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Patent Searching and Data


Matches 401 - 450 out of 2,100

Document Document Title
JP4307084B2  
JP4307141B2  
JP2009164539A
To provide an electret structure surely securing the moisture resistance regardless of the thickness of an inorganic electret member, and also to provide its forming method, and an electret type capacitance sensor.A silicon microphone 10...  
JP2009147204A
To obtain a variable capacitor which can control its capacitance, using a simple structure through easy and simple control.Fixed capacitors C1 to C5 are mounted on a substrate 3 which are connected in parallel. FET 1 to FET 4 are located...  
JP2009142043A
To control AC power with a low loss and low noise while reducing a size and cost, also reducing the mounting number of components, and saving a space.A variable capacitance element of a variable capacitor C2(1VC) is connected to a fixed ...  
JP4286304B2  
JP2009123999A
To provide a method for manufacturing a micro condenser microphone, which can achieve an electret process of a dielectric film of a MEMS microphone chip by using inexpensive manufacturing facilities of simple structure and can improve pr...  
JP4268205B2  
JP4264103B2  
JP4264104B2  
JP2009088444A
To provide an electret having high surface charge density, and to provide an electret capacitor microphone that has the electret.The electret contains a fluorine aromatic resin consisting mainly of a fluorine aromatic polymer. The electr...  
JP2009088100A
To provide a material for an electret having an excellent adhesion to a metallic base and a high heat resistive charge storage rate, and to provide an electret component using the electret material.A material 10 of an electret includes a...  
JP2009076788A
To provide a laminated ceramic element capable of precisely detecting temperature, and to provide a mounting structure thereof.The mounting structure has an NTC capacitor 1, an NTC thermistor, a choke coil, a switching circuit, a feedbac...  
JP2009076613A
To provide an electrostatic operation device capable of suppressing discharge of electric charges induced at an electrode through a spacer (projection portion) while suppressing contact between a first electrode portion and a second elec...  
JP2009508340A  
JP2009507446A  
JP2009021770A
To provide an EBG element capable of successfully performing leak cutoff to a broadband high-frequency circuit.An antenna 102 on an insulating film 101 of a substrate 100 is connected to a transmission path 104 in the insulating film 101...  
JP2009016613A
To miniaturize a device and to improve reliability.In the capacitor array incorporating a plurality of variable capacitors C1-C4, a plurality of positive and negative electrodes are alternately stacked for the respective variable capacit...  
JP2009006313A
To provide a novel electret article comprising a polymer exhibiting an excellent oily mist loading performance, low penetration, and a small pressure drop and a performance enhancing additive.Disclosed is an electret article in the form ...  
JP2008311387A
To adjust a surface voltage charged on an electret dielectric film to a predetermined voltage by a simple technique.For example, when adjusting an surface voltage charged on an electret dielectric film 23 which is contained on the side o...  
JP2008300646A
To improve yield or reliability of a variable-capacitance system in which multiple MEMS varactors including defective elements are integrated.A controller 100 for variable-capacitance elements has a directive means 108 for directing cont...  
JP2008294455A
To detect in which direction of directions orthogonal to a substrate a physical quantity acts even while manufacture is performed by a simple manufacturing process.A movable electrode 148a can be displaced in a z axial direction (directi...  
JP4191959B2  
JP4181580B2  
JP2008277473A
To provide an electret element capable of suppressing the reduction of charge to be stored in an electret film.The electret element 100 has: the electret film 2 capable of storing charge; and a charge outflow control film 3 that is forme...  
JP2008277996A
To provide a variable capacitance capacitor which can easily control the characteristics, and to provide a filter circuit.The variable capacitance capacitor includes a variable capacitance element group, comprising a plurality of variabl...  
JP2008263157A
To provide an electret element which can inhibit a charge accumulated in an electret film from being reduced.The electret element 100 includes an electret film 3 into which an electron is injected and a barrier film 4 which is located on...  
JP2008258670A
To provide an antenna device that realizes transmission and reception, in a frequency band having a wide bandwidth.The antenna device is equipped with a variable capacitance capacitor C2 using a dielectric material, a capacitor C1 connec...  
JP2008258186A
To provide a compact variable capacity device having a high continuously variable capacity ratio.The variable capacity device comprises a variable capacity capacitor employing a ferroelectric material, a capacitor connected in series wit...  
JP2008252340A
To provide a tunable filter which is capable of efficiently varying a coupling capacitance between resonators with a simple structure and is suitable for integration.In the tunable filter 10, by arranging the two or more resonators 12a a...  
JP4157375B2  
JP2008228315A
To provide a preferable integrated ceramic inverted-F ferroelectric antenna.The inverted-F ferroelectric antenna includes a counterpoise 102, a ceramic block, an inverted-F structure radiator 104, a bias voltage feed 300 metal inlay, a g...  
JP2008219900A
To provide a narrowband resonant circuit for measuring the loss of the ferroelectric component.A tunable ferroelectric component (610 to 614) and a narrowband resonant circuit (610 to 620) for measuring the loss of the ferroelectric comp...  
JP2008211064A
To provide a variable-capacity capacitor array that is excellent in controllability of a capacity value and has no change in tunability, and a variable-capacity capacitor relay.The variable-capacity capacitor array is provided with a plu...  
JP4142128B2  
JP4141679B2  
JP4142127B2  
JP4121362B2  
JP2008167474A
To provide FE dielectric-tuned antennas and a method for frequency tuning a wireless communications antenna.The method comprises forming a radiator; forming a dielectric with ferroelectric material proximate to the radiator; applying a v...  
JP2008159661A
To provide a wanted variable capacitance range by combining a plurality of capacitors while eliminating or decreasing the required number of switches.The variable capacitor comprises a first electrode provided at a fixed part including a...  
JP2008161036A
To provide an electrostatic induction type converter which improves conversion efficiency between kinetic energy and electrical energy.The electrostatic induction type power generator (electrostatic induction type converter) 300 includes...  
JP2008154240A
To provide a small and highly reliable resonator which is manufactured easily, and also to provide an electronic apparatus employing it.The present invention relates to a resonator comprising two acoustic impedance transducers T1, T2 and...  
JP4106034B2  
JP2008141171A
To provide an electret device capable of increasing the surface potential of an electret film composed of a silicon oxide film.An electret device 10 includes a silicon substrate 1 having a groove 1b on the main surface 1a thereof and an ...  
JP2008118070A
To provide a variable capacitance element in which the passage of direct current is prevented.The variable capacitor element comprises: a first capacitative element 3 that has plate electrodes 3a and 3b opposed to each other via a ferroe...  
JP2008112755A
To provide a new technique for making electret for a condensor microphone, capable of forming an electret of a dielectric film of a condensor microphone to be formed through micro-processing of a silicon substrate without laboring, and c...  
JP2008112781A
To provide an electret element capable of forming a region having high charge density on an electret film.The electret element 10 has: the electret film 2 capable of storing charge; and a charge outflow suppression film 3 that is formed ...  
JP2008516444A  
JP2008108862A
To enlarge a band which a capacitor can use.In the capacitor having a pair of electrodes and a dielectric sandwiched between a pair of the electrodes, a frequency with which orientation polarization of the dielectric dissipates is set to...  
JP2008098609A
To provide a tunable capacitor using an electrowetting phenomenon, which facilitates a fabrication process, provides good reliability and durability, and has no limitation on a tuning range.The tunable capacitor includes a first electrod...  

Matches 401 - 450 out of 2,100