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Patent Searching and Data


Matches 151 - 200 out of 2,100

Document Document Title
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...  
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...  
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...  
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...  
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...  
WO/1998/024130A1
There are provided an actuator part main body (26) which has an antiferroelectric film (22) and a pair of electrodes (24a and 24b) formed on one major face (surface) of the antiferroelectric film (33), a vibratory part (18) which support...  
WO/1998/013840A1
According to the suggested method for manufacturing a low self-inductance capacitor integrated in a casing, the wiring between the capacitor (1) junction elements and the passages are made with flexible leads (2) preferably of substantia...  
WO/1997/040506A1
A variable capacitor includes a first electrode (2), a second electrode (3) and, located between the first and second electrodes, an array of gas discharge tubes (7). The capacitor includes means for producing an electrical discharge in ...  
WO/1997/038429A1
A capacitor having a floating plate-shaped electrode (16), at least two patterned plate electrodes (20, 22) overlying the floating plate-shaped electrode (16), and a dielectric layer therebetween (24). The resulting structure exhibits hi...  
WO/1995/005501A2
A method of charging a nonwoven web of thermoplastic microfibers to provide electret filter media is provided. The method includes impinging on a nonwoven web of thermoplastic nonconductive microfibers capable of having a high quantity o...  
WO/1995/001079A1
A folded dielectric film element functioning as an energy converter, consisting of a dielectric film (1, 2) bent into folds (L) and provided with electrodes (K). The electrodes (K) are so arranged in the folds (L), different electrodes b...  
WO/1994/018242A1
A poromeric material for maintaining an electrostatic charge is provided, the material including a matrix (24, 124) of fibers (22, 122), a polymeric binder (26, 126) for binding the matrix, and electrets (28) present substantially unifor...  
WO/1994/013471A1
A method and resulting structure for growing a crystalline perovskite film (16) on a silicon dioxide layer (12) by means of an intermediate template layer (14) of a c-axis oriented layered perovskite, such as bismuth titanate. The perovs...  
WO/1994/013028A1
The disclosure relates to ferroelectric and superconducting thin films used in combination to produce low-loss frequency tunable microwave and mm-wave devices. Various metal oxide superconducting and ferroelectric films can be arranged i...  
WO/1994/003908A1
A method of forming crystalline metal oxide thin films on silicon and the resultant structure. A crystalline buffer layer (10) of yttria-stabilized zirconia is deposited on a silicon substate (12). A thin template layer (14) of an anisot...  
WO/1994/002954A1
A double layer capacitor comprising a conductive solid (10, 11) in contact with a gas (12), preferably an inert gas, to form a double layer capacitor of unusually high specific energy density (energy to weight ratio). The device may be s...  
WO/1993/018531A1
A ferroelectric memory and its method of making in which a highly c-axis oriented layer (56) of ferroelectric lead zirconate titanate (PZT) is epitaxially deposited at between 640° and 710 °C upon a crystalline film (54) of yttrium bar...  
WO/1993/016481A1
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...  
WO/1993/014510A1
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...  
WO/1993/011548A1
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...  
WO/1993/008578A1
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...  
WO/1993/006610A1
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...  
WO/1993/004495A1
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 ...  
WO/1991/018406A1
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...  
WO/1991/013922A1
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...  
WO/1991/005246A1
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 ...  
WO/1991/004566A1
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...  
WO/1990/005987A1
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...  
WO/1989/011724A1
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...  
WO/1989/011156A1
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...  
WO/1989/004061A1
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...  
WO/1988/009043A1
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...  
WO/1988/006064A1
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 ...  
WO/1987/004301A1
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...  
WO/1987/003088A1
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...  
WO/1987/000347A1
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...  
WO/1986/006752A1
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...  
WO/1986/002486A1
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 ...  
WO/1986/002487A1
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...  
WO/1985/004513A1
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...  
WO/1985/003381A1
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 ...  
WO/1985/001385A1
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...  
WO/1984/004865A1
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...  
WO/1984/003193A1
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 ...  
WO/1984/002424A1
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...  
WO/1983/003028A1
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...  
WO/1983/001536A1
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...  
WO/1983/000404A1
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...  
WO/1982/004346A1
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...  
WO/1982/003149A1
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...  

Matches 151 - 200 out of 2,100