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Nihon Dempa Kogyo Co., Ltd. Patents
Assignee:
Nihon Dempa Kogyo Co., Ltd.
Address:
Tokyo, JP
No. of patents:
335
Patents:


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Patent Number Title Of Patent Date Issued
RE30506 Tuning fork-type quartz crystal oscillator and method for stabilizing the vibration frequency th February 3, 1981
A method for stabilizing the vibration frequency of an oscillator which contains a tuning fork-type quartz crystal element comprising a pair of arms each having a given size and a common connecting section connecting the mutually facing ends of the paired arms. The method comprises bondi
D649127 Crystal unit November 22, 2011
D630597 Crystal unit January 11, 2011
D605535 Bio-sensor December 8, 2009
D604185 Bio-sensor November 17, 2009
D603726 Crystal resonator for bio-sensor November 10, 2009
D603725 Bio-sensor November 10, 2009
D598108 Ultrasonic probe August 11, 2009
D588477 Bio-sensor March 17, 2009
D578905 Flow meter for bio-sensor October 21, 2008
D575169 Crystal resonator for bio-sensor August 19, 2008
D574280 Temperature controlled oven for bio-sensor August 5, 2008
D573496 Measuring device for bio-sensor July 22, 2008
D546460 Ultrasonic probe July 10, 2007
D544606 Ultrasonic probe June 12, 2007
D540700 Crystal resonator for QCM measurement of toxic materials April 17, 2007
D526584 Frequency measuring device for a crystal resonator August 15, 2006
D526583 Crystal resonator for a bio-sensor August 15, 2006
8581671 Oscillation device November 12, 2013
An oscillation device capable of highly accurate temperature compensation of an output frequency is provided. The oscillation device includes: first and second oscillator circuits oscillating first and second quartz-crystal resonators with overtones respectively; a frequency differen
8581670 Oscillation device November 12, 2013
To perform, in an oscillation device compensating an output frequency based on a detection result of ambient temperature, temperature compensation of the output frequency with high accuracy. First and second quartz-crystal oscillators are structured by using a common quartz-crystal p
8581476 Quartz-crystal devices and methods for manufacturing same November 12, 2013
Methods are disclosed for manufacturing quartz-crystal devices. In an exemplary method three wafers are prepared. One is a quartz-crystal wafer defining multiple quartz-crystal pieces; a second is a wafer defining multiple package bases; and a third is a wafer defining multiple lids for
8581472 Ultrasonic probe and manufacturing method thereof November 12, 2013
A manufacturing method of an ultrasonic probe that has a signal foil made of a copper foil patterned by an additive method is provided. The manufacturing method includes preparing a base material and forming an insulating layer on a surface of the material, patterning the insulating
8580126 Piezoelectric vibrating pieces comprising edge mesa steps, and methods for manufacturing same November 12, 2013
An exemplary method for a producing a piezoelectric vibrating piece having at least one mesa step includes forming a metal film on a main surface of a piezoelectric wafer. A through-groove is formed through the thickness of the wafer to form a plan profile of a desired piezoelectric
8576020 Crystal oscillator and method of manufacturing the same November 5, 2013
A crystal oscillator with improved tolerance to radiation such as X-rays includes: a container body; a quartz crystal blank accommodated in a first recess formed on one main surface of the container body and hermetically encapsulated in the first recess by a metal cover; and an IC ch
8574159 Thermally enhanced ultrasonic probe November 5, 2013
The present invention relates to an ultrasonic probe provided with a piezoelectric element for ultrasonic generation that has drive electrodes formed on two main surfaces thereof; an acoustic matching layer formed on the first main surface side of the piezoelectric element; a backing
8570110 Surface mount type crystal unit October 29, 2013
An object of the invention is to provide a surface mount oscillator that can suppress a change with the lapse of time in frequency characteristics. A surface mount type crystal unit 1 includes: a framed crystal plate 2 in which an oscillating part 6 having a first excitation electrod
8564378 Voltage-controlled oscillating circuit and crystal oscillator October 22, 2013
A voltage-controlled oscillating circuit includes a differential amplifying circuit connected to a resonant element such as a quartz crystal element. The differential amplifying circuit includes first and second input terminals connected to the resonant element and also connected res
8299864 Voltage controlled temperature compensated crystal oscillator October 30, 2012
The invention provides a multifunctional VC-TCXO that, as well as promoting miniaturization, selectively configures the functions as needed, and furthermore, is suitable for power savings. In a VC-TCXO provided with a chamber body that accommodates an IC chip and a crystal blank, the
8299859 Surface mount crystal oscillator and manufacturing method of the same October 30, 2012
There are disclosed a surface mount crystal oscillator which can enhance a product quality and improve productivity while realizing miniaturization and a manufacturing method of the crystal oscillator. On wall faces of through holes formed in corner portions of a rectangular ceramic
8298486 Piezoelectric resonator and sensing sensor October 30, 2012
Objects of the present invention is to provide a piezoelectric resonator having high frequency stability and a sensing sensor using the piezoelectric resonator. In the present invention, a piezoelectric resonator 1 has: a first oscillation area 105 which is provided in a piezoelectri
8289093 Voltage controlled oscillator October 16, 2012
To provide a voltage controlled oscillator capable of being treated as a lumped constant circuit, having small size and capable of obtaining an oscillation frequency in a high frequency band. A resonance part in a voltage controlled oscillator has variable capacitance elements whose
8289089 Surface mount crystal oscillator and manufacturing method of the same October 16, 2012
There are disclosed a surface mount crystal oscillator which can enhance a product quality and improve productivity while realizing miniaturization and a manufacturing method of the crystal oscillator. On wall faces of through holes formed in corner portions of a rectangular ceramic
8288925 Method of manufacturing quartz resonator element, quartz resonator element, quartz resonator, an October 16, 2012
To provide a method of manufacturing a quartz resonator element having a small CI value, a quartz resonator element manufactured by this method, a quartz resonator, and a quartz oscillator. In a method of manufacturing a quartz resonator element in which on a surface of a plate-shaped qu
8283989 Voltage controlled oscillator October 9, 2012
There is provided a voltage controlled oscillator using a Colpitts circuit capable of suppressing deterioration (decrease) in variable range (adjustable range) of an output frequency due to the influence of an inductance component on a conductive line, which connects a connection poi
8278798 Crystal device October 2, 2012
An object is to provide a crystal device that uses a mesa-structure crystal piece in which frequency adjustment is possible. A configuration is such that in a crystal device having: a crystal piece having a thick portion and a thin portion, with an excitation electrode formed on both
8277731 Sensing device October 2, 2012
To shorten the time required for an oscillation frequency to stabilize in a sensing device sensing a substance to be sensed by using the fact that a natural frequency of a piezoelectric resonator changes when the substance to be sensed is adsorbed by an adsorption layer formed on the
8273027 Ultrasonic probe September 25, 2012
In an ultrasonic probe of the present invention, a probe main body that comprises a flat shaped piezoelectric element group having a plurality of strip shaped piezoelectric elements arranged in a line in the major axis direction, which is the crosswise direction of the piezoelectric
8264296 Voltage controlled oscillator September 11, 2012
A voltage controlled oscillator (VCO) securing a wide range of variable amount of oscillatory frequency is provided. In the VCO, a resistor R1 and a capacitor C1 are connected in series on a line of a crystal resonator and a control voltage supply terminal, a cathode of a variable-ca
8264128 Piezoelectric component and manufacturing method thereof September 11, 2012
An object of the present invention is to economically manufacture a piezoelectric component having superior molding pressure resistance and reduced height. The present invention comprising: a piezoelectric substrate with piezoelectric devices formed on a principle surface; a device w
8261427 Methods for manufacturing crystal devices September 11, 2012
Crystal devices are disclosed, of which an exemplary device includes a crystal frame comprising a crystal vibrating piece having an electrode pattern and an outer frame supporting the crystal vibrating piece. The device also includes a crystal package base including at least one conn
8256274 Sensing device September 4, 2012
Time-series data of piezoelectric resonator frequencies for each concentration of a substance to be absorbed is collectively displayed. An absorption start point of a substance to be absorbed is set in pieces of the time-series data. An editor combines and displays at least frequency
8248174 Surface mounted oven controlled type crystal oscillator August 21, 2012
The invention relates to an oven controlled crystal oscillator for surface mounting with reduced height (low profile). The oven controlled crystal oscillator for surface mounting comprises: a flat first substrate made of ceramic and on which are installed a crystal device and a heat
8242856 Piezoelectric oscillator August 14, 2012
There is provided a temperature compensated piezoelectric oscillator which excels in frequency stability and has a good electronic noise characteristic, and with which a circuit can be structured simply. An auxiliary oscillator unit 21 sharing a crystal substrate 2 with a main oscill
8242664 Elastic wave device and electronic component August 14, 2012
To provide an elastic wave device that is small sized and in which a frequency fluctuation due to a change with time hardly occurs, and an electronic component using the above elastic wave device. A trapping energy mode portion 2 provided in an elastic wave waveguide 10 made of an el
8237329 Elastic wave device and electronic component August 7, 2012
To provide an elastic wave device that is small sized and in which a frequency fluctuation due to a change with time hardly occurs, and an electronic component using the above elastic wave device. A trapping energy mode portion 2 provided in an elastic wave waveguide 10 made of an el
8233519 Signal processing unit and wireless communication device July 31, 2012
A signal processing unit and a wireless communication device are provided for making it possible to detect a frequency by means of a small scale operation circuit in a short time. The signal processing unit and the wireless communication device are comprised of a carrier data generating
8233219 Optical multilayer thin-film filters and methods for manufacturing same July 31, 2012
Optical multilayer thin-film filters (OMTFFs) are disclosed. An exemplary filter includes a transparent substrate, a multilayer film (MF) on a surface of the substrate, and a top layer. The MF is of alternatingly laminated layers of a high-refractive-index (HRI) material and a low-re
8230563 Method of manufacturing a piezoelectric component July 31, 2012
A method for forming a piezoelectric component includes forming a plurality of sets of first piezoelectric elements having comb-shaped electrodes and wiring electrodes on a principal surface of a piezoelectric substrate base material, forming a protective film, a seed layer, and term
8228970 Signal processing device and wireless apparatus July 24, 2012
There is provided a signal processing device and a wireless apparatus capable of not erroneously determining polarity, appropriately performing a spread modulation process, a carrier modulation process, and reception data demodulation process, improving reception accuracy, and miniat
8227958 Piezoelectric devices and methods for manufacturing same July 24, 2012
An exemplary piezoelectric vibrating device includes a piezoelectric frame that supports and surrounds a tuning-fork type piezoelectric vibrating piece having a pair of vibrating arms. The device also includes a lid and a package base that are siloxane-bonded to the frame. The lid de
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