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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 8436516 | Resonator device including electrode with buried temperature compensating layer An acoustic resonator device includes a composite first electrode on a substrate, a piezoelectric layer on the composite electrode, and a second electrode on the piezoelectric layer. The first electrode includes a buried temperature compensating layer having a posit... | 05/07/2013 |
| 8421314 | Composite substrate, elastic wave device using the same, and method for manufacturing composite substrate A composite substrate is provided, including a piezoelectric substrate which is capable of transmitting an elastic wave, and a support substrate, which has a smaller thermal expansion coefficient than that of the piezoelectric substrate, bonded to each other. The in... | 04/16/2013 |
| 8405283 | Flexural vibration piece and oscillator using the same A flexural vibration piece includes a flexural vibrator that has a first region on which a compressive stress or a tensile stress acts due to vibration and a second region having a relationship in which a tensile stress acts thereon when a compressive stress acts on... | 03/26/2013 |
| 8362675 | Mechanical resonating structures including a temperature compensation structure Mechanical resonating structures are described, as well as related devices and methods. The mechanical resonating structures may have a compensating structure for compensating temperature variations. ... | 01/29/2013 |
| 8232707 | Flexural vibration piece and oscillator using the same A flexural vibration piece includes a flexural vibrator that has a first region on which a compressive stress or a tensile stress acts due to vibration and a second region having a relationship in which a tensile stress acts thereon when a compressive stress acts on... | 07/31/2012 |
| 8134283 | Vibrating element and vibrator A vibrating element includes: a vibrating body having frequency temperature dependency; and a temperature characteristic correcting part provided on a surface of the vibrating body. The temperature characteristic correcting part has a temperature characteristic of a... | 03/13/2012 |
| 8098001 | Component with reduced temperature response, and method for production A component has a substrate and a compensation layer. A lower face of the substrate is mechanically firmly connected to the compensation layer. The lower face of the substrate and the upper face of the compensation layer have a topography. ... | 01/17/2012 |
| 8004159 | Piezoelctric actuator, method of manufacturing same, and liquid ejection head The piezoelectric actuator comprises: a supporting substrate; a thermal stress controlling layer which is formed on the supporting substrate; and a piezoelectric body which is formed as a film onto the thermal stress controlling layer on the supporting substrate at ... | 08/23/2011 |
| 8004158 | Method and device for cooling ultrasonic transducers The invention relates to a method and a device for cooling ultrasonic transducers. The inventive device is characterised in that it consists of at least one piezo stack (4) and at least two cylindrical transducer bodies (5), which together with the pie... | 08/23/2011 |
| 7965019 | Device comprising a piezoacoustic resonator element and integrated heating element, method for producing the same and method for outputting a signal depending on a resonant frequency A device includes at least one piezoacoustic resonator element (21-29) having at least one piezoelectric layer (21a-29a) and two electrodes (21b-29b, 21c-29c) applied t... | 06/21/2011 |
| 7956517 | MEMS structure having a stress inverter temperature-compensated resonator member A MEMS structure having a temperature-compensated resonator member is described. The MEMS structure comprises an asymmetric stress inverter member coupled with a substrate. A resonator member is housed in the asymmetric stress inverter member and is suspended above ... | 06/07/2011 |
| 7944124 | MEMS structure having a stress-inducer temperature-compensated resonator member A MEMS structure having a stress-inducer temperature-compensated resonator member is described. The MEMS structure includes a frame disposed above a substrate. The frame has an inner surface and an outer surface and is composed of a first material having a first coe... | 05/17/2011 |
| 7902728 | Thermally enhanced piezoelectric element A system and method for removing unwanted heat generated by a piezoelectric element of an ultrasound transducer. Some implementations have high thermal conductivity (HTC) material placed adjacent to the piezoelectric element. The HTC material can be thermally couple... | 03/08/2011 |
| 7868522 | Adjusted frequency temperature coefficient resonator A temperature compensated pair of resonators. The temperature compensated pair of resonators comprises a first resonator configured to resonate at a first frequency and having a first frequency temperature coefficient and a second resonator configured to resonate at... | 01/11/2011 |
| 7834524 | Micro-electromechanical devices having variable capacitors therein that compensate for temperature-induced frequency drift in acoustic resonators Micro-electromechanical devices include a temperature-compensation capacitor and a thin-film bulk acoustic resonator having a first terminal electrically coupled to an electrode of the temperature-compensation capacitor. The temperature-compensation capacitor includ... | 11/16/2010 |
| 7808160 | Piezoactuator, method for producing a piezoactuator and injection system of said piezoactuator A piezoactuator for injecting fuel with a predetermined fuel pressure has an at least laterally narrowing casing around the internal space of the actuator which has a first temperature- and/or pressure-dependent volume change, a piezo stack located in the internal s... | 10/05/2010 |
| 7759843 | Highly stable piezoelectric oscillator, manufacturing method thereof, piezoelectric resonator storage case, and heat source unit A piezoelectric resonator storage case, includes a piezoelectric resonator stored therein, and a resonator container for storing a metal case. Here, the piezoelectric resonator includes: a piezoelectric resonator body having the metal case and a piezoelectric resona... | 07/20/2010 |
| 7714483 | Fuel injector having piezoelectric actuator with preload control element and method A fuel injector includes a piezoelectric actuator subassembly having a casing and a piezoelectric element disposed within the casing. The piezoelectric element has an operating temperature range and includes a thermally contractive material having a negative thermal... | 05/11/2010 |
| 7652412 | Piezoelectric actuator, method of manufacturing same, and liquid ejection head The piezoelectric actuator comprises: a supporting substrate; a thermal stress controlling layer which is formed on the supporting substrate; and a piezoelectric body which is formed as a film onto the thermal stress controlling layer on the supporting substrate at ... | 01/26/2010 |
| 7569976 | Piezo-electric substrate and manufacturing method of the same A piezo-electric substrate is mainly comprised of a base material and a film formed on one main surface of the base material. In the base material, the main surface on which the film is formed is a roughed main surface. The piezo-electric substrate is obtained by fo... | 08/04/2009 |
| 7564174 | Acoustic wave device and filter An acoustic wave device includes a piezoelectric substrate, a first dielectric film provided on the piezoelectric substrate, electrodes that are provided on the first dielectric film and excite an acoustic wave, and a second dielectric film that is provided so as to... | 07/21/2009 |
| 7557492 | Thermal expansion matching for acoustic telemetry system Thermal expansion matching for an acoustic telemetry system. An acoustic telemetry system includes at least one electromagnetically active element and a biasing device which reduces a compressive force in the element in response to increased temperature. A method of... | 07/07/2009 |
| 7514853 | MEMS structure having a stress inverter temperature-compensated resonating member A MEMS structure having a temperature-compensated resonating member is described. The MEMS structure comprises a stress inverter member coupled with a substrate. A resonating member is housed in the stress inverter member and is suspended above the substrate. The ME... | 04/07/2009 |
| 7486006 | Piezoelectric resonator having improved temperature compensation and method for manufacturing same A piezoelectric resonator includes a piezoelectric layer having a first resonance frequency temperature coefficient of a first sign, a first and a second electrode, the piezoelectric layer being arranged between the first and second electrodes, and a compensation la... | 02/03/2009 |
| 7414349 | Piezoelectric vibrator, filter using the same and its adjusting method A piezoelectric vibrator has a laminated structure where silicon oxide films having substantially the same thickness are disposed at both faces of piezoelectric plate as dielectric films. Using the structure discussed above, because dielectric films are formed at th... | 08/19/2008 |
| 7411473 | Elastic boundary wave device An elastic boundary wave device includes an IDT including laminated conductor layers disposed between a first medium and a second medium, wherein a plane that divides the IDT in half in the thickness direction defines an interface, the energy of an elastic boundary ... | 08/12/2008 |
| 7408428 | Temperature-compensated film bulk acoustic resonator (FBAR) devices The temperature-compensated film bulk acoustic resonator (FBAR) device comprises an FBAR stack. The FBAR stack comprises an FBAR and a temperature-compensating element. The FBAR is characterized by a resonant frequency having a temperature coefficient, and comprises... | 08/05/2008 |
| 7397165 | Surface wave resonator with reduced acceleration sensitivity A restrained surface wave resonator with reduced or abated acceleration sensitivity is provided with a stiffening layer, adhesive layers and subsurface horizontal indentations on the substrate to achieve reduced acceleration sensitivity, increased structural rigidit... | 07/08/2008 |
| 7378780 | Surface mount type crystal oscillator A surface mount type crystal oscillator includes: a container body composed of a laminated ceramic including a plate-shaped center layer, and first and second frame layers stacked on opposite surfaces of the center layer respectively; a crystal blank hermetically se... | 05/27/2008 |
| 7362198 | Pass bandwidth control in decoupled stacked bulk acoustic resonator devices The decoupled stacked bulk acoustic resonator (DSBAR) device has a lower film bulk acoustic resonator (FBAR), an upper FBAR stacked on the lower FBAR, and an acoustic decoupler between the FBARs. Each of the FBARs has opposed planar electrodes and a layer of piezoel... | 04/22/2008 |
| 7358831 | Film bulk acoustic resonator (FBAR) devices with simplified packaging The encapsulated film bulk acoustic resonator (FBAR) device comprises a substrate, an FBAR stack over the substrate, an element for acoustically isolating the FBAR stack from the substrate, encapsulant covering the FBAR stack, and an acoustic Bragg reflector between... | 04/15/2008 |
| 7332985 | Cavity-less film bulk acoustic resonator (FBAR) devices The film bulk acoustic resonator (FBAR) device comprises a substrate, an acoustic Bragg reflector over the substrate, a piezoelectric element over the acoustic Bragg reflector, and a remote-side electrode over the piezoelectric element. The acoustic Bragg reflector ... | 02/19/2008 |
| 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 |
| 7323953 | Film bulk acoustic resonator and method of producing the same A film bulk acoustic resonator includes: a piezoelectric thin film that is formed on a principal surface of a substrate; and a lower electrode and an upper electrode that are arranged to sandwich the piezoelectric thin film. In this film bulk acoustic resonator, the... | 01/29/2008 |
| 7299529 | Film bulk acoustic resonator (FBAR) process using single-step resonator layer deposition A process comprising, in a vacuum, depositing a bottom electrode layer and a piezoelectric layer over a cavity in a substrate, the cavity being filled with a sacrificial material, patterning and etching the piezoelectric layer and the bottom electrode layer to expos... | 11/27/2007 |
| 7298068 | Materials of active-piston actuators The invention concerns an actuator that includes an active piston, an inner sliding cylinder and an outer cylinder in which the said sliding cylinder is pre-stressed, where one of the cylinders is in a material with a negative thermal expansion coefficient or one th... | 11/20/2007 |
| 7290993 | Piezoelectric devices and methods and circuits for driving same A drive circuit (18) produces a drive signal having a waveform of a predetermined waveform shape for a device (10) having a piezoelectric actuator (14). The drive circuit (14) includes a memory (140) which stores waveform shape dat... | 11/06/2007 |
| 7287965 | Piezoelectric devices and methods and circuits for driving same A drive circuit (18) produces a drive signal for a pump (10) having a piezoelectric actuator (14), with the piezoelectric actuator (14) forming a part of the drive circuit (18) and serving to shape a waveform of the drive signal. T... | 10/30/2007 |
| 7276994 | Piezoelectric thin-film resonator, piezoelectric filter, and electronic component including the piezoelectric filter A piezoelectric thin-film resonator includes a supporting substrate. A piezoelectric thin-film is formed on the supporting substrate. A lower electrode and an upper electrode are formed with the piezoelectric thin-film therebetween. The stiffness of at least one of ... | 10/02/2007 |
| 7275292 | Method for fabricating an acoustical resonator on a substrate Method for fabricating an acoustical resonator on a substrate having a top surface. First, a depression in said top surface is generated. Next, the depression is filled with a sacrificial material. The filled depression has an upper surface level with said top surfa... | 10/02/2007 |
