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...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 8183737 | Surface acoustic wave device including electrode fingers partially disposed in grooves in a piezoelectric substrate An elastic wave device has a low temperature coefficient of frequency (TCF), a low insertion loss, a high electromechanical coupling coefficient (k2), and an increased pitch of the electrode fingers. The elastic wave device includes a piezoelectric compon... | 05/22/2012 |
| 8174165 | Surface acoustic wave device and manufacturing method of the same surface acoustic wave device A surface acoustic wave device includes a piezoelectric element, an IDT electrode formed on the piezoelectric element for exciting a principal wave, a reflection film formed on the piezoelectric element having a higher reflectivity than the reflectivity of the piezo... | 05/08/2012 |
| 8169121 | Surface acoustic wave device including electrode fingers partially disposed in grooves in a piezoelectric substrate A surface acoustic wave device has a large electromechanical coupling coefficient, a low insertion loss, and high resistance to static electricity. In the surface acoustic wave device, a piezoelectric substance includes a plurality of grooves. Each electrode finger ... | 05/01/2012 |
| 8143762 | Elastic wave device using SH waves as the principal component An elastic wave device that achieves an improved frequency-temperature characteristic and a sufficiently reduced spurious component includes a piezoelectric body including a LiNbO3 substrate, a first dielectric layer including a SiO2 layer, a s... | 03/27/2012 |
| 8084917 | Surface acoustic wave resonator, surface acoustic wave oscillator, and surface acoustic wave module device A surface acoustic wave resonator includes a piezoelectric substrate and an interdigital transducer (IDT) that includes electrode fingers exciting a surface acoustic wave on the piezoelectric substrate, a first region at a center of the IDT, and a second region and ... | 12/27/2011 |
| 8084918 | Surface acoustic wave device and surface acoustic wave oscillator A surface acoustic wave device, includes: an interdigital transducer serving as an electrode pattern to excite a Rayleigh surface acoustic wave, the interdigital transducer including a comb-tooth-shaped electrode having a plurality of electrode fingers; a piezoelect... | 12/27/2011 |
| 8063534 | Surface acoustic wave device and surface acoustic wave oscillator A surface acoustic wave device, includes: an interdigital transducer serving as an electrode pattern to excite a Rayleigh surface acoustic wave, the interdigital transducer including a comb-tooth-shaped electrode having a plurality of electrode fingers; a piezoelect... | 11/22/2011 |
| 8022594 | Surface acoustic wave device To provide a manufacturing method for a surface acoustic wave device, which makes it possible to easily and reliably connect a piezoelectric element to a substrate having an external connection terminal, and a surface acoustic wave device capable of being made small... | 09/20/2011 |
| 8008837 | Surface acoustic wave device and method of manufacturing the same A surface acoustic wave device excellent in reliability and a method of manufacturing the same are provided. The surface acoustic wave device comprises a piezoelectric substrate (1) for propagating an surface acoustic wave thereon, an IDT (2) formed on... | 08/30/2011 |
| 8004147 | Waveguide components on the basis of acoustic surface waves, and their use The invention relates to waveguide components based on acoustic surface waves, comprising at least one interdigital converter for exciting acoustic surface waves in a piezoelectric substrate or a piezoelectric layer. The object of the invention is to change known wa... | 08/23/2011 |
| 8004148 | Surface acoustic wave element A surface acoustic wave element includes: a diamond layer; an alumina nitride layer provided on the diamond layer; a silicon oxide layer provided on the alumina nitride layer; and a pair of electrodes provided between the alumina nitride layer and the silicon oxide ... | 08/23/2011 |
| 7973449 | Transducer for surface acoustic waves and a resonator and a filter having said transducer A transducer for surface acoustic waves, and a resonator and a filter for surface acoustic waves having the transducer are provided. The transducer for surface acoustic waves has cells containing two electrode fingers per cell, wherein the transducer exhibits unidir... | 07/05/2011 |
| 7956512 | Surface acoustic wave device including an IDT formed by a metal filled in grooves on a piezoelectric substrate A surface acoustic wave device includes a LiNbO3 substrate and is constructed such that the reflection coefficient of an IDT is not only high but the electromechanical coupling coefficient K2 is also high, and the range of Euler angles of the L... | 06/07/2011 |
| 7956511 | Surface acoustic wave device including an IDT formed by a metal filled in grooves on a piezoelectric substrate A surface acoustic wave device includes a LiNbO3 substrate and is constructed such that a reflection coefficient of an IDT is not only high but the electromechanical coupling coefficient K2 is also high, and the range of Euler angles of the LiN... | 06/07/2011 |
| 7939989 | Piston mode acoustic wave device and method providing a high coupling factor An interdigital transducer includes an edge gap length between ends of electrodes and the opposing busbar increased sufficiently for reducing or even eliminating tunneling effects through the gap. As a result, a wave velocity of the acoustic wave within the longitud... | 05/10/2011 |
| 7893597 | Surface acoustic wave element and surface acoustic wave device A surface acoustic wave element 1 includes an IDT electrode 11 having an electrode finger 11a on a piezoelectric substrate 10. The electrode finger 11a is formed by laminating an intermediate layer 12 and an el... | 02/22/2011 |
| 7876021 | Surface acoustic wave device including an IDT defined by a metal filled in grooves in a piezoelectric substrate A surface acoustic wave device includes a LiTaO3 substrate, and an IDT having a high reflection coefficient, which has a relatively high electromechanical coupling coefficient k2, and which can obtain superior resonance characteristics and/or f... | 01/25/2011 |
| 7876020 | Boundary acoustic wave device including idt electrodes including a plurality of conductive layers with different densities A boundary acoustic wave device is capable of reducing insertion loss and the absolute value of the temperature coefficient of frequency (TCF). The boundary acoustic wave device utilizes a boundary acoustic wave propagating along the interface between a piezoelectri... | 01/25/2011 |
| 7863800 | Transducer operating with surface acoustic waves and having four excitation centers A transducer operating with surface acoustic waves is specified, which is divided into cells, whose length essentially equals one wavelength, comprising cells of the second type, which are SPUDT cells and which have an excitation intensity of 100%, and at least one ... | 01/04/2011 |
| 7804221 | Surface acoustic wave device A surface acoustic wave device has high power withstanding performance and is able to effectively suppress an undesirable spurious response. The surface acoustic wave device includes an LiNbO3 substrate having Euler angles (0°±5°, θ±5°, 0°±10°), ... | 09/28/2010 |
| 7791249 | Frequency coded sensors incorporating tapers A surface acoustic wave device includes a piezoelectric substrate on which is formed a transducer that generates acoustic waves on the surface of the substrate from electrical waves received by the transducer. The waves are carried along an acoustic track to either ... | 09/07/2010 |
| 7750533 | Surface acoustic wave (SAW) device, module and oscillator for improving a Q factor [Problem] In a SAW device using a quartz crystal substrate, prevent the deterioration of Q factor due to the difference in the peak frequency between the radiation conductance of an IDT and the reflection coefficient of a reflector. [Means to Solve the Proble... | 07/06/2010 |
| 7687971 | Electric field control of surface acoustic wave velocity An apparatus in one example comprises a piezoelectric layer, a first electrode along a first side of the piezoelectric layer, and a second electrode along a second side of the piezoelectric layer. The first and second electrodes are adapted to receive a voltage bias... | 03/30/2010 |
| 7659653 | Acoustic wave device and filter An acoustic wave device includes a piezoelectric substrate, a first dielectric film formed on the piezoelectric substrate, and electrodes that are provided on the first dielectric film and excite an acoustic wave, the electrodes including electrode fingers. At least... | 02/09/2010 |
| 7626313 | Surface acoustic wave device A surface acoustic wave device includes a LiNbO3 substrate having a plurality of grooves formed in the upper surface thereof, an IDT electrode formed by filling the grooves with a metal, and a SiO2 layer arranged to cover an upper surface of th... | 12/01/2009 |
| 7576471 | SAW filter operable in a piston mode A SAW transducer includes a pair of opposing bus bars formed on a surface of a piezoelectric substrate with a plurality of interdigital electrodes extending from each of the opposing bus bars. A center region and opposing edge regions are formed, wherein each edge r... | 08/18/2009 |
| 7554242 | Surface acoustic wave chip, surface acoustic wave device, and manufacturing method for implementing the same A surface acoustic wave chip formed with an inter-digital transducer entirely over a piezoelectric substrate. In the surface acoustic wave chip, the inter-digital transducer is extended to a rim of the piezoelectric substrate, and a partition section is provided all... | 06/30/2009 |
| 7504760 | Surface acoustic wave element and method of manufacturing the same A surface acoustic wave element having power resistance is provided. In the surface acoustic wave element, upper dispersion preventing layers and side dispersion preventing layers each made of metal nitride are provided between interdigital transducer electrode port... | 03/17/2009 |
| 7477000 | Surface acoustic wave device with electro-static discharge protection Sacrificial electrodes with fractal-shaped are formed on a SAW (surface acoustic wave) device. The sacrificial electrodes discharge electro-static charge in the SAW device for protecting the IDT (inter-digital transducer) from electrostatic break. Moreover, the sacr... | 01/13/2009 |
| 7462973 | Surface acoustic wave device A surface acoustic wave device includes a piezoelectric substrate, at least one interdigital transducer (IDT) provided on the piezoelectric substrate, and a shield electrode provided on the piezoelectric substrate. The IDT has a first pattern on an edge that faces t... | 12/09/2008 |
| 7459829 | Surface acoustic wave device and method of manufacturing the same, IC card, and mobile electronic apparatus A surface acoustic wave device includes a surface acoustic wave (SAW) chip and a cover that are bonded in a body by bonding a metal bonding portion of the SAW chip and a metal bonding portion of the cover and bonding extraction electrodes of the SAW chip and connect... | 12/02/2008 |
| 7449812 | Electroacoustic transducer for a surface wave operating component An electroacoustic transducer includes a first electrode having first fingers connected to a first bus bar, and a second electrode having second fingers connected to a second bus bar. The first and second fingers interdigitate and terminate at ends. The ends of the ... | 11/11/2008 |
| 7437907 | Sensor for detecting substance in liquid and apparatus for detecting substance in liquid using the same In a sensor for detecting a substance in liquid, recesses are provided in the upper surface of a base substrate. The recesses respectively accommodate SAW elements. A resin layer having openings is arranged such that the sensing portions at the upper surfaces of the... | 10/21/2008 |
| 7436273 | Surface acoustic wave device and method for manufacturing the same A SAW chip (11) where ones are balanced signal terminals and the others are unbalanced signal terminals is mounted on a mounting board (12) in a flip chip manner, and the mounting board (12) and a surface of the SAW chip are covered with resin (... | 10/14/2008 |
| 7425788 | Surface acoustic wave device In a surface acoustic wave device, a plurality of grooves are provided on a piezoelectric substrate, an electrode film defining an IDT electrode is formed by filling an electrode material in the grooves, an insulator layer, such as a SiO2 film, is arrange... | 09/16/2008 |
| 7411291 | Component with sensitive component structures and method for the production thereof An electrical component has electrically conducting structures placed on an electrically isolating or semiconductive substrate and component structures sensitive to a voltage or an electrical arcing and galvanically separated from one another. To prevent an arcing b... | 08/12/2008 |
| 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 |
| 7411333 | Surface acoustic wave device A SAW device comprises a single crystal piezo-electric strate (made, for example, of LiTaO3 or LiNbO3), and an interdigital transducer (IDT) formed of a material mainly containing Al and disposed on the piezo-electric substrate. The piezo-elect... | 08/12/2008 |
| 7399280 | Passive and wireless in-vivo acoustic wave flow sensor A wireless surface wave flow sensor can be utilized for monitoring the flow of fluid. Such a surface wave flow sensor can be configured to include one or more interdigital transducers and a self-heating heater formed upon a piezoelectric substrate. The interdigital ... | 07/15/2008 |
| 7394336 | Elastic boundary wave apparatus An elastic boundary wave apparatus that is capable of suppressing an undesired response due to a comb-shaped capacitor electrode includes a first medium; a second medium stacked on the first medium; and a plurality of electrodes arranged in the boundary between the ... | 07/01/2008 |
