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JP2003199197 |
To provide a multi-layer electret having ultra-high charge stability with excellent thermal resistance so as to attain a work by the surface mount technology and to provide a method of manufacturing thereof.The multi-layer electret is co...
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JP2003197467 |
To provide a variable capacitance capacitor, that is made to be mounted easily and surely on a mother board by making the formation of solder bumps easier, without compromising the electrical characteristics of the bumps and, in addition...
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JP2003124063 |
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 wh...
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JP2003109846 |
To provide a variable capacitance element where a leakage current is small, reliability is high, and variation of capacitance is large.In the variable capacitance element, a lower electrode 12, a dielectric film 13 whose dielectric const...
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JP2003068571 |
To provide a high frequency circuit module capable of easily adjusting deviation of impedance and coping even with multiple bands and multiple modes.Conductor plates 31, 32, 33 and 34 are formed by the conductor layers 26 and 28 of a mul...
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JP2003045748 |
To provide a tunable thin-film capacitor which has a high Q-value and is superior in reliability. This tunable thin-film capacitor comprises a lower electrode layer 2 formed on a substrate 1, a thin film dielectric layer 3 formed on the ...
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JP3383188 |
To simultaneously solve the problems on the adhesion of a pole material to a substrate and on the characteristic deterioration, such as fatigue, leakage current, etc., of a ferroelectric thin film capacitor by forming a conductive oxide/...
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JP2002345087 |
To provide an elecret condenser microphone where an insulation member is employed for a microphone part as well as a case part so as to enhance the processing accuracy and the assembling performance and furthermore to make the microphone...
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JP2002329640 |
To provide a variable capacitor that has an extremely small number of lattice defects in oxygen in the entire dielectric layer, and hence has an extremely small amount of dielectric loss, and to provide the manufacturing method of the va...
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JP2002329641 |
To provide a variable capacitor that has an extremely small number of lattice defects in oxygen in the entire dielectric layer, and hence has an extremely small amount of dielectric loss, and to provide the manufacturing method of the va...
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JP2002315097 |
To provide a method or manufacturing a pressure sensor and a semiconductor substrate used for the same, which can be thinned and miniaturized, while keeping high performance.Spacers 6 made of a polyimide on a semiconductor substrate 3 ha...
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JP2002299163 |
To provide a variable capacitance element, in which exfoliation of a thin-film dielectrics layer will not be generated and the resistance of a capacitance electrode layer can be made low easily, and durability is realized, when a compara...
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JP2002262395 |
To provide an outer container for an electret condenser microphone that downsizes the electret condenser microphone and enhances the reliability as a product by isolating the electret condenser microphone from a membrane ring placed in t...
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JP2002243690 |
To provide a capacitance type humidity sensor having superior reliability and being capable of being constituted of a material which can be manufactured by a normal semiconductor manufacturing line.The capacitance type humidity sensor is...
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JP2002217060 |
To provide a capacitor having a small amount of change in capacitance for the capacitor manufactured by the MEMS technique.This microcomponent has a capacitive component. The capacitive component is composed by the continuous coupling of...
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JP2002218594 |
To provide a manufacturing method for a silicon oxide film electret by which a sufficiently high deposition rate is obtained with less contained materials such as moisture and hydrogen, the silicon oxide film electret and an ECM(Electret...
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JP3318584 |
To provide a method for manufacturing a polymeric electret which can sufficiently orient dipoles, without causing dielectric breakdown and also can make a large-area film into a uniform electret. In this method for manufacturing a polyme...
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JP2002152891 |
To provide an electret type condenser microphone with a sufficiently low profile.The condenser microphone consists of a microphone main body 12 and an impedance conversion unit 14. The microphone main body 12 is configured that a condens...
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JP2002142295 |
To provide an electret capacitor microphone that can be reduced sufficiently in thickness.This capacitor microphone is constituted in such a way that a capacitor section C composed of a diaphragm 26 and a back pole plate 18 which are fac...
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JP2002125297 |
To provide a laminated sheet for an electret in which the thickness of an electret layer is set so as to be 12 μm or less without generating any film failure such as pin holes.A thermoplastic resin film which is able to constitute an el...
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JP2002083737 |
To provide a nonlinear dielectric element, in which a nonlinear characteristic in electric field-charge is difficult to be deteriorated and a large pulse voltage can be obtained surely.The nonlinear dielectric element is provided with an...
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JP2002078091 |
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 ...
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JP3286998 |
PURPOSE: To provide an antibacterial electret material which possesses both an antibacterial characteristic and the characteristic of an electret, and is also stabilized in electric charge. CONSTITUTION: An antibacterial electret materia...
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JP2002064188 |
To provide an integrated circuit storage device which comprises a high-quality ferroelectrics capacitor of a flat shape.Firstly a lower-part electrode is formed, a layer comprising Pb (ZrXTi1-X)O3 (where, X=0.0-0.92) is formed, and then ...
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JP2002043167 |
To provide a chip-type electronic component, having a glass coat layer resistant to crackings and a ceramic member whose insulation resistance is hard to degrade, and to provide a method of manufacturing the same.A laminate capacitor has...
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JP2002033241 |
To provide a silicon oxide film electret, which is improved in moisture resistance characteristics and is immune to uses as an element for reflow, and to provide an electret capacitor microphone.For this silicon oxide film electret, a si...
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JP3272443 |
PURPOSE: To provide the device enabling to again charge by a simple means, when the surface charge density of a cap, etc., produced from an electret fiber sheet is lowered. CONSTITUTION: The device has a heating chamber 3 whose bottom su...
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JP3263429 |
PURPOSE: To provide a semiconductor device which suitably operates as an electronic memory of a computer and its manufacture, and to shorten its access time. CONSTITUTION: A capacitor 2 which consists of a lower electrode 11, an oxygen c...
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JP2001338839 |
To provide a variable capacitance capacitor the capacitance of which changes at a large changing rate, is sufficiently small in loss even under a high-frequency condition, and causes a linear frequency change against an impressed voltage...
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JP3258377 |
PURPOSE: To obtain composite material for electret which is suitably used for an electrostatic type electroacoustic transducer such as a microphone and a head phone. CONSTITUTION: In the manufacturing method of composite material for ele...
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JP3253847 |
To provide a process for producing an electret by simultaneously applying charges having opposite polarities to both sides of a dielectric material and be treated and provide a production apparatus. This production process comprises (1) ...
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JP2001326136 |
To provide conductive paste, which is used for the formation of the terminal electrodes of a nonlinear capacitor exhibiting satisfactory nonlinear characteristics, and to provide a nonlinear capacitor using the paste.The conductive paste...
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JP2001298201 |
To provide a semiconductor control circuit element which can control an electric circuit at a high speed, by quickly and remarkably changing only a part of the resistance of the element subjected to light or electric-field application, a...
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JP2001267497 |
To solve the problem where a lower power source voltage of a portable electronic apparatus causes narrower voltage width applicable to a variable capacity element, resulting in insufficient capacity change coefficient.With an MOS type ca...
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JP2001210550 |
To provide a variable voltage capacitor having improved C-V linearity.This variable voltage capacitor contains a support board 41 having a doped layer 42, which has a insulating layer 45 on it, first, second and third capacitors 47, 49, ...
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JP2001210549 |
To provide an electlet having high electric charge density on the surface under normal or high temperature and with superior holding ability of the electric charge density, especially to provide an electlet with superior collecting abili...
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JP2001196853 |
To provide an integrated voltage controlled oscillator to be band- switched. The source-drain capacitor of an FET device is used by mutually electrically connecting a source and drain so as to form a two-terminal capacitive device which ...
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JP3199947 |
PURPOSE: To provide the title polymer electret obtained by compounding a charge regulator used in electrophotographic toner with a polymer and excellent in charge stability, having markedly long charge life and improved in the homogeneit...
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JP3195827 |
PURPOSE: To form a ferroelectric layer by making an organic solvent solution contain Bi and Ti in the shape of metal organic or inorganic compounds in a stoichiometric ratio, bringinging the uniformly mixed organic solvent solution into ...
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JP2001118749 |
To provide a method and a device capable of forming a sufficient electret in a short time. In this electret making method, in the state of clamping a porous body to be processed with a pair of dielectrics whose total capacitance is 2×10...
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JP2001085272 |
To obtain a variable capacitor which is low in loss and excellent in frequency characteristics by a method wherein a first and a second electrode are arranged confronting each other as being insulated from each other, and an organic P-N ...
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JP2001076969 |
To enlarge frequency variable width by connecting a variable capacity element where a comb-type electrode is formed on a ferroelectric thin film or an antiferroelectric thin film where accumulated charge quantity shows hysteresis with re...
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JP2001035747 |
To discourage crackings caused by difference in contraction behavior between an internal electrode and a ceramic layer, inside a laminate at baking. A laminated body 3, where a ceramic layer 7 and internal electrodes 5 and 6 are laminate...
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JP3152229 |
To easily test a switching control circuit of a capacitor array in a temperature compensation circuit for a crystal oscillator. Each array is provided with transfer gates 91-96 that are switched on/off with the output of a linear control...
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JP3152228 |
To smoothly compensate the temperature of a quartz resonator even near an inflection point correspondingly to the temperature characteristic of the resonator which draws quadratic and cubic curves. The temperature of a quartz resonator i...
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JP2000348973 |
To realize a ceramic passive device of low cost by a method wherein the dielectric body of the ceramic passive device is formed of specific ferroelectric ceramic material having a relative permittivity depending on voltage.A ceramic pass...
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JP3127849 |
To improve safety by dissolving organometallic compds. in a specified solvent, coating the top of a substrate with the resultant soln. and forming a thin oxide film by heat treatment. Two or more of organometallic compds. separately cont...
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JP2000304606 |
To provide an infrared radiation detecting device at a low coat by solving a problem that coat reduction and miniaturization are impossible because an impedance conversion circuit of the conventional infrared radiation is composed of a h...
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JP2000269080 |
To provide a method for manufacturing a polymeric electret which can sufficiently orient dipoles, without causing dielectric breakdown and also can make a large-area film into a uniform electret. In this method for manufacturing a polyme...
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JP2000269066 |
To relax stresses generated during burning of a laminate for causing less cracks and delaminations within the laminated body during the burning. This multilayer ceramic capacitor has a laminate 3, having ceramic layers 7 and internal ele...
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