffer layer composed of a metal oxide and formed above the R-plane sapphire substrate, a lead zirconate titanate niobate layer formed above the buffer layer, and a potassium niobate layer ... | 09/04/2007 |
| 7245060 | Piezoelectric resonator, method for manufacturing the same, piezoelectric filter, and duplexer A piezoelectric resonator suitable for use in a high frequency band is provided, in which variation in the piezoelectric material is reduced, variation in performance is reduced, and production can be performed without the need for a polarization treatment step. In ... | 07/17/2007 |
| 7243471 | Friction stir welding method, and hollow shape member for friction stir welding Face plates 11 and 12 of a hollow shape member 10 are abutted against face plates 21 and 22 of a hollow shape member 20. Grooves 18 formed to said face plates 11 and 12 at the abutted region receive proj... | 07/17/2007 |
| 7242133 | Method for production of a mechanical resonator with a planar monolithic vibrating structure machined in a crystalline material and resonator produced thus The invention relates to the production of a mechanical resonator with a planar monolithic vibrating structure machine in a crystalline material. Where the material is trigonal (1), trigonal (2) or hexagonal in structure, said material is cut in the [001] plane or, ... | 07/10/2007 |
| 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 |
| 7193756 | Piezoelectric element, method for fabricating the same, inkjet head, method for fabricating the same, and inkjet recording apparatus A piezoelectric element includes a first electrode film; a piezoelectric layered film including a first piezoelectric thin film formed on the first electrode film and a second piezoelectric thin film formed on the first piezoelectric thin film; and a second electrod... | 03/20/2007 |
| 7185540 | Piezoelectric element, ink jet head, angular velocity sensor, method for manufacturing the same, and ink jet recording apparatus In a piezoelectric element 20, a first electrode layer 2 made of an alloy of at least one metal selected from the group consisting of cobalt, nickel, iron, manganese and copper and a noble metal is formed on a silicon substrate 1, and a piezoele... | 03/06/2007 |
| 7180222 | Surface acoustic wave device A surface acoustic wave device includes a LiNbO3 substrate with a Euler angle in an area defined by a rectangle having four comers with coordinates (1) (0°, 7°, 101°), (2) (0°, 23°, 79°), (3) (0°, 23°, 79°), and (4) (0... | 02/20/2007 |
| 7114797 | Actuator device, liquid ejection head, and method of inspecting the same A substrate is formed with a pressure generating chamber. A vibration plate is joined to the substrate so as to form a part of the pressure generating chamber. A first piezoelectric element is disposed on a part of the vibration plate facing the pressure generating ... | 10/03/2006 |
| 7075216 | Lateral field excited acoustic wave sensor An acoustic wave sensor having a piezoelectric substrate shaped to generate lateral electric fields. The sensor has a pair of electrodes deposited upon a reference surface of the substrate. A sensing surface that is opposite from the reference surface is adapted to ... | 07/11/2006 |
| 7066026 | Underwater acoustic vector sensor using transverse-response free, shear mode, PMN-PT crystal The present invention is directed to an acoustic vector sensor, also called particle velocity sensor. direction poled, shear mode, relaxor single crystals are used as the sensing elements. In addition, these crystal plates are cut at a special orientation such... | 06/27/2006 |
| 7051728 | Piezoelectric quartz plate and method of cutting same A piezoelectric quartz plate having reduced frequency deviation as a function of temperature, wherein the quartz plate is cut at an angle described by: T f... | 05/30/2006 |
| 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 |
| 7042133 | Surface acoustic wave device and method of adjusting a temperature characteristic of the same The invention miniaturizes a surface acoustic wave device on which a plurality of surface acoustic wave elements are disposed and connected together in parallel on a plate, and provides a good temperature characteristic in a wide temperature range. A surface acousti... | 05/09/2006 |
| 7038359 | Piezoelectric resonator and the method for making the same The present invention provides a method for making high-frequency piezoelectric resonators so that constants of the resonator can be measured precisely. A cavity is formed at a central section of an AT-cut crystal substrate. Two grooves are formed at predetermined d... | 05/02/2006 |
| 7019444 | Method of adjusting temperature properties of piezoelectric devices and oscillation circuits A method of adjusting the temperature properties of piezoelectric devices and oscillation circuits which have a third-order function temperature property and the point of inflection of the third-order function temperature property outside the normal usage temperatur... | 03/28/2006 |
| 7015624 | Non-uniform thickness electroactive device An electroactive device comprises at least two layers of material, wherein at least one layer is an electroactive material and wherein at least one layer is of non-uniform thickness. The device can be produced in various sizes, ranging from large structural actuator... | 03/21/2006 |
| 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 |
| 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 |
| 7009468 | Surface acoustic wave device and electronic device using the same A small, high-performance SAW device has a large electromechanical coupling coefficient and a small number of fingers constituting reflectors, and is constructed such that losses due to electric resistance of the fingers. In the SAW device having pluralities of firs... | 03/07/2006 |
| 6999221 | Bimorphic polymeric photomechanical actuator A bimorphic polymeric photomechanical actuator, in one embodiment using polyvinylidene fluoride (PVDF) as a photosensitive body, transmitting light over fiber optic cables, and controlling the shape and pulse duration of the light pulse to control movement of the ac... | 02/14/2006 |
| 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 |
| 6979936 | Piezoelectric motors and motor driving configurations A piezoelectric motor comprising: a layer of piezoelectric material having narrow edge surfaces and first and second large face surfaces, formed with at least three arms, each extending radially outward from a common central region and terminating in an end; and at ... | 12/27/2005 |
| 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 |
| 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 |
