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Patent Searching and Data


Matches 201 - 250 out of 2,131

Document Document Title
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 ...  
WO1984002424A3  
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...  
WO1984002424A2
Un matériau à électrets est formé par le procédé consistant à faire passer une paire d'éléments électriquement conducteurs (32) le long d'une surface d'un matériau diélectrique (20) chauffé à une température prédétermin...  
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...  
WO/1982/001455A1
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...  
WO/1982/001456A1
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...  
WO/1981/000786A1
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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To provide a variable capacitance element module with a high ESD resistance property.A substrate 30 is formed in a shape of a rectangular parallelepiped plate having a first side BS1 and a second side BS2 opposing each other with a varia...  
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To provide a variable capacity composite component having a large capacitance change rate, as a whole, by bringing out the essential capacitance change of each variable capacitance capacitor to the maximum.Variable capacitance capacitors...  
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Matches 201 - 250 out of 2,131