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WO/1993/016481 |
A capacitance humidity sensor (10) according to the invention has a film core (11) which is in contact with a pair of polymeric conductive layers (12, 13) bonded to opposite faces of the core (11). The core (11) is made of a polymeric ma...
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WO/1993/014510 |
An antibacterial electret material which consists of a synthesized organic polymer having a volume resistivity of not less than 1013 OMEGA.cm and containing 0.01-2 % by weight of one kind of electret stabilizer selected from the group co...
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WO/1993/011548 |
Multilayer capacitors comprise layers of a dielectric material interleaved with metallic electrodes. To improve the energy storage of such capacitors when operating in field strengths greater than 20 kV/mm, the dielectric material is a m...
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WO/1993/008578 |
A voltage variable capacitor (10) has as the base substrate a silicon wafer with a layer of high resistivity semiconductor material on top of the substrate. An insulating layer (16) of a metal oxide having a dielectric constant greater t...
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WO/1993/006610 |
A monolithic capacitor (101) whose capacitance can be varied by removing part of an electrode (106). The capacitor may comprise an end termination (105), coupled to a plurality of internal electrodes (103), which are disposed in a dielec...
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WO/1993/004495 |
In the feature proposed, a charge-storage film (2, 3, 4) of dielectric material is located on the surface of a substrate (1), the film being loaded with a given amount of charge. The side of the charge-storage film (2, 3, 4) remote from ...
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WO/1991/018406 |
A monolithic multilayer capacitor of known capacitance has a body with six external walls and a plurality of spaced electrodes (30 and 32 to 36) embedded in the body and spaced from a first one of the walls. Two spaced end walls have ele...
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WO/1991/013922 |
In one embodiment this invention provides vinylidene copolymer with alternating monomeric units as illustrated by structure (I). An invention vinylidene copolymer in the form of an electret film exhibits a high level of longitudinal piez...
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WO/1991/005246 |
A capacitance humidity sensor according to the invention has a dielectric film core (11) which is in contact with a pair of polymeric conductive layers (12, 13) bonded to opposite faces to the core (11). The dielectric core (11) is made ...
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WO/1991/004566 |
At least part of each of protective layers (1, 4a, 4b, 5a, 5b, 6a, 6b, 6c, 7, 8a, 8b) disposed outside the capacitance generating portion (2) of a film capacitor is of a substantially-unoriented polyphenylene sulfide film (10). The unori...
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WO/1990/005987 |
A rain sensor (10) for a windshield (12) having two sets of electroconductive coatings (22, 24 and 34, 36) on opposing major surfaces of the outer glass ply of a windshield. The first set of coatings (22 and 24) on the outer major surfac...
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WO/1989/011724 |
An electret material consisting of a molded article which has, as an inner component, a polar polymer with a volume resistivity of greater than 1012 ohms.cm on lateral cross section and a non-polar polymer with a resistivity of greater t...
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WO/1989/011156 |
This invention relates to an electret material having thermal stability and capable of having high trapped charge quantity and stably existing for a long period of time and a process for preparing said electret material. The electret mat...
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WO/1989/004061 |
Novel microelectrochemical devices are provided which consist of closely spaced microelectrodes (24) coated with metal ion based inorganic redox active material such as oxides (22) or mixed oxides of any of the following transition metal...
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WO/1988/009043 |
A small multilayer capacitor, such as an MLC capacitor (10) has in one of its end terminations (16 and 18) a passivation layer (17) surrounded by nested sputter-coated metallization films (22, 24, 26 and 28) to provide a safeguarding fea...
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WO/1988/006064 |
A process for fabricating an electronic device on a non-conductive polymer substrate (10), particularly from the family of polyaniline, comprises applying a covalent doping agent (18), such as an R+ donor compound, where R is an organic ...
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WO/1987/004301 |
An electrically variable three terminal monomorphic piezoelectric capacitor is manufactured with thick or thin film hybrid microelectronic circuit technology. A first capacitor plate (12) and a ridge (16), which substantially surrounds a...
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WO/1987/003088 |
A corrosion proof differential pressure transducer includes a central disk (12) and two thin diaphragms (14, 16) mounted close to but spaced from the disk on both sides thereof, with the diaphragms being intercoupled to move together. Th...
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WO/1987/000347 |
Novel Langmuir-Blodgett (LB) films of ABAB structure in which the compounds A and B are different and contain complementary groups which result in non-centrosymmetry of the layer plane. Three types of structure are described (i) in which...
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WO/1986/006752 |
Methods for forming targets of ferroelectric, metal nitrate or similar material, methods for depositing such materials using ion beam techniques, and a method for forming a combined and integrated circuit/ferroelectric memory device wher...
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WO/1986/002486 |
A capacity sensing cell (10) is adapted for manufacture in a batch process, and uses a substrate or base (11) from a rigid insulating material such as glass and a diaphragm assembly (12, 14, 15) of a brittle semiconductor. The diaphragm ...
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WO/1986/002487 |
Sensor circuitry (60) for sensing changes in capacitance of separate sensor portions (19, 20) wherein in each of the sensor portions (19, 20) a separate plate (20, 22 or 25, 33) will deflect in response to changes in parameter, for examp...
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WO/1985/004513 |
In fabricating electrets a voltage is applied across an electrically polarizable body. Large-scale breakdown effects in the body are avoided by reducing the voltage across at least a portion of the body undergoing polarization in respons...
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WO/1985/003381 |
Hermetically sealed electrical feedthrough conductors (12, 14) and (16) are formed across the periphery or boundary (18) between a hermetically sealed region (26) on a semiconductor substrate and a second or external region (20, 22) and ...
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WO/1985/001385 |
Fibrous web electrets are given added properties (1) through inclusion of a particulate material, such as a flame-retardant agent, in less than all the layers of a plural-layer film from which fibers are fibrillated, and by use of a brom...
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WO/1984/004865 |
Electrodes, electrostatic transducers employing the electrodes, and methods of making the electrodes and the electrostatic transducers. Sparking from conventional electrodes, which occurs in the air gap, causes serious damage to thin fil...
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WO/1984/003193 |
A continuous method for manufacturing an electret filter medium from dielectric material having an open or porous structure, said method comprising the step of continuously feeding a web of dielectric material (122) with a substantially ...
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WO/1984/002424 |
An electret material is formed by the method which includes the step of passing a pair of electrical conductor elements (32) along one surface of a dielectric material (20) heated to a predetermined temperature. The conductor elements (3...
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WO/1983/003028 |
A small-sized and inexpensive current limiting element with low losses used, for example, as a ballast for limiting the current of a discharge lamp, by means of ferrodielectric body having rectangular hysteresis characteristics for an AC...
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WO/1983/001536 |
A silicon capacitive pressure transducer (34) comprising two wafers of silicon (14, 32) separated by borosilicate glass (18, 21), one of the wafers (14) having a borosilicate glass pedestal (26) thereon which is metallized (30) to provid...
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WO/1983/000404 |
A method of manufacturing a pyroelectric unit which includes the steps of imparting a temperature change to pyroelectrically coupling particles dispersed between a pair of opposed electrodes (13, 14) applied by an electric field before t...
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WO/1982/004346 |
A method of producing charged Teflon material having a stable internal positive charge. Partially penetrating positive ions, which may be produced, for example, by a corona discharge or ion beam, are applied to Teflon at an elevated temp...
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WO/1982/003149 |
A current-limiting device (4) is connected in series with a discharge lamp (3). The current-limiting device (4) is composed of a capacitor having, as a dielectric, ferroelectric polycrystal ceramics mainly containing barium titanate (BaT...
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WO/1982/001455 |
Process for preparing pieyoelectric film using a corona discharge device wherein a multi-layer of pellicles (13, 15), of which ate least one or more is a piezoelectric sensitive film (13) and at least one other of the multi-layer is a co...
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WO/1982/001456 |
Polymeric films exhibiting piezoelectric properties have such properties enhanced by being subjected to improved poling apparatus of the present invention comprising a textured corona discharge electrode roller oscillating over the polym...
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WO/1981/000786 |
Thick film capacitors with screened electrodes can not be laser trimmed without damage to the dielectric. To solve this problem a thick film capacitor, with a first electrode (12), at least one dielectric layer formed from paste (14, 16)...
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JP2013004841 |
To provide a variable capacitance device capable of obtaining three or more capacitance values as well as reducing the size of the device and signal loss, and a drive voltage control circuit.A drive capacitance C1 of a variable capacitan...
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JP2013004707 |
To provide a piezoelectric film element and a piezoelectric film device which excel in piezoelectric characteristics and have high reliability.In a piezoelectric film element 10 having at least a lower electrode layer 2 and a piezoelectr...
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JP2012243841 |
To provide a small-sized and low-voltage tunable device using a hexagonal-system barium titanate bulk crystal dielectric material with high dielectric constant.The tunable element, changing an electrostatic capacitance by applying a volt...
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JP2012216880 |
To provide a capacitative device capable of accurately securing a capacitance value, a variable capacitative device capable of sufficiently securing a capacity variability rate, and a resonance circuit that uses the capacitative devices....
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JP2012169589 |
To provide a capacitive element capable of accurately securing the value of capacitance, and a variable capacitive element capable of securing an enough capacitance variable rate, as well as a resonance circuit, communication system, wir...
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JP2012156386 |
To provide a variable capacitor having a large rate of change in dielectric constant with an electric field application and low dielectric loss in a microwave/millimeter wave band.A variable capacitor is a solid solution having a composi...
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JP2012138514 |
To provide a portable device which is driven sufficiently by a low frequency vibration caused by movement of a human body, can be made lightweight and compact, and exhibits excellent durability while reducing the cost.In the portable dev...
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JP2012125894 |
To reduce an amount of outgassing remaining in an electronic device after sealing, in the electronic device, and to provide its manufacturing method.The method for manufacturing the electronic device has the steps of: forming an underlyi...
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JP2012120388 |
To provide an electrostatic induction type conversion device having high mechanical-electrical conversion efficiency.The electrostatic induction type conversion device 1, to convert electrical energy and kinetic energy, comprises: a base...
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JP2012069580 |
To provide dielectric ceramic for tunable devices which has large variation of a relative dielectric constant for dc bias electric fields, small temperature dependence of the relative dielectric constant, and small dielectric loss in a w...
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JP2012060030 |
To stably manufacture electrostatic capacitive elements having different capacitance without changing the shape of an electrode and the number of stacking of the electrodes.The electrostatic capacitive element comprises a dielectric laye...
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JP2012009929 |
To solve the problem that accuracy is low in a capacity value concerning a conventional variable capacity element.A variable capacity element of the present invention includes: a first capacity element C1 connected between a first power ...
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JP2011249722 |
To provide an electret manufacturing apparatus and an electret manufacturing method capable of manufacturing the homogeneous electrets excellent in maintainability with no deterioration of electrodes.The electret manufacturing apparatus ...
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JP2011211029 |
To reduce the size of a variable capacitive element using a ferroelectric substance that can attain expansion of a variable region of electrostatic capacity, while at the same time, maintaining a high Q-value.The variable capacitive elem...
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