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| Number | Title | Issue Date |
| 8084926 | At cut quartz crystal resonator element and method for manufacturing the same An AT cut quartz crystal resonator element includes a quartz crystal element piece having an exciting part formed from an AT cut quartz crystal plate in a rectangular shape having an X-axis direction of a quartz crystal set to a long side, and an exciting electrode ... | 12/27/2011 |
| 8026652 | Quartz crystal resonator element, quartz crystal device, and method for producing quartz crystal resonator element A quartz crystal resonator element includes an AT-cut quartz crystal substrate, the substrate having edges parallel to each of a Z″ axis obtained by rotating a Z′ axis in a range of −120° to +60° about a Y′ axis and an X′ axis perpendicular to the Z″ a... | 09/27/2011 |
| 7863802 | Quartz crystal element made of double-rotation Y-cut quartz crystal plate A crystal element has a crystal blank which is cut from a crystal of quartz and has a principal plane orthogonal to a Y″-axis, where the Y- and Z-axes are rotated by an angle of α around the X-axis in the crystal to be designated as the Y′- and Z′-axes, and t... | 01/04/2011 |
| 7830074 | Integrated quartz oscillator on an active electronic substrate An oscillator having a quartz resonator, and a base wafer containing active electronics, wherein the quartz resonator is bonded directly to the base wafer and subsequently hermetically capped. ... | 11/09/2010 |
| 7705524 | SC cut crystal resonator The outer shape of a quartz crystal blank is processed to have a predetermined shape, thereby providing an SC cut crystal resonator capable of reliably and reproducibly suppressing B mode resonance. In this SC cut crystal resonator, the surface of the quartz crystal... | 04/27/2010 |
| 7696675 | Surface acoustic wave device and electronic apparatus A surface acoustic wave device includes: a quartz substrate; and at least a single-type IDT electrode provided on a surface of the quartz substrate for exciting a Rayleigh surface acoustic wave in the upper limit mode of the surface acoustic wave stop band with the ... | 04/13/2010 |
| 7608987 | AT cut quartz crystal resonator element and method for manufacturing the same An AT cut quartz crystal resonator element includes a quartz crystal element piece having an exciting part formed from an AT cut quartz crystal plate in a rectangular shape having an X-axis direction of a quartz crystal set to a long side, and an exciting electrode ... | 10/27/2009 |
| 7518294 | Manufacturing method of quartz crystal resonator, apparatus therefor, and quartz crystal resonator manufactured thereby By applying a laser beam that is absorbed into a quartz crystal to an upper right end of a crystal chip, the height of the crystal chip is altered step by step to form a first step, a second step, a third step, and a fourth step, respectively. As such, control of th... | 04/14/2009 |
| 7378916 | Crystal oscillator device, oscillation method and heater The crystal oscillator device for simultaneously generating oscillator signals with a plurality of oscillation modes of a crystal unit, comprising: a primary resonator unit filtering the oscillator signal with a primary oscillation mode, which is one of the oscillat... | 05/27/2008 |
| 7352104 | Surface acoustic wave element, method of manufacturing the same and surface acoustic wave device A surface acoustic wave element is provided including an IDT and reflectors provided on both sides of the IDT that are on a surface of a quartz plate. The quartz plate is made from an in-plane rotated ST cut quartz plate whose cutting angle is expressed as (0°, 113... | 04/01/2008 |
| 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 |
| 7327070 | Lamb-wave high-frequency resonator A Lamb-wave high-frequency resonator includes a comb-shaped IDT electrode for exciting a Lamb wave on one main surface of a quartz substrate. The IDT electrode is formed such that the cut angle of the quartz substrate and the direction of propagation of the Lamb wav... | 02/05/2008 |
| 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 |
| 7269306 | Actuator arrangement for excitation of flexural waves on an optical fiber A system for exciting flexural waves on an optical fiber (102) is provided. The system includes a substrate (114, 118), an actuator (106), and a mechanical optical fiber coupling (104). The actuator is formed of an electromechanical trans... | 09/11/2007 |
| 7243549 | Acoustic wave lubricity sensor A lubricity sensor includes a flexural plate wave device and a face shear mode bulk acoustic wave device, which is associated with and located proximate to the flexural plate wave device. The face shear mode bulk acoustic wave device and the flexural plate wave devi... | 07/17/2007 |
| 7212075 | Downhole clock having temperature compensation A downhole crystal-based clock that is substantially insensitive to the factors that may cause frequency deviation as a result of downhole temperature. The clock may include a plurality of crystals, where a first crystal may be more stable, with respect to temperatu... | 05/01/2007 |
| 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 |
| 7170218 | Electronic apparatus with two quartz crystal oscillators utilizing different vibration modes The electronic apparatus comprises a display portion and a quartz crystal oscillator at least, and said electronic apparatus comprises at least two quartz crystal oscillators. Also, each of two quartz crystal oscillators of the at least two oscillators comprises a q... | 01/30/2007 |
| 7157983 | Cut of piezoelectric oscillator, piezoelectric oscillator, and piezoelectric device A cut of a piezoelectric resonator uses a quartz plate having an electric axis, mechanical axis, and optic axis on an X axis, Y axis, and Z axis, respectively. An X′ axis is set by rotating the X axis with an angle of 3–30 degrees in a clockwise direction about ... | 01/02/2007 |
| 7129624 | Crystal unit A crystal unit comprises an AT-cut crystal blank, and an excitation electrode formed on each of opposing main surfaces of the crystal blank in an oscillation region of the crystal blank. The ratio b/a is 0.014 or less, and preferably 0.012 or less where a represents... | 10/31/2006 |
| 7071794 | Quartz crystal resonator, unit having resonator, oscillator having unit, electronic apparatus having oscillator, and method for manufacturing electronic apparatus A quartz crystal resonator has a quartz crystal tuning fork base and quartz crystal tuning fork tines connected to the quartz crystal tuning fork base. Each of the quartz crystal tuning fork tines has opposite main surfaces, a groove formed in at least one of the ma... | 07/04/2006 |
| 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 |
| 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 |
| 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 |
| 7000298 | Method a quartz sensor A quartz sensor method and system are disclosed in which a plurality of SAW sensing resonators can be mechanically simulated for implementation upon a quartz wafer substrate. The quartz wafer substrate can thereafter be appropriately etched to produce a quartz diaph... | 02/21/2006 |
| 6976295 | Method of manufacturing a piezoelectric device A compact and thin piezo-electric resonator is provided having a high air-tightness and available at a low cost, in which a piezo-electric resonator element is provided in a housing having a structure which permits adjustment of the frequency after sealing the housi... | 12/20/2005 |
| 6959472 | Method for manufacturing quartz crystal oscillator In a method for manufacturing a quartz crystal oscillator, at least one of a chemical etching method, a physical etching method, and a mechanical method is utilized to form a quartz crystal tuning fork resonator having a quartz crystal tuning fork base, quartz cryst... | 11/01/2005 |
| 6952074 | Piezoelectric device and acousto-electric transducer and method for manufacturing the same A lens shape piezoelectric device which is thinner than the manufacture limit thickness, which is conventionally difficult to manufacture, and a method for manufacturing the same. The piezoelectric device has a oscillation part having at least two steps where one si... | 10/04/2005 |
| 6946930 | Surface acoustic wave device and electronic device using the same A reliable SAW device has excellent reflection and a small size, which is achieved by reducing the number of fingers defining reflectors, such that losses due to a large electromechanical coupling coefficient are small and the film thickness of electrodes has much l... | 09/20/2005 |
| 6911765 | Quartz crystal tuning fork resonator A quartz crystal tuning fork resonator has quartz crystal tuning fork tines for undergoing vibration in an inverse phase. Each of the quartz crystal tuning fork tines has a first main surface and a second main surface opposite the first main surface, each of the fir... | 06/28/2005 |
| 6897737 | Vibrating reed, vibrator, oscillator, and electronic device A vibrating reed which includes a base; and a vibration arm section formed so as to protrude from this base wherein a through groove is formed in the vibration arm section, and a rigidity reinforcing section is provided in the through groove, and thus the frequency ... | 05/24/2005 |
| 6849991 | Quartz resonating piece, quartz resonator, and quartz device The invention provides a stabilized frequency characteristic over a wide temperature range. A quartz resonating piece is provided such that an electrical axis of quartz corresponds to an X axis, a mechanical axis of the quartz corresponds to a Y axis, and an optical... | 02/01/2005 |
| 6791243 | Quartz crystal unit and its manufacturing method A quartz crystal unit has a quartz crystal tuning fork resonator capable of vibrating in a flexural mode, a case for housing the quartz crystal tuning fork resonator, and a lid for covering an open end of the case. The quartz crystal tuning fork resonator has a tuni... | 09/14/2004 |
| 6784763 | Longitudinally coupled multi-mode piezoelectric bulk wave filter and electronic components using the same In a longitudinally coupled multi-mode piezoelectric bulk wave filter, a laminated piezoelectric body obtained by overlapping a plurality of excitation electrodes with piezoelectric layers therebetween and piezoelectric portions aligned with the laminated piezoelect... | 08/31/2004 |
| 6777854 | 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... | 08/17/2004 |
| 6744182 | 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 = 3.9 ... | 06/01/2004 |
