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Matches 451 - 500 out of 2,100

Document Document Title
JP2008512973A  
JP4077322B2  
JP2008085291A
To suppress a leakage current and an electrostatic breakdown generated at a dielectric film step portion due to surface roughness of a dielectric film, and to improve insulation of a variable capacitance capacitor.A lower electrode layer...  
JP2008085081A
To provide a variable capacitor which has a large electrostatic capacity change to an applied voltage, and a high Q value.A first electrode layer 2 and a second electrode layer 3 are both formed of conductive material and provided confro...  
JP2008072740A
To provide an appropriate tunable multiplexer.The present invention provides a tunable ferro-electric multiplexer for use in CDMA communication devices. Tunable ferro-electric capacitors are used to tune the resonant frequencies of sever...  
JP2008066682A
To provide a variable capacitor capable of realizing both of lowering of a bias voltage and the maximization of an electrostatic capacitance changing rate.This variable capacitor comprises, a first capacitance portion which is formed by ...  
JP2008051511A
To optimize each stress of a diaphragm and a plate of a capacitance sensor.This manufacturing method of the capacitance sensor comprises the steps of depositing a film to be a diaphragm forming a movable electrode, heating the film to be...  
JP2008053563A
To suppress a capacity while overcoming the difficulty of micro-fabrication, and to secure satisfactory tunability.Organic solvent containing SiO2 is spin-coated on the main face of a high dielectric layer 16, and heating and removal tre...  
JP2008053400A
To provide an electret condenser that has reliability in humidity-proofing properties and the like improved.The electret condenser includes a polysilicon film 115 used as a fixed electrode, a polysilicon film 102 opposite to the polysili...  
JP2008506265A  
JP4053504B2  
JP2008042436A
To provide a method of manufacturing an electret capacitor headphone in which a sufficient polarization voltage can be obtained by electret without generating spark discharge.After the electret dielectric film (FEP) of each fixed pole 21...  
JP2008035569A
To provide an enhanced tunable f-e filter capable of providing a tunable range higher than a desired frequency domain through low I. L. and out-of-high-band rejection, and a method of designing the filter.The present invention quantifies...  
JP2008022585A
To provide an appropriate tunable multiplexer.A tunable ferro-electric multiplexer for use in CDMA communication device is provided. Tunable ferro-electric capacitors are used to tune the resonant frequencies of several resonators used i...  
JP2008021787A
To provide an electret having high electric charge storing performance, and to provide a manufacturing method thereof.The electret 12 consisting of an insulator film bearing electric charges has a reformed surface formed by reforming at ...  
JP2008021786A
To provide an electret having high electric charge storing performance, and to provide a manufacturing method thereof.In the electret 12 consisting of an insulator film bearing electric charges, the electric charges are distributed so th...  
JP2008016919A
To provide a sound response device having a small high sensitivity capacitor exhibiting stabilized characteristics through a simple arrangement.The sound response device 10 has a capacitor consisting of a fixed electrode film 12 and an o...  
JP2008005534A
To provide a suitable integrated inverted-F ferroelectric antenna.The integrated inverted-F ferroelectric antenna comprises a counterpoise 102, a ceramic block 110, an inverted-F structure radiator 104, a bias voltage feed metal inlaid, ...  
JP2008005535A
To provide a suitable coplanar inverted-F ferroelectric antenna.The coplanar inverted-F ferroelectric antenna 100 comprises a first dielectric layer 1000, a counterpoise layer 1002, an inverted-F radiator 1004, and capacitor circuits 101...  
JP2008005552A
To provide an apparatus improved to reduce leakage effects for a local oscillator in a direct down conversion receiver.A phase shift filter and the direct down conversion receiver which performs phase compensation are provided. A DC offs...  
JP4031367B2  
JP2007325321A
To provide an improved apparatus for reducing the leakage effect of a local oscillator in a direct down-conversion receiver. The present invention provides a phase shift filter and a direct down-conversion receiver which compensates a ph...  
JP2007534162A  
JP2007298297A
To provide an easily-miniaturizable machine electric conversion element and its manufacturing method, having low manufacturing cost, high heat resistance and high operation stability. A microphone capsule has a constitution equipped with...  
JP2007294736A
To provide a variable capacitance element in which a drop is suppressed in Q value due to voltage application at a desired frequency, and also, to provide a variable filter or the like in which insertion losses and phase characteristics ...  
JP2007294858A
To permit the electret of a dielectric film to an objective amount of electric charge with a high accuracy without investigating the condition of electric charge previously or even when the size of sound hole of a fixed electrode is smal...  
JP2007295635A
To provide an FE (ferroelectric) dielectric-tuned antenna and a method for frequency tuning a wireless communications antenna. The method comprises steps of forming a radiator (106), forming a dielectric with ferroelectric material proxi...  
JP2007295308A
To solve the problem about the heat resistance of a detecting electrode board made of a fluoric organic resin used for the conventional electret capacitor microphone (ECM), i.e., the problem that, if the apparatus is mounted at high temp...  
JP2007287996A
To ensure high reliability of a variable device that can control alternate-current (AC) power at a low power loss and with low noise. An electrode structure for the variable capacitor of this invention enables a used quantity of expensiv...  
JP3999300B2  
JP2007267272A
To provide a compact and high-sensitivity electret condenser microphone (ECM) having superior productivity. In an air gap structure, upper and lower electrodes 23, 13 oppose each other at a hollow section 16. An electret film 20 of a cha...  
JP2007227798A
To provide a variable capacitor element suppressing a decrease in Q value due to application of a voltage of desired frequency, and to provide a variable filter which is reduced in insertion loss and phase characteristic etc. The variabl...  
JP2007145960A
To provide a polymer foam excellent in surface smoothness and uniformity, to provide an electret using the same, and to provide a method for producing the same.A constituting material containing a substance capable of producing an acid o...  
JP3958173B2
To provide an easily treated variable capacitor apparatus a variable capacitor element of which can be stably supplied with a bias signal. The variable capacitor apparatus comprises a variable capacitor element C1 wherein a first electro...  
JP2007123494A
To provide a variable capacitance capacitor with high Q value which has large capacitance variation caused by applied voltage.The variable capacitance capacitor comprises a dielectric substance composed of an electrostrictive material, a...  
JP3955128B2
To provide a transparent and blue colorant to be used for a toner for electrophotograph, a developer, fine particles, fine particulate paint, ink jet ink and an electret material, having a very stable inherent frictional electric effect,...  
JP3946304B2
To improve long-term maintenance of charges by making an ionomer, whose carboxylic group of ethylene-nonsaturated carboxylic acid copolymer having a specified quantity of unsaturated carboxylic acid content is neutralized at a specific r...  
JP3946305B2
To improve long-term maintenance of charges by using a resin composition, which is composed of ethylene-unsaturated carboxylic acid copolymer and vinyl aromatic hydrocarbon-unsaturated carboxylic copolymer, and has a part of or whole cab...  
JP3904240B2  
JP3940063B2
To provide a variable capacitance element wherein parasitic resistance among variable capacitance elements formed on a silicon IC is reduced. The variable capacitance element is provided with a conductive buried electrode layer 102 of di...  
JP3938272B2
To provide an electret condenser microphone which can be made thin. The electret condenser microphone 100 is provided with an electrode plate 110 where a film 111 made of an electret material is formed on one side 110a and a through-hole...  
JP2007048764A
To surely achieve low resistance by reducing the thickness of a ceramic layer made of a BaTiO3-based semiconductor ceramic, and obtain a resistance approximate to a resistance to be calculated, based on a stacked structure.The thermistor...  
JP3898648B2
To provide a variable capacitance thin film capacitor which changes little in capacitance with high-frequency signals, varies much in capacitance with a DC bias, is protected against disconnection, and is restrained from deteriorating it...  
JP3898631B2
To provide a variable capacity thin-film capacitor which can suppress a capacity variation caused by a radio frequency signal, enhance a capacity variation caused by D.C. bias, decrease the number of thin film layers sequentially coated,...  
JP3898638B2
To provide a variable thin film capacitor and a radio frequency component which are small in the change of capacity caused by a radio frequency signal, are large in the change of the capacity caused by a D.C. bias, maintain its component...  
JP3898637B2
To provide a capacity variable capacitor circuit and a capacity variable thin film capacitor element where capacity change due to a high frequency signal is small, and capacity change due to DC bias is large and high frequency components...  
JP2006344845A
To provide a capacitor which is changed in capacitance by a DC bias applied from outside, capable of decreasing the number of laminated layers of an electrode provided to its capacitor main body, and capable of reducing a voltage necessa...  
JP3890952B2
To provide a variable capacitance capacitor device which is reduced in parasitic inductance and capable of operating over a wide range of frequency band. This variable capacitance capacitor device is equipped with an insulating board 2 w...  
JP2006328586A
To provide an electret body which exhibits excellent performances on fine particle collection, and to provide a gas-cleaning filter.This electret comprising a fiber sheet formed of two or more kinds of fibers including a polyolefin-based...  
JP2006332683A
To provide a high-frequency circuit module, capable of readily adjusting the gap of impedance and also responding to multibands or multimodes.A transmission line 41 and conductor plates 42 and 43 are formed by the conductor layer 25 of a...  

Matches 451 - 500 out of 2,100