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WO/2005/005320A1 |
The present invention relates to a ferroelectric ceramic compound having the composition of the following formula: s[L]-x[P]y[M]z[N]p[T], a ferroelectric ceramic single crystal, and preparation processes thereof. The ferroelectric cerami...
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WO/2004/093145A2 |
This invention provides a method of fabricating a tunable dielectric slurry, comprising, depositing a thick film tunable dielectric onto a substrate, subjecting the thick film to UV radiation exposure after it is coated onto the substrat...
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WO/2004/038848A2 |
A device for varying the capacitance of an electronic circuit is disclosed. The device comprises a flexible membrane located above the electronic circuit, a metal layerconnected to the flexible membrane, and bias circuitry located above ...
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WO/2004/038743A1 |
A process for producing a laminated ceramic capacitor, comprising the steps of alternately stacking ceramic green sheets, the ceramic green sheets containing a ceramic raw material consisting of barium titanate, and internal electrodes t...
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WO/2004/020073A1 |
A method for adhering a film to a substrate comprises providing an electret film having first and second opposed major surfaces, the electret film comprising a poly(ethylene-co-(meth)acrylic acid) ionomer; providing a substrate; and elec...
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WO/2003/102983A1 |
The present invention relates to an electret transducer, which has surface layers (3) made of conducing material, between which layers there is electret material (1) and which surface layers include connecting elements (4) for connecting...
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WO/2003/088358A1 |
Tunable capacitors (10, 20, 30, 40) have a dielectric material (16, 26, 36, 42) between electrodes, which dielectric material comprises an insulating material (17, 27, 37, 42) and electrically conductive material, (18, 28, 38, 48) e.g., ...
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WO/2003/038996A2 |
A capacitive element includes two or more voltage-variable capacitors (varactors) ( C ). The varactors are configured so that they are coupled in series with respect to an applied AC signal (110A-110B) and are coupled in parallel with re...
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WO/2003/036669A1 |
Capacitors (10,20,40,50,70,80) having a fluid dielectric material that is transported or undergoes a phase change are disclosed. The dielectric medium change results in a change in the total dielectric constant of the material between th...
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WO/2003/034452A1 |
A variable capacitance capacitor device being fabricated by micro electromechanical system technology, comprising an insulating substrate (2) having one side (2a) on which at least two capacitor electrodes (3, 4) are formed while being i...
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WO/2003/023796A2 |
A method of making an electret that includes contacting a porous substrate that includes polymer with a composition that includes solvent capable of swelling the polymer, removing the solvent from the substrate, and contacting the substr...
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WO/2003/005385A1 |
Capacitor material for use in forming capacitors, is disclosed. More specifically, the invention is directed to capacitors formed from this material that have one or more discrete electrodes (314), each electrode (314) being exposed to a...
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WO/2002/098818A1 |
Tunable dielectric materials including an electronically tunable dielectric and a low loss glass additive are disclosed. The tunable dielectric may comprise a fen-oelectric perskovite material such as barium strontium titanate. The glass...
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WO/2002/091409A2 |
The present invention relates to an electrically controllable/tunable microwave device (10) comprising a ferroelectric substrate (101) with a variable dielectric permittivity and conducting electrodes (102, 103A-C), arranged on said subs...
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WO/2002/089187A2 |
A method of forming minimally spaced MRAM structures is disclosed. A photolithography technique is employed to define masking patterns, on the sidewalls of which spacers are subsequently formed to reduce the distance between any of the t...
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WO/2002/087016A1 |
A family of FE dielectric-tuned antennas and a method for frequency tuning a wireless communications antenna are provided. The method comprises: forming a radiator (106); forming a dielectric with ferroelectric material proximate to the ...
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WO/2002/087082A1 |
The present invention provides for low loss tunable matching circuits at rf frequencies. Ferro-electric materials are used to produce low loss tunable capacitors and inductors for use in matching circuits.
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WO/2002/084684A2 |
A tunable capacitor that introduces significantly less loss, if any, costs less and is smaller than previously available. A bias electrode (14) is coupled to a FE material (16). The capacitor electrodes (21, 24) are electro−magneticall...
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WO/2002/084858A1 |
A crystal oscillator having tunable ferroelectric components. A first ferroelectric capacitor is coupled to an automatic frequency control line for fine tuning the reference frequency. A second ferroelectric capacitor is coupled to tempe...
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WO/2002/084857A1 |
A voltage controlled oscillator incorporating a ferroelectric capacitor in its resonant circuit is provided in order to provide superior phase noise performance and a linear control voltage/capacitance relationship. The resonant circuit ...
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WO/2002/084798A1 |
An inverted-F ferroelectric antenna is provided. The antenna comprises a counterpoise, or groundplane (102), and an inverted-F structure radiator (104) having a first end (106) connected to the counterpoise. A fixed dielectric material (...
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WO/2002/084778A2 |
The present invention provides a phase shifting filter and a phase compensating direct downconversion receiver. A DC offset detector detects a DC offset in a received baseband signal and provides a feedback signal. A tunable filter phase...
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WO/2002/084310A1 |
A tunable ferroelectric component (610-614) and a narrowband resonant circuit (610-620) for measuring the loss of the ferroelectric component. The ferroelectric component may be a capacitor integrated in the resonant circuit. The testing...
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WO/2002/084685A1 |
The present invention quantifies and reduces losses in tunable bandpass filters having ferro-electric capacitors. Given a required insertion loss and the quality factor of a resonator, the geometric losses resulting from a particular top...
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WO/2002/084781A1 |
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 several resonators used in a multiplexer and to tun...
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WO/2002/084686A1 |
A ferro-electric filter and method of tuning same. The filter includes a switch for switching between quarter wave resonator and half wave resonator modes. The filter also includes a ferro-electric component for tuning the resonant frequ...
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WO/2002/041341A2 |
The invention concerns a capacitive device, such as a voltage controllable (Vc) capacitance, comprising at least a first armature (L) and a second armature (R), the armatures being separated by an insulating layer (D) including a plurali...
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WO/2002/016973A2 |
The present invention involves forming layers of conductive material (12, 16; 17, 18) and dielectric material (14) or material with varying conductivity and indexes of refraction to form various electronic and optical devices.
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WO/2002/003408A2 |
Flat electrolytic capacitors particularly for use in implantable medical devices having stacked cathode and anode layers particular electrical connections of the capacitor anode and cathode layers with a capacitor connector assembly. Ano...
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WO/2001/088933A1 |
A new type of high-Q variable capacitor includes a substrate (12), a first electrically conductive layer (14) fixed to the substrate, a dielectric layer (24) fixed to a portion of the electrically conductive layer, and a second electrica...
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WO/2001/084572A2 |
This invention provides tunable devices incorporating the dielectric CaCu¿3?Ti¿4?O¿12?. CaCu¿3?Ti¿4?O¿12? is especially useful in tunable devices such as phase shifters, matching networks, oscillators, filters, resonators, and ante...
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WO/2001/084698A1 |
Frequency regulating apparatus (30) comprising a high power, voltage variable dielectric varactor (16) or capacitor (31) (or ferroelectric voltage variable dielectric capacitor (31)) for use as a control element in the regulation circuit...
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WO/2001/080257A1 |
A method of making an electret includes condensing vapor from the atmosphere of a controlled environment onto a dielectric article and then drying the article to remove the condensate.
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WO/2001/078230A1 |
The invention describes a tunable filter arrangement with at least two resonators which are coupled to one another and of which at least one is connected to a capacitor with tunable capacitance. The electrical properties of the resonator...
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WO/2001/068554A1 |
The invention relates to a ceramic mass (1) consisting of one ceramic material (2) and at least one other kind of ceramic material (3) different therefrom. Glass material (4) is arranged between the ceramic materials. The glass material ...
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WO/2001/052401A1 |
The source to drain capacitance of a FET device is used by connecting the source and drain together electrically so as to form a two terminal capacitive device which may be switched into and out of a parallel resonant circuit. Thus, sets...
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WO/2000/072382A1 |
A ferroelectric memory cell (200) for storing information and a method for fabricating the same. The information is stored in the remnant polarization of a ferroelectric dielectric layer by setting the direction of the remnant polarizati...
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WO/2000/062367A1 |
The present invention relates to an electrically tunable device (10), particularly for microwaves. It comprises a carrier substrate (1), conducting means (3A, 3B) and at least one tunable ferroelectric layer (2). Between the conducting m...
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WO/2000/035042A1 |
This invention provides a voltage tunable filter comprising an input connection point, an output connection point, and at least one circuit branch electrically coupled to the input connection point and the output connection point and inc...
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WO/2000/028613A1 |
A voltage tunable dielectric varactor includes a tunable ferroelectric layer and first and second non-tunable dielectric layers. First and second electrodes positioned adjacent to the tunable ferroelectric layer form a tunable capacitor....
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WO/2000/024079A1 |
A voltage tunable dielectric varactor includes a substrate having a low dielectric constant and having generally planar surface, a tunable ferroelectric layer positioned on the generally planar surface of the substrate, and first and sec...
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WO/2000/012427A1 |
The invention relates to a micromechanical component placed on the face of a substrate. A counter-electrode of a cell capacitor is placed under a cavity (H), whereby said counter-electrode can be composed of a first part of a lower condu...
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WO/2000/001737A1 |
An electret that includes a surface modified polymeric article having surface fluorination produced by fluorinating the polymeric article. The electret may be a nonwoven fibrous web that comprises electrically charged microfibers where t...
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WO/2000/000267A2 |
A porous polymeric sheet (18) is provided having an electrostatic charge and comprising a zero-three composite of a polymeric matrix and a ferroelectric material dispersed therein. The polymeric component comprises a non-polar thermoplas...
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WO/1999/066985A1 |
An implantable medical device such as a defibrillator is described. The device includes an hermetically sealed housing containing a flat electrolytic capacitor and an energy source such as a battery. The battery is connected to the capac...
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WO/1999/059172A1 |
Thin electret layer with a layer thickness of less than 200 $g(m)m made of polymers containing fluorine. The mean chain length of the polymer chain contained in the layer produced by evaporation, sputtering, ablation, blowing or dispersi...
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WO/1999/033075A2 |
The invention relates to a digitally adjustable electronic capacitor which can be digitally controlled, tuned in a large capacity range across several magnitudes independently of the voltage available, integrated into circuits and produc...
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WO/1999/026261A1 |
The invention is embodied in an electrical device which includes at least a layer of a ferroelectric polyvinylidine fluoride polymer that has been processed to exhibit an electrostrictive strain of 4 % or more when an electric field grad...
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WO/1999/016532A1 |
Novel electret articles containing a polymer and a performance-enhancing additive can be identified by their thermally stimulated conductivity characteristics or their filtration properties. Electret articles such as nonwoven filter webs...
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WO/1998/056836A2 |
The invention relates to electrets produced on the basis of cycloolefin copolymers (COC) and characterized by long-term stability of the charges applied thereto, even at high temperatures and high relative air humidity. Cycloolefin copol...
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